PCA9536 Datasheet by Texas Instruments

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PCA9536 Remote 4-Bit I2C and SMBus I/O Expander with Configuration Registers

1 Features

• Available in the Texas Instruments NanoFree™

Package

• Low standby current consumption of 1 μA Max

• I2C to parallel port expander

• Operating power-supply voltage range of 2.3 V to

5.5 V

• 5-V Tolerant I/O ports

• 400-kHz fast I2C bus

• Input and output configuration register

• Polarity inversion register

• Internal power-on reset

• No glitch on power up

• Power-up with all channels configured as inputs

• Noise filter on SCL/SDA inputs

• Latched outputs with high-current drive maximum

capability for directly driving LEDs

• Latch-up performance exceeds 100 mA per JESD

78, class II

• ESD Protection exceeds JESD 22

– 2000-V Human-body model (A114-A)

– 200-V Machine model (A115-A)

– 1000-V Charged-device model (C101)

2 Applications

• Personal electronics

–Wearables

–Mobile phones

–Gaming consoles

• Servers

• Routers

3 Description

This 4-bit I/O expander for the two-line bidirectional

bus (I2C) is designed for 2.3-V to 5.5-V VCC operation.

It provides general-purpose remote I/O expansion for

most microcontroller families through the I2C interface

[serial clock (SCL), serial data (SDA)].

The PCA9536 features 4-bit Configuration (input or

output selection), Input Port, Output Port, and Polarity

Inversion (active high or active low) registers. At

power on, the I/Os are configured as inputs with a

weak pullup to VCC. However, the system controller

can enable the I/Os as either inputs or outputs by

writing to the I/O configuration bits. If no signals are

applied externally to the PCA9536, the voltage level

is 1, or high, because of the internal pullup resistors.

The data for each input or output is stored in the

corresponding Input Port or Output Port register. The

polarity of the Input Port register can be inverted

with the Polarity Inversion register and the system

controller reads all registers.

The system controller resets the PCA9536 in the

event of a timeout or other improper operation by

utilizing the power-on reset feature, which puts the

registers in their default state and initializes the I2C/

SMBus state machine.

The device outputs (latched) have high-current drive

capability for directly driving LEDs, but has low current

consumption.

Device Information

PART NUMBER PACKAGE(1) BODY SIZE (NOM)

PCA9536 SOIC (8) 4.90 mm × 3.91 mm

VSSOP (8) 3.00 mm × 3.00 mm

(1) For all available packages, see the orderable addendum at

the end of the datasheet.

I2C or SMBus Controller

(e.g. Processor) PCA9536

GND

SCL

SDA

VCC

RESET, ENABLE, or

control inputs

INT or status outputs

LEDs

Buttons

Peripheral Devices

Simplified Schematic

PCA9536

SCPS125H – APRIL 2006 – REVISED MARCH 2022

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.

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Table of Contents

1 Features............................................................................1

2 Applications..................................................................... 1

3 Description.......................................................................1

4 Revision History.............................................................. 2

5 Pin Configuration and Functions...................................3

6 Specifications.................................................................. 4

6.1 Absolute Maximum Ratings........................................ 4

6.2 ESD Ratings............................................................... 4

6.3 Recommended Operating Conditions.........................4

6.4 Thermal Information....................................................4

6.5 Electrical Characteristics.............................................5

6.6 I2C Interface Timing Requirements.............................6

6.7 Switching Characteristics............................................6

6.8 Typical Characteristics................................................ 7

7 Parameter Measurement Information.......................... 10

8 Detailed Description......................................................12

8.1 Overview................................................................... 12

8.2 Functional Block Diagram......................................... 12

8.3 Feature Description...................................................13

8.4 Device Functional Modes..........................................13

8.5 Programming............................................................ 13

8.6 Register Maps...........................................................15

9 Application Information Disclaimer............................. 19

9.1 Application Information............................................. 19

9.2 Typical Application.................................................... 19

10 Power Supply Recommendations..............................22

10.1 Power-On Reset Errata...........................................22

10.2 System Impact........................................................ 22

11 Layout........................................................................... 23

11.1 Layout Guidelines................................................... 23

11.2 Layout Example...................................................... 23

12 Device and Documentation Support..........................24

12.1 Documentation Support.......................................... 24

12.2 Receiving Notification of Documentation Updates..24

12.3 Support Resources................................................. 24

12.4 Trademarks............................................................. 24

12.5 Electrostatic Discharge Caution..............................24

12.6 Glossary..................................................................24

13 Mechanical, Packaging, and Orderable

Information.................................................................... 24

4 Revision History

Changes from Revision G (June 2014) to Revision H (March 2022) Page

• Changed all instances of legacy terminology to controller and target where I2C is mentioned..........................1

• Deleted the DSBGA (YZP) package information................................................................................................ 1

• Added the Simplified Schematic to the front page..............................................................................................1

• Removed packaging information from the Absolute Maximum Ratings table.................................................... 4

• Added Tstg to the Absolute Maximum Ratings table........................................................................................... 4

• Added the Thermal Information table................................................................................................................. 4

• Deleted VPOR from the Electrical Characteristics ...............................................................................................5

• Added VPORR and VPORF to the Electrical Characteristics .................................................................................5

• Changed the ICC stand by mode current max values for 5.5 V from 1 to 1.8 μA; 3.6 V from 0.9 to 1.2 μA; and

2.7 V from 0.8 to 1 μA in the Electrical Characteristics ......................................................................................5

• Changed the tvd(data) and tvd(ack) MAX values from: 1 μs to: 3.45 μs in the Standard Mode timing....................6

• Changed the ticr, tocf, and tocf MIN values in the Fast Mode timing.....................................................................6

• Added the Overview section............................................................................................................................. 12

• Added the Device Functional Modes section....................................................................................................13

• Added Detailed Design Procedure section....................................................................................................... 20

• Added Application Curves section.................................................................................................................... 21

• Added the Layout section................................................................................................................................. 23

Changes from Revision F (September 2008) to Revision G (June 2014) Page

• Added Power-On Reset Errata section.............................................................................................................22

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5 Pin Configuration and Functions

1P0 8 VCC

2P1 7 SDA

3P2 6 SCL

4GND 5 P3

Not to scale

Figure 5-1. D Package, 8-Pin SOIC

(Top View)

