
MC74HC273A
www.onsemi.com
2
MAXIMUM RATINGS
Symbol Parameter Value Unit
VCC DC Supply Voltage (Referenced to GND) –0.5 to +7.0 V
Vin DC Input Voltage (Referenced to GND) –0.5 to VCC + 0.5 V
Vout DC Output Voltage (Referenced to GND) –0.5 to VCC + 0.5 V
Iin DC Input Current, per Pin ±20 mA
Iout DC Output Current, per Pin ±25 mA
ICC DC Supply Current, VCC and GND Pins ±50 mA
PDPower Dissipation in Still Air, SOIC Package†
TSSOP Package† 500
450 mW
Tstg Storage Temperature –65 to +150 °C
TLLead Temperature, 1 mm from Case for 10 Seconds
SOIC or TSSOP Package 260
°C
Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of
these limits are exceeded, device functionality should not be assumed, damage may occur and
reliability may be affected.
†Derating: SOIC Package: –7 mW/°C from 65° to 125°C
TSSOP Package: −6.1 mW/°C from 65° to 125°C
RECOMMENDED OPERATING CONDITIONS
Symbol Parameter Min Max Unit
VCC DC Supply Voltage (Referenced to GND) 2.0 6.0 V
Vin, Vout DC Input Voltage, Output Voltage (Referenced to GND) 0 VCC V
TAOperating Temperature, All Package Types –55 +125 °C
tr, tfInput Rise and Fall Time VCC = 2.0 V
(Figure 1) VCC = 4.5 V
VCC = 6.0 V
0
0
0
1000
500
400
ns
Functional operation above the stresses listed in the Recommended Operating Ranges is not implied. Extended exposure to stresses beyond
the Recommended Operating Ranges limits may affect device reliability.
DC ELECTRICAL CHARACTERISTICS (Voltages Referenced to GND)
Guaranteed Limit
Symbol Parameter Test Conditions VCC
V–55 to
25°Cv 85°Cv 125°C Unit
VIH Minimum High−Level Input Voltage Vout = VCC – 0.1 V
|Iout| v 20 mA2.0
3.0
4.5
6.0
1.5
2.1
3.15
4.2
1.5
2.1
3.15
4.2
1.5
2.1
3.15
4.2
V
VIL Maximum Low−Level Input Voltage Vout = 0.1 V
|Iout| v 20 mA2.0
3.0
4.5
6.0
0.5
0.9
1.35
1.8
0.5
0.9
1.35
1.8
0.5
0.9
1.35
1.8
V
VOH Minimum High−Level Output
Voltage Vin = VIH
|Iout| v 20 mA2.0
4.5
6.0
1.9
4.4
5.9
1.9
4.4
5.9
1.9
4.4
5.9
V
Vin = VIH |Iout| v 2.4 mA
|Iout| v 6.0 mA
|Iout| v 7.8 mA
3.0
4.5
6.0
2.48
3.98
5.48
2.34
3.84
5.34
2.2
3.7
5.2
VOL Maximum