I2C Bus

I²C Bus Fundamentals

NXP Semiconductors

This tutorial will introduce the I²C bus, overview its hardware architecture, explain its communication waveforms, and step through the data transfer sequence. It will also explain the advantages of I²C and review the electrical specifications for the different I²Cmodes.

Related Parts

ImageManufacturer Part NumberDescriptionAvailable QuantityPrice
IC RTC CLOCK/CALENDAR I2C 20SOPCF2127AT/2YIC RTC CLOCK/CALENDAR I2C 20SO79 - Immediate$4.03View Details
IC RTC CLOCK/CALENDAR I2C 8SOPCF8563T/F4,118IC RTC CLOCK/CALENDAR I2C 8SO5263 - Immediate$1.18View Details
IC RTC CLOCK/CALENDAR I2C 8DIPPCF8583P/F5,112IC RTC CLOCK/CALENDAR I2C 8DIP0 - ImmediateSee Page for PricingView Details
IC RTC CLOCK/CALENDAR I2C 8SOPCF8583T/5,518IC RTC CLOCK/CALENDAR I2C 8SO0 - Immediate$2.78View Details
IC RTC CLOCK/CALENDAR I2C 8SOPCF8593T/1,118IC RTC CLOCK/CALENDAR I2C 8SO4657 - Immediate$2.88View Details
IC RTC CLK/CALENDAR I2C 8TSSOPPCA8565TS/1,118IC RTC CLK/CALENDAR I2C 8TSSOP595 - Immediate$1.63View Details
IC RTC CLK/CALENDAR I2C 10HVSONPCF8563BS/4,118IC RTC CLK/CALENDAR I2C 10HVSON13509 - Immediate$1.10View Details
IC RTC CLK/CALENDAR I2C 8TSSOPPCF8563TS/4,118IC RTC CLK/CALENDAR I2C 8TSSOP95 - Immediate$1.30View Details
IC RTC CLOCK/CALENDAR I2C 8SOPCF8563T/F4,112IC RTC CLOCK/CALENDAR I2C 8SO0 - ImmediateSee Page for PricingView Details
IC RTC CLK/CALENDAR I2C 14TSSOPPCF8523TS/1,112IC RTC CLK/CALENDAR I2C 14TSSOP0 - ImmediateSee Page for PricingView Details
IC RTC CLOCK/CALENDAR I2C 8SOPCF8523T/1,118IC RTC CLOCK/CALENDAR I2C 8SO15879 - Immediate$1.03View Details
IC RTC CLK/CALENDAR I2C 8HVSONPCF8523TK/1,118IC RTC CLK/CALENDAR I2C 8HVSON6045 - Immediate$1.19View Details
IC RTC CLK/CALENDAR I2C 14TSSOPPCF8523TS/1,118IC RTC CLK/CALENDAR I2C 14TSSOP22801 - Immediate$1.23View Details
IC RTC CLOCK/CALENDAR I2C 8SOPCF8563T/5,518IC RTC CLOCK/CALENDAR I2C 8SO18779 - Immediate$0.71View Details
IC RTC CLK/CALENDAR I2C 8TSSOPPCF8563TS/5,118IC RTC CLK/CALENDAR I2C 8TSSOP3952 - Immediate$0.99View Details
IC ADC/DAC 8BIT 11.1K 16DIPPCF8591P,112IC ADC/DAC 8BIT 11.1K 16DIP0 - ImmediateSee Page for PricingView Details
IC ADC/DAC 8BIT 11.1K 16SOPCF8591T/2,518IC ADC/DAC 8BIT 11.1K 16SO0 - Immediate$3.67View Details
IC ADC/DAC 8BIT 11.1K 16SOPCF8591T/2,512IC ADC/DAC 8BIT 11.1K 16SO0 - ImmediateSee Page for PricingView Details
IC CONTROLLER PARALLEL INTERFACEPCA9564D,112IC CONTROLLER PARALLEL INTERFACE0 - ImmediateSee Page for PricingView Details
IC CTRL PARALLEL/I2C BUS 20TSSOPPCA9564PW,112IC CTRL PARALLEL/I2C BUS 20TSSOP0 - ImmediateSee Page for PricingView Details
PTM Published on: 2011-06-22

Related Product Highlight

Voltage Level Translators NXP's voltage translators address the various applications that need a transition of I²C signals through multiple voltage domains without direct control.
DAC7571 Single-Channel 12-Bit DACs Texas Instruments offers the DAC7571 2.7 V to 5.5 V, I²C interface (receiver only), voltage output, 12-bit digital-to-analog converters.
TPS3808 Microprocessor Supervisory Circuits Texas Instruments' TPS3808 microprocessor supervisory circuit asserts a RESET signal when the SENSE pin voltage drops below VIT or the manual reset is driven low.

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Logic Level Shifting Basics Mainstay 5 V logic is joined by ever lower voltage standards like 3.3 V, 2.5 V, 1.8 V and lower, resulting in the need for mismatched systems to communicate.
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