1P0 8 VCC

2P1 7 SDA

3P2 6 SCL

4GND 5 P3

Not to scale

Figure 5-2. DGK Package, 8-Pin VSSOP,

Top View

Table 5-1. Pin Functions

PIN I/O DESCRIPTION

NO. NAME

1 P0 I/O P-port input-output. Push-pull design structure

2 P1 I/O P-port input-output. Push-pull design structure

3 P2 I/O P-port input-output. Push-pull design structure

4 GND — Ground

5 P3 I/O P-port input-output. Push-pull design structure

6 SCL I/O Serial clock bus. Connect to VCC through a pullup resistor

7 SDA I/O Serial data bus. Connect to VCC through a pullup resistor

8 VCC — Supply voltage

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6 Specifications

6.1 Absolute Maximum Ratings

over operating free-air temperature range (unless otherwise noted) See (1)

MIN MAX UNIT

VCC Supply voltage –0.5 6 V

VIInput voltage (2) –0.5 6 V

VOOutput voltage (2) –0.5 6 V

IIK Input clamp current VI < 0 –20 mA

IOK Output clamp current VO < 0 –20 mA

IIOK Input/output clamp current VO < 0 or VO > VCC ±20 mA

IOL Continuous output low current VO = 0 to VCC 50 mA

IOH Continuous output high current VO = 0 to VCC –50 mA

ICC

Continuous current through GND –200

Continuous current through VCC 160

Tstg Storage temperature –65 150 °C

(1) Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress

ratings only, which do not imply functional operation of the device at these or any other conditions beyond those indicated under

Recommended Operating Conditions. Exposure to absolute-maximum-rated conditions for extended periods may affect device

reliability.

(2) The input negative-voltage and output voltage ratings may be exceeded if the input and output current ratings are observed.

6.2 ESD Ratings

MIN MAX UNIT

V(ESD) Electrostatic discharge

Human body model (HBM), per ANSI/ESDA/JEDEC JS-001, all pins(1) 0 2000

Charged device model (CDM), per JEDEC specification JESD22-C101, all

pins(2) 0 1000

(1) JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process.

(2) JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process.

6.3 Recommended Operating Conditions

MIN MAX UNIT

VCC Supply voltage 2.3 5.5 V

VIH High-level input voltage SCL, SDA 0.7 × VCC 5.5 V

P3–P0 2 5.5

VIL Low-level input voltage SCL, SDA –0.5 0.3 × VCC V

P3–P0 –0.5 0.8

IOH High-level output current P3–P0 –10 mA

IOL Low-level output current P3–P0 25 mA

TAOperating free-air temperature –40 85 °C

6.4 Thermal Information

THERMAL METRIC(1) D (SOIC) DGK (VSSOP)

UNIT

8 PINS 8 PINS

RθJA Junction-to-ambient thermal resistance 141.9 183.7 °C/W

RθJC(top) Junction-to-case (top) thermal resistance 82.6 76.9 °C/W

RθJB Junction-to-board thermal resistance 85.3 104.9 °C/W

ψJT Junction-to-top characterization parameter 32.3 18.7 °C/W

ψJB Junction-to-board characterization parameter 84.6 103.4 °C/W

(1) For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application

report.

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6.5 Electrical Characteristics

over recommended operating free-air temperature range (unless otherwise noted)

PARAMETER TEST CONDITIONS VCC MIN TYP(1) MAX UNIT

VIK Input diode clamp voltage II = –18 mA 2.3 V to 5.5 V –1.2 0 V

VPORR Power-on reset voltage, VCC rising VI = VCC or GND, IO = 0 1.2 1.6 V

VPORF Power-on reset voltage, VCC falling VI = VCC or GND, IO = 0 0.75 1 V

VOH

P-port high-level

output voltage(2)

IOH = –8 mA

2.3 V 1.8

3 V 2.6

4.5 V 4.1

4.75 V 4.1

IOH = –10 mA

2.3 V 1.7

3 V 2.5

4.5 V 4

4.75 V 4

IOL

SDA VOL = 0.4 V 2.3 V to 5.5 V 3 10

P-port(3)

VOL = 0.5 V

2.3 V 8 10

3 V 8 14

4.5 V 8 17

4.75 V 8 32

VOL = 0.7 V

2.3 V 10 13

3 V 10 19

4.5 V 10 24

4.75 V 10 44

IISCL, SDA VI = VCC or GND 2.3 V to 5.5 V ±1 μA

IIH P-port VI = VCC 2.3 V to 5.5 V 1 μA

IIL P-port VI = GND 2.3 V to 5.5 V –100 μA

ICC

Operating mode

VI = VCC, IO = 0,

I/O = inputs, fscl = 400 kHz

5.5 V 73 150

μA

3.6 V 9 50

2.7 V 7 30

VI = VCC, IO = 0,

I/O = inputs, fscl = 100 kHz

5.5 V 14 25

3.6 V 9 20

2.7 V 6 15

Standby mode

VI = GND, IO = 0,

I/O = inputs, fscl = 0 kHz

5.5 V 225 350

3.6 V 175 250

2.7 V 125 200

VI = VCC, IO = 0,

I/O = inputs, fscl = 0 kHz

5.5 V 0.25 1.8

3.6 V 0.2 1.2

2.7 V 0.1 1

ΔICC

Additional current in

standby mode

One input at VCC – 0.6 V,

Other inputs at VCC or GND 2.3 V to 5.5 V 0.35

Every LED I/O at VI = 4.3 V,

fscl = 0 kHz 5.5 V 0.4

CiSCL VI = VCC or GND 2.3 V to 5.5 V 4 5 pF

Cio

SDA

VIO = VCC or GND 2.3 V to 5.5 V

5 6.5

P-port 7.5 9.5

(1) All typical values are at nominal supply voltage (2.5-, 3.3-, or 5-V VCC) and TA = 25°C.

(2) The total current sourced by all I/Os must be limited to 85 mA.

(3) Each I/O must be limited externally to a maximum of 25 mA, and the P-port (P3–P0) must be limited to a maximum current of 100 mA.

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6.6 I2C Interface Timing Requirements

over recommended operating free-air temperature range (unless otherwise noted) (see Figure 7-1)

MIN MAX UNIT

Standard Mode

fscl I2C clock frequency 0 100 kHz

tsch I2C clock high time 4 μs

tscl I2C clock low time 4.7 μs

tsp I2C spike time 50 ns

tsds I2C serial-data setup time 250 ns

tsdh I2C serial-data hold time 0 ns

ticr I2C input rise time 1000 ns

ticf I2C input fall time 300 ns

tocf I2C output fall time, 10-pF to 400-pF bus 300 ns

tbuf I2C bus free time between Stop and Start 4.7 μs

tsts I2C Start or repeated Start condition setup time 4.7 μs

tsth I2C Start or repeated Start condition hold time 4 μs

tsps I2C Stop condition setup time 4 μs

tvd(data) Valid data time, SCL low to SDA output valid 3.45 μs

tvd(ack) Valid data time of ACK condition, ACK signal from SCL low to SDA (out) low 3.45 μs

CbI2C bus capacitive load 400 pF

Fast Mode

fscl I2C clock frequency 0 400 kHz

tsch I2C clock high time 0.6 μs

tscl I2C clock low time 1.3 μs

tsp I2C spike time 50 ns

tsds I2C serial-data setup time 100 ns

tsdh I2C serial-data hold time 0 ns

ticr I2C input rise time 20(1) 300 ns

ticf I2C input fall time 20x(Vdd/5.5V)

(1) 300 ns

tocf I2C output fall time, 10-pF to 400-pF bus 20x(Vdd/5.5V)

(1) 300 ns

tbuf I2C bus free time between Stop and Start 1.3 μs

tsts I2C Start or repeated Start condition setup time 0.6 μs

tsth I2C Start or repeated Start condition hold time 0.6 μs

tsps I2C Stop condition setup time 0.6 μs

tvd(data) Valid data time, SCL low to SDA output valid 0.9 μs

tvd(ack) Valid data time of ACK condition, ACK signal from SCL low to SDA (out) low 0.9 μs

CbI2C bus capacitive load 400 pF

(1) Cb = Total capacitive load of one bus in pF

6.7 Switching Characteristics

over recommended operating free-air temperature range (unless otherwise noted) (see Figure 7-2)

PARAMETER FROM

(INPUT)

(OUTPUT) MIN MAX UNIT

STANDARD MODE and FAST MODE

tpv Output data valid SCL P3–P0 200 ns

tps Input data setup time P-port SCL 100 ns

tph Input data hold time P-port SCL 1 μs

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6.8 Typical Characteristics

TA = 25°C (unless otherwise noted)

-50 -25 0 25 50 75 100

TA– Free-Air Temperature – °C

ICC – Supply Current – µA

VCC = 2.5 V

VCC = 3.3 V

VCC = 5 V

fSCL = 400 kHz

I/Os unloaded

Figure 6-1. Supply Current vs Temperature

100

150

200

250

300

-50 -25 0 25 50 75 100

TA– Free-Air Temperature – °C

ICC – Supply Current – nA

VCC = 2.5 V

VCC = 3.3 V

VCC = 5 V

SCL = VCC

Figure 6-2. Quiescent Supply Current vs Temperature

2.3 2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5

VCC – Supply Voltage – V

ICC – Supply Current – µA

fSCL = 400 kHz

I/Os unloaded

Figure 6-3. Supply Current vs Supply Voltage

100

125

150

175

200

225

250

275

300

0 1 2 3 4

Number of I/Os Held Low

ICC – Supply Current – µA

TA= –40°C

VCC = 5 V

TA= 25°C

TA= 85°C

Figure 6-4. Supply Current vs Number of I/Os Held Low

100

125

150

175

200

225

250

275

300

-50 -25 0 25 50 75 100

TA– Free-Air Temperature – °C

VOL – Output Low Voltage – mV

VCC = 5 V, ISINK = 10 mA

VCC = 2.5 V, ISINK = 10 mA

VCC = 2.5 V, ISINK = 1 mA

VCC = 5 V, ISINK = 1 mA

Figure 6-5. I/O Output Low Voltage vs Temperature

100

125

150

175

200

225

250

275

300

-50 -25 0 25 50 75 100

TA– Free-Air Temperature – °C

(VCC – VOH ) – Output High Voltage – mV

VCC = 5 V, IOL = 10 mA

VCC = 2.5 V, IOL = 10 mA

Figure 6-6. I/O Output High Voltage vs Temperature

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6.8 Typical Characteristics (continued)

TA = 25°C (unless otherwise noted)

0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7

VOL – Output Low Voltage – V

ISINK – I/O Sink Current – mA

TA= –40°C

VCC = 2.5 V

TA= 25°C

TA= 85°C

Figure 6-7. I/O Sink Current vs Output Low Voltage

0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7

VOL – Output Low Voltage – V

ISINK – I/O Sink Current – mA

TA= –40°C

VCC = 3.3 V

TA= 25°C

TA= 85°C

Figure 6-8. I/O Sink Current vs Output Low Voltage

0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7

VOL – Output Low Voltage – V

ISINK – I/O Sink Current – mA

TA= –40°C

VCC = 5 V

TA= 25°C

TA= 85°C

Figure 6-9. I/O Sink Current vs Output Low Voltage

0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7

(VCC – VOH) – Output High Voltage – V

ISOURCE – I/O Source Current – mA

TA= –40°C

VCC = 2.5 V

TA= 25°C

TA= 85°C

Figure 6-10. I/O Source Current vs Output High Voltage

0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7

(VCC – VOH) – Output High Voltage – V

ISOURCE – I/O Source Current – mA

TA= –40°C

VCC = 3.3 V

TA= 25°C

TA= 85°C

Figure 6-11. I/O Source Current vs Output High Voltage

0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7

(VCC – VOH) – Output High Voltage – V

ISOURCE – I/O Source Current – mA

TA= –40°C

VCC = 5 V

TA= 25°C

TA= 85°C

Figure 6-12. I/O Source Current vs Output High Voltage

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6.8 Typical Characteristics (continued)

TA = 25°C (unless otherwise noted)

2.3 2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5

VCC – Supply Voltage – V

VOH – Output High Voltage – V

IOH = –10 mA

IOH = –8 mA

TA= 25°C

Figure 6-13. Output High Voltage vs Supply Voltage

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7 Parameter Measurement Information

Start or

Repeat

Start

Condition

Repeat

Start

Condition

Stop

Condition

tbuf

ticf

ticr

tscl tsch

tsds

tsdh

tsp

tPHL

tPLH

tsps

tsts

SCL

SDA

0.7 x VCC

0.3 x VCC

0.7 x VCC

0.3 x VCC

DUT

CL = 50 pF

(see Note A)

VCC

RL = 1 NŸ

SDA

VOLTAGE WAVEFORMS

Three Bytes for Complete

Device Programming

SDA LOAD CONFIGURATION

Stop

Condition

(P)

Start

Condition

(S)

Address

Bit 7

(MSB)

Address

Bit 6

Address

Bit 1

R/W

Bit 0

(LSB)

ACK

(A)

Data

Bit 7

(MSB)

Data

Bit 0

(LSB)

Stop

Condition

(P)

A. CL include probe and jig capacitance.

B. All inputs are supplied by generators having the following characteristics: PRR ≤ 10 MHz, ZO = 50 Ω, tr/tf ≤ 30 ns.

C. All parameters and waveforms are not applicable to all devices.

Figure 7-1. I2C Interface Load Circuit and Voltage Waveforms

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DUT

Pn 500

2 x VCC

500

CL = 50 pF

(see Note A)

0.7 x VCC

0.3 x VCC

SCL

SDA

P0 A

Target

ACK

Unstable Data Last Stable Bit

tpv

(see Note B)

P-PORT LOAD CONFIGURATION

WRITE MODE (R/W = 0)

SCL

tps

tph

0.7 x VCC

0.3 x VCC

0.7 x VCC

0.3 x VCC

READ MODE (R/W = 1)

A. CL include probe and jig capacitance.

B. tpv is measured from 0.7 × VCC on SCL to 50% I/O (Pn) output.

C. All inputs are supplied by generators having the following characteristics: PRR ≤ 10 MHz, ZO = 50 Ω, tr/tf ≤ 30 ns.

D. The outputs are measured one at a time, with one transition per measurement.

E. All parameters and waveforms are not applicable to all devices.

Figure 7-2. P-Port Load Circuit and Voltage Waveforms

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8 Detailed Description

8.1 Overview

The PCA9536 device is a 4-bit I/O expander for the I2C bus and is designed for 1.65-V to 5.5-V VCC operation. It

provides general-purpose remote I/O expansion for most microcontroller families through the I2C interface.

The PCA9536 consists of a configuration (input or output selection), Input Port, Output Port, and Polarity

Inversion (active-high or active-low operation) registers. At power-on, the I/Os are configured as inputs. The

system controller enables the I/Os as either inputs or outputs by writing to the I/O configuration register bits. The

data for each input or output is kept in the corresponding input or output register. The polarity of the Input Port

The device outputs (latched) have high-current drive capability for directly driving LEDs.

8.2 Functional Block Diagram

Input

Filter I2C Bus

Control

Shift

4 Bits I/O

Port P3-P0

Power-On

Reset

SCL

SDA

VCC

GND

Write Pulse

Read Pulse

Figure 8-1. Logic Diagram

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CKQFF

CKQ

Data From

Shift Register

Data From

Shift Register

Write Configuration

Pulse

Write Pulse

Read Pulse

Data From Shift

Write Polarity

Pulse

Configuration

Output Port

Polarity Inversion

Output Port

VCC

P0 to P3

GND

Input Port

Polarity

ESD Protection

Diode

100 NŸ

Figure 8-2. Simplified Schematic Of P0 To P3

8.3 Feature Description

8.3.1 I/O Port

When an I/O is configured as an input, FETs Q1 and Q2 (in Figure 8-2) are off, creating a high-impedance input

with a weak pullup (100 kΩ typical) to VCC. The input voltage may be raised above VCC to a maximum of 5.5 V.

If the I/O is configured as an output, Q1 or Q2 is enabled, depending on the state of the output port register.

In this case, there are low-impedance paths between the I/O pin and either VCC or GND. The external voltage

applied to this I/O pin should not exceed the recommended levels for proper operation.

8.4 Device Functional Modes

8.4.1 Power-On Reset

When power (from 0 V) is applied to VCC, an internal power-on reset holds the PCA9536 in a reset condition until

VCC has reached VPOR. At that time, the reset condition is released and the PCA9536 registers and I2C/SMBus

state machine initialize to their default states. After that, VCC must be lowered to below 0.2 V and then back up to

the operating voltage for a power-reset cycle.

Refer to the Section 10.1 section.

8.4.2 Powered-Up

When power has been applied to VCC above VPORR, and the POR has taken place, the device is in a functioning

mode. In this state, the device is ready to accept any incoming I2C requests and monitors for changes on the

input ports.

8.5 Programming

8.5.1 I2C Interface

The bidirectional I2C bus consists of the serial clock (SCL) and serial data (SDA) lines. Both lines must be

connected to a positive supply through a pullup resistor when connected to the output stages of a device. Data

transfer may be initiated only when the bus is not busy.

I2C communication with this device is initiated by a controller sending a Start condition, which is a high-to-low

transition on the SDA input and output while the SCL input is high (see Figure 8-3). After the Start condition, the

device address byte is sent, most-significant bit (MSB) first, including the data direction bit (R/ W).

After receiving the valid address byte, this device responds with an acknowledge (ACK), a low on the SDA input

and output during the high of the ACK-related clock pulse.

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On the I2C bus, only one data bit is transferred during each clock pulse. The data on the SDA line must remain

stable during the high pulse of the clock period, as changes in the data line at this time are interpreted as control

commands (Start or Stop) (see Figure 8-4).

A Stop condition, a low-to-high transition on the SDA input and output while the SCL input is high, is sent by the

controller (see Figure 8-3).

Any number of data bytes can be transferred from the transmitter to receiver between the Start and the Stop

conditions. Each byte of eight bits is followed by one ACK bit. The transmitter must release the SDA line before

the receiver can send an ACK bit. The device that acknowledges must pull down the SDA line during the ACK

clock pulse, so that the SDA line is stable low during the high pulse of the ACK-related clock period (see Figure

8-5). When a target receiver is addressed, it must generate an ACK after each byte is received. Similarly, the

controller must generate an ACK after each byte that it receives from the target transmitter. Setup and hold times

must be met to ensure proper operation.

A controller receiver signals an end of data to the target transmitter by not generating an acknowledge (NACK)

after the last byte has been clocked out of the target. This is done by the controller receiver, by holding the SDA

line high. In this event, the transmitter must release the data line to enable the controller to generate a Stop

condition.

SDA

SCL SP

Start Condition Stop Condition

Figure 8-3. Definition of Start and Stop Conditions

SDA

SCL

Data Line

Stable;

Data Valid

Change

Of Data

Allowed

Figure 8-4. Bit Transfer

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{5‘ TEXAS INSTRUMENTS X K Condman waed

NACK

ACK

Start

Condition

Data Output

By Receiver

Data Output

By Transmitter

SCL From

Controller

1 2 8 9

Clock Pulse for

Acknowledgment

Figure 8-5. Acknowledgment on the I2C Bus

8.6 Register Maps

Table 8-1 shows the PCA9536 interface definition.

Table 8-1. Interface Definition

BYTE BIT

7 (MSB) 6 5 4 3 2 1 0 (LSB)

I2C target address H L L L L L H R/ W

Px I/O data bus Does not affect operation of the PCA9536 P3 P2 P1 P0

P7 P6 P5 P4

8.6.1 Device Address

Figure 8-6 shows the address byte of the PCA9536.

Target Address

Fixed

1 0 0 0 0 0 1 1

Figure 8-6. PCA9536 Address

The target address equates to 65 (decimal) and 41 (hexadecimal).

The last bit of the target address defines the operation (read or write) to be performed. When it is high (1), a read

is selected, while a low (0) selects a write operation.

8.6.2 Control Register and Command Byte

Following the successful acknowledgment of the address byte, the bus controller sends a command byte that is

stored in the control register in the PCA9536. Two bits of this data byte state the operation (read or write) and

the internal register (Input, Output, Polarity Inversion, or Configuration) that will be affected. This register can be

written or read through the I2C bus. The command byte is sent only during a write transmission.

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I TEXAS INSTRUMENTS

Once a command byte has been sent, the addressed register is continuosly accessed by reads until a new

command byte is sent.

Figure 8-7 shows the PCA9536 control register bits and Table 8-2 shows the command byte.

0 0 0 0 0 0 B1 B0

Figure 8-7. Control Register Bits

Table 8-2. Command Byte

CONTROL REGISTER BITS COMMAND BYTE

(HEX) REGISTER PROTOCOL POWER-UP

DEFAULT

B1 B0

0 0 0×00 Input Port Read byte 1111 XXXX

0 1 0×01 Output Port Read/write byte 1111 1111

1 0 0×02 Polarity Inversion Read/write byte 0000 0000

1 1 0×03 Configuration Read/write byte 1111 1111

8.6.3 Register Descriptions

The Input Port register (register 0) reflects the incoming logic levels of the pins, regardless of whether the pin

is defined as an input or an output by the Configuration register. It only acts on read operation. Writes to these

registers have no effect. The default value, X, is determined by the externally applied logic level. See Table 8-3.

Before a read operation, a write transmission is sent with the command byte to instruct the I2C device that the

Input Port register will be accessed next.

Table 8-3. Register 0 (Input Port Register)

BIT I7 I6 I5 I4 I3 I2 I1 I0

Not Used

DEFAULT 1 1 1 1 X X X X

The Output Port register (register 1) shows the outgoing logic levels of the pins defined as outputs by the

Configuration register. The bit values in this register have no effect on pins defined as inputs. In turn, reads from

this register reflect the value that is in the flip-flop controlling the output selection, not the actual pin value. See

Table 8-4.

Table 8-4. Register 1 (Output Port Register)

BIT O7 O6 O5 O4 O3 O2 O1 O0

Not Used

DEFAULT 11111111

The Polarity Inversion register (register 2) allows polarity inversion of pins defined as inputs by the Configuration

register. If a bit in this register is set (written with 1), the corresponding port pin's polarity is inverted. If a bit in this

Table 8-5. Register 2 (Polarity Inversion Register)

BIT N7 N6 N5 N4 N3 N2 N1 N0

Not Used

DEFAULT 00000000

The Configuration register (register 3) configures the directions of the I/O pins. If a bit in this register is set to

1, the corresponding port pin is enabled as an input with high-impedance output driver. If a bit in this register is

cleared to 0, the corresponding port pin is enabled as an output. See Table 8-6.

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I TEXAS INSTRUMENTS WWW 111111111111111111111 """" 1111 T HT 3‘1 1? 1 1 F 1 1 1X 1 1 «e 1111111111311111111131 """" 1311 1 MT 11 11 1 1 1n

Table 8-6. Register 3 (Configuration Register)

BIT C7 C6 C5 C4 C3 C2 C1 C0

Not Used

DEFAULT 11111111

8.6.4 Bus Transactions

Data is exchanged between the controller and PCA9536 through write and read commands.

8.6.4.1 Writes

Data is transmitted to the PCA9536 by sending the device address and setting the least-significant bit (LSB) to a

logic 0 (see Figure 8-6 for device address). The command byte is sent after the address and determines which

in one write transmission (see Figure 8-8 and Figure 8-9).

Data 1

1 0 0 0 0 0 1 0 A A A

S0000011 P

12346 7 8 9

Start Condition ACK From Target ACK From Target ACK From Target

R/W

Target Address Command Byte Data to Register

SCL

SDA

Write to

Port

tpv

Data Out

From Port Data 1 Valid

Figure 8-8. Write to Output Port Register

<br/>

Data

1 0 0 0 0 0 1 0 A A A

S0000011 P

()

12346 7 8 9

Start Condition ACK From Target ACK From Target ACK From Target

R/W

Target Address Command Byte Data to Register

SCL

SDA

Data to

Figure 8-9. Write to Configuration or Polarity Inversion Registers

8.6.4.2 Reads

The bus controller first must send the PCA9536 address with the LSB set to a logic 0 (see Figure 8-6 for

device address). The command byte is sent after the address and determines which register is accessed. After a

restart, the device address is sent again but, this time, the LSB is set to a logic 1. Data from the register defined

by the command byte then is sent by the PCA9536 (see Figure 8-10 and Figure 8-11). After a restart, the value

of the register defined by the command byte matches the register being accessed when the restart occurred.

Data is clocked into the register on the rising edge of the ACK clock pulse. There is no limitation on the number

of data bytes received in one read transmission, but when the final byte is received, the bus controller must not

acknowledge the data.

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ITEXAs INSTRUMENTS Addless ACK lerl ACKme Address ACK Flam Dali "om Hegisler ACK From /—’E t HE ‘ ‘ X5|1|0|0|DIOIOIIIUIAI CommandByte |‘|5|‘|°|“|°ID|0|1IIIAI'"n'ana"' A” X r ﬁ/W RW Data vmm Regislev MACK no... [I /—/% X Last Byte ' '3' V :H R 71 H n :X X X X X‘

Target Target Target Target Target Controller

Controller

At this time, the controller-transmitter

becomes controller-receiver and

target-receiver becomes target-transmitter

Figure 8-10. Read From Register

<br/>

SCL

SDA

INT

Start

Condition

R/W

Read From

Port

Data Into

Port

Stop

Condition

ACK From

Controller

NACK From

Controller

ACK From

Target

Data From Port

Target Address Data From Port

1 98765432

0 0 11AData 1 Data 4

A NA P

Data 2 Data 3 Data 4

tiv

tph tps

tir

Data 5

A. This figure assumes that the command byte previously has been programmed with 00h.

B. Transfer of data can be stopped at any moment by a Stop condition.

C. This figure eliminates the command byte transfer, a restart, and the target address call between the initial target address call and actual

data transfer from the P-port (see Figure 8-10).

Figure 8-11. Read Input Port Register

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I TEXAS INSTRUMENTS

9 Application Information Disclaimer

Note

Information in the following applications sections is not part of the TI component specification,

and TI does not warrant its accuracy or completeness. TI’s customers are responsible for

determining suitability of components for their purposes, as well as validating and testing their design

implementation to confirm system functionality.

9.1 Application Information

9.2 Typical Application

Figure 9-1 shows an application in which the PCA9536 can be used.

I2C

Controller

PCA9536

Subsystem 1

(e.g., temperature

sensor)

Subsystem 2

(e.g., counter)

ENABLE

SCL

SDA

GND

SCL

SDA

GND

VCC

INT

RESET

10 kΩ 10 kΩ 2 kΩ

A. Device address is 10000001.

B. P0, P2, and P3 are configured as outputs.

C. P1 is configured as an input.

Figure 9-1. Typical Application

9.2.1 Design Requirements

9.2.1.1 Minimizing ICC When I/Os Control LEDs

When the I/Os are used to control LEDs, they are normally connected to VCC through a resistor as shown

in Figure 9-1. The LED acts as a diode so, when the LED is off, the I/O VIN is about 1.2 V less than VCC.

The supply current, ICC, increases as VIN becomes lower than VCC and is specified as ΔICC in Electrical

Characteristics.

Designs needing to minimize current consumption, such as battery power applications, should consider

maintaining the I/O pins greater than or equal to VCC when the LED is off. Figure 9-2 shows a high-value

resistor in parallel with the LED. Figure 9-3 shows VCC less than the LED supply voltage by at least 1.2 V. Both

of these methods maintain the I/O VIN at or above VCC and prevent additional supply-current consumption when

the LED is off.

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LED

VCC

100 NŸ

Figure 9-2. High-Value Resistor in Parallel with the LED

VCC

LED

3.3 V 5 V

Figure 9-3. Device Supplied by a Lower Voltage

9.2.2 Detailed Design Procedure

The pull-up resistors, RP, for the SCL and SDA lines need to be selected appropriately and take into

consideration the total capacitance of all targets on the I2C bus. The minimum pull-up resistance is a function of

VCC, VOL,(max), and IOL as shown in Equation 1:

CC OL(max)

p(min)

V V

(1)

The maximum pull-up resistance is a function of the maximum rise time, tr (300 ns for fast-mode operation, fSCL

= 400 kHz) and bus capacitance, Cb as shown in Equation 2:

p(max)

R0.8473 C

(2)

The maximum bus capacitance for an I2C bus must not exceed 400 pF for standard-mode or fast-mode

operation. The bus capacitance can be approximated by adding the capacitance of the PCA9536, Ci for SCL

or Cio for SDA, the capacitance of wires,connections or traces, and the capacitance of additional targets on the

bus.

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I TEXAS INSTRUMENTS 25

9.2.3 Application Curves

Bus Capacitance (pF)

Maximum Pull-Up Resistance (k:)

0 50 100 150 200 250 300 350 400 450

D008

Standard-Mode

Fast-Mode

Standard-mode: fSCL = 100 kHz, tr = 1 µs

Fast-mode: fSCL = 400 kHz, tr = 300 ns

Figure 9-4. Maximum Pull-Up Resistance (Rp(max))

vs Bus Capacitance (Cb)

Pull-Up Reference Voltage (V)

Minimum Pull-Up Resistance (k:)

0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5

0.2

0.4

0.6

0.8

1.2

1.4

1.6

1.8

D009

VDPUX > 2 V

VDUPX </= 2

VOL = 0.2 × VCC, IOL = 2 mA when VCC ≤ 2 V

VOL = 0.4 V, IOL = 3 mA when VCC > 2 V

Figure 9-5. Minimum Pull-Up Resistance (Rp(min))

vs Pull-up Reference Voltage (VCC)

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i TEXAS INSTRUMENTS POWER-ON RESET CYCLE T“; is the time the! the VCC pin stays at O V TR.“ is the time for the VCC pin to go from 0 V to original vcc value Forbutoponﬂon.m To" > 100m: Ind T... < 10m:="">

10 Power Supply Recommendations

10.1 Power-On Reset Errata

A power-on reset condition can be missed if the VCC ramps are outside specification listed in Figure 10-1.

Figure 10-1. Power-On Reset Cycle

10.2 System Impact

If ramp conditions are outside timing allowances above, POR condition can be missed, causing the device to

lock up.

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I TEXAS INSTRUMENTS

11 Layout

11.1 Layout Guidelines

For printed circuit board (PCB) layout of the PCA9536, common PCB layout practices must be followed but

additional concerns related to high-speed data transfer such as matched impedances and differential pairs are

not a concern for I2C signal speeds.

In all PCB layouts, it is a best practice to avoid right angles in signal traces, to fan out signal traces away from

each other upon leaving the vicinity of an integrated circuit (IC), and to use thicker trace widths to carry higher

amounts of current that commonly pass through power and ground traces. By-pass and de-coupling capacitors

are commonly used to control the voltage on the VCC pin, using a larger capacitor to provide additional power

in the event of a short power supply glitch and a smaller capacitor to filter out high-frequency ripple. These

capacitors must be placed as close to the PCA9536 as possible.

For the layout example provided, it would be possible to fabricate a PCB with only 2 layers by using the top layer

for signal routing and the bottom layer as a split plane for power (VCC) and ground (GND). However, a 4-layer

board is preferable for boards with higher density signal routing. On a 4-layer PCB, it is common to route signals

on the top and bottom layer, dedicate one internal layer to a ground plane, and dedicate the other internal layer

to a power plane. In a board layout using planes or split planes for power and ground, vias are placed directly

next to the surface mount component pad which needs to attach to VCC or GND and the via is connected

electrically to the internal layer or the other side of the board. Vias are also used when a signal trace needs to be

routed to the opposite side of the board, but this technique is not demonstrated.

11.2 Layout Example

GND

SDA

SCL

VCC

PCA9536

CAP

GND

Figure 11-1. Layout Example (DGK)

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12 Device and Documentation Support

12.1 Documentation Support

12.1.1 Related Documentation

For related documentation see the following:

•I2C Bus Pull-Up Resistor Calculation

•Maximum Clock Frequency of I2C Bus Using Repeaters

•Introduction to Logic

•Understanding the I2C Bus

•Choosing the Correct I2C Device for New Designs

12.2 Receiving Notification of Documentation Updates

To receive notification of documentation updates, navigate to the device product folder on ti.com. Click on

Subscribe to updates to register and receive a weekly digest of any product information that has changed. For

change details, review the revision history included in any revised document.

12.3 Support Resources

TI E2E™ support forums are an engineer's go-to source for fast, verified answers and design help — straight

from the experts. Search existing answers or ask your own question to get the quick design help you need.

Linked content is provided "AS IS" by the respective contributors. They do not constitute TI specifications and do

not necessarily reflect TI's views; see TI's Terms of Use.

12.4 Trademarks

NanoFree™ and TI E2E™ are trademarks of Texas Instruments.

All trademarks are the property of their respective owners.

12.5 Electrostatic Discharge Caution

This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled

with appropriate precautions. Failure to observe proper handling and installation procedures can cause damage.

ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may

be more susceptible to damage because very small parametric changes could cause the device not to meet its published

specifications.

12.6 Glossary

TI Glossary This glossary lists and explains terms, acronyms, and definitions.

13 Mechanical, Packaging, and Orderable Information

The following pages include mechanical, packaging, and orderable information. This information is the most

current data available for the designated devices. This data is subject to change without notice and revision of

this document. For browser-based versions of this data sheet, refer to the left-hand navigation.

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I TEXAS INSTRUMENTS

PACKAGE OPTION ADDENDUM

www.ti.com 3-Jun-2022

PACKAGING INFORMATION

Orderable Device Status

(1)

Package Type Package

Drawing Pins Package

Qty Eco Plan

(2)

Lead finish/

Ball material

(6)

MSL Peak Temp

(3)

Op Temp (°C) Device Marking

(4/5)

Samples

PCA9536D NRND SOIC D 8 75 RoHS & Green NIPDAU Level-1-260C-UNLIM -40 to 85 PD536

PCA9536DG4 NRND SOIC D 8 75 RoHS & Green NIPDAU Level-1-260C-UNLIM -40 to 85 PD536

PCA9536DGKR ACTIVE VSSOP DGK 8 2500 RoHS & Green NIPDAU | NIPDAUAG Level-1-260C-UNLIM -40 to 85 (7CF, 7CL) Samples

PCA9536DGKRG4 ACTIVE VSSOP DGK 8 2500 RoHS & Green NIPDAU Level-1-260C-UNLIM -40 to 85 (7CF, 7CL) Samples

PCA9536DR ACTIVE SOIC D 8 2500 RoHS & Green NIPDAU Level-1-260C-UNLIM -40 to 85 PD536 Samples

PCA9536DRG4 ACTIVE SOIC D 8 2500 RoHS & Green NIPDAU Level-1-260C-UNLIM -40 to 85 PD536 Samples

(1) The marketing status values are defined as follows:

ACTIVE: Product device recommended for new designs.

LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.

NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.

PREVIEW: Device has been announced but is not in production. Samples may or may not be available.

OBSOLETE: TI has discontinued the production of the device.

(2) RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance

do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may

reference these types of products as "Pb-Free".

RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption.

Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of <=1000ppm threshold. Antimony trioxide based

flame retardants must also meet the <=1000ppm threshold requirement.

(3) MSL, Peak Temp. - The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature.

(4) There may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device.

(5) Multiple Device Markings will be inside parentheses. Only one Device Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation

of the previous line and the two combined represent the entire Device Marking for that device.

(6) Lead finish/Ball material - Orderable Devices may have multiple material finish options. Finish options are separated by a vertical ruled line. Lead finish/Ball material values may wrap to two

lines if the finish value exceeds the maximum column width.

Addendum-Page 1

TEXAS INSTRUMENTS

PACKAGE OPTION ADDENDUM

www.ti.com 3-Jun-2022

Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information

provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and

continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals.

TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release.

In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.

Addendum-Page 2

I TEXAS INSTRUMENTS ‘3‘ V.'

PACKAGE MATERIALS INFORMATION

www.ti.com 9-Aug-2022

TAPE AND REEL INFORMATION

Reel Width (W1)

REEL DIMENSIONS

Dimension designed to accommodate the component length

Dimension designed to accommodate the component thickness

Overall width of the carrier tape

Pitch between successive cavity centers

Dimension designed to accommodate the component width

TAPE DIMENSIONS

K0 P1

B0 W

Cavity

QUADRANT ASSIGNMENTS FOR PIN 1 ORIENTATION IN TAPE

Pocket Quadrants

Sprocket Holes

Q1 Q1Q2 Q2

Q3 Q3Q4 Q4 User Direction of Feed

Reel

Diameter

*All dimensions are nominal

Device Package

Type Package

Drawing Pins SPQ Reel

Diameter

(mm)

Reel

Width

W1 (mm)

(mm) B0

(mm) K0

(mm) P1

(mm) W

(mm) Pin1

Quadrant

PCA9536DGKR VSSOP DGK 8 2500 330.0 12.4 5.3 3.4 1.4 8.0 12.0 Q1

Pack Materials-Page 1

PACKAGE MATERIALS INFORMATION

www.ti.com 9-Aug-2022

TAPE AND REEL BOX DIMENSIONS

Width (mm)

*All dimensions are nominal

Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm)

PCA9536DGKR VSSOP DGK 8 2500 364.0 364.0 27.0

PCA9536DGKR VSSOP DGK 8 2500 358.0 335.0 35.0

Pack Materials-Page 2

I TEXAS INSTRUMENTS

PACKAGE MATERIALS INFORMATION

www.ti.com 9-Aug-2022

TUBE

L - Tube length

T - Tube

height

W - Tube

width

B - Alignment groove width

*All dimensions are nominal

Device Package Name Package Type Pins SPQ L (mm) W (mm) T (µm) B (mm)

PCA9536D D SOIC 8 75 507 8 3940 4.32

PCA9536D D SOIC 8 75 506.6 8 3940 4.32

PCA9536DG4 D SOIC 8 75 506.6 8 3940 4.32

PCA9536DG4 D SOIC 8 75 507 8 3940 4.32

Pack Materials-Page 3

‘J

www.ti.com

PACKAGE OUTLINE

.228-.244 TYP

[5.80-6.19]

.069 MAX

[1.75]

6X .050

[1.27]

8X .012-.020

[0.31-0.51]

.150

[3.81]

.005-.010 TYP

[0.13-0.25]

0 - 8 .004-.010

[0.11-0.25]

.010

[0.25]

.016-.050

[0.41-1.27]

4X (0 -15 )

.189-.197

[4.81-5.00]

NOTE 3

B .150-.157

[3.81-3.98]

NOTE 4

4X (0 -15 )

(.041)

[1.04]

SOIC - 1.75 mm max heightD0008A

SMALL OUTLINE INTEGRATED CIRCUIT

4214825/C 02/2019

NOTES:

1. Linear dimensions are in inches [millimeters]. Dimensions in parenthesis are for reference only. Controlling dimensions are in inches.

Dimensioning and tolerancing per ASME Y14.5M.

2. This drawing is subject to change without notice.

3. This dimension does not include mold flash, protrusions, or gate burrs. Mold flash, protrusions, or gate burrs shall not

exceed .006 [0.15] per side.

4. This dimension does not include interlead flash.

5. Reference JEDEC registration MS-012, variation AA.

.010 [0.25] C A B

PIN 1 ID AREA

SEATING PLANE

.004 [0.1] C

SEE DETAIL A

DETAIL A

TYPICAL

SCALE 2.800

Yl“‘+

www.ti.com

EXAMPLE BOARD LAYOUT

.0028 MAX

[0.07]

ALL AROUND

.0028 MIN

[0.07]

ALL AROUND

(.213)

[5.4]

6X (.050 )

[1.27]

8X (.061 )

[1.55]

8X (.024)

[0.6]

(R.002 ) TYP

[0.05]

SOIC - 1.75 mm max heightD0008A

SMALL OUTLINE INTEGRATED CIRCUIT

4214825/C 02/2019

NOTES: (continued)

6. Publication IPC-7351 may have alternate designs.

7. Solder mask tolerances between and around signal pads can vary based on board fabrication site.

METAL SOLDER MASK

OPENING

NON SOLDER MASK

DEFINED

SOLDER MASK DETAILS

EXPOSED

METAL

OPENING

SOLDER MASK METAL UNDER

SOLDER MASK

DEFINED

EXPOSED

METAL

LAND PATTERN EXAMPLE

EXPOSED METAL SHOWN

SCALE:8X

SYMM

SEE

DETAILS

SYMM

www.ti.com

EXAMPLE STENCIL DESIGN

8X (.061 )

[1.55]

8X (.024)

[0.6]

6X (.050 )

[1.27] (.213)

[5.4]

(R.002 ) TYP

[0.05]

SOIC - 1.75 mm max heightD0008A

SMALL OUTLINE INTEGRATED CIRCUIT

4214825/C 02/2019

NOTES: (continued)

8. Laser cutting apertures with trapezoidal walls and rounded corners may offer better paste release. IPC-7525 may have alternate

design recommendations.

9. Board assembly site may have different recommendations for stencil design.

SOLDER PASTE EXAMPLE

BASED ON .005 INCH [0.125 MM] THICK STENCIL

SCALE:8X

SYMM

MECHANICAL DATA DGK (S—PDSO—GS) PLASTIC SMALL—OUTLINE PACKAGE m1 WW“: {[0 VAX % j 3,010 I 4073329/E 05/06 NO'ES' A AH imec' dimensmrs c'e m m'hmeiers 5 Th: drawing is enmec: :e change within: nciice. Body icnqth Coos mi mciucc maid Hash, protrusions or we tms Mom 'iush, aromons, ov qaw burrs shaH m exceed 015 per end b Budy mm does not wcude inierieud ﬂasi‘ inieriead ‘iush s'mii 'mi exceed 050 pe' we : FuHs wiUHn JEDEC M0487 quulion AA, except 'vievieud ricer INSTRUMENTS w. (i. com

LAND PATTERN DATA DGK (37PD30708) PLASTIC SMALL OUTLINE PACKAGE Exampie Board Layout Exampie stencii Openings Based on a stencii thickness of .127mm L005inch), (See Nate 0) (,0 65) TYP ‘ Li 5 LLLLL L, pm ,,,,, PKG PKG "\ i i 4 — ----- i — ----- i D DU D i i ’ PKG PKG Q G . / Exampie , Non Soldermusk Deﬁned Pad i , , —\ L A ~/ ‘\ Example \ Spider Musk Opening / +1 1‘(0,45) ‘ (See Note E) t 1 (1,45) < ‘="" \pud="" geometry="" ’="" (see="" note="" c)="" \="" +ii¢="" (0,05)="" \="" ah="" around="" «="" ,="" \="" e="" ’="" i="" ‘\-=""> muss/A 11/13 NOTES: A. Ali iinear dimensions are in miilimeters. a. This drawing is subject ta change without natiee, C, Publication |PCi7351 is recommended ior alternate designsu a. Laser cutting apertures with trapezoidui walls and aisa rounding corners w‘iH oﬂer eetter paste veiease. Customers snouid Contact their board ussembiy site for stencii design recommendations. Rater tn IFS—7525 for other slenci'i recummendutions. Customers should Contact their tmurd fabrication site for solder musk tolerances between and around signal pads. .r'I {I TEXAS INSTRUMENTS www.li.com

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PCA9536 Datasheet by Texas Instruments

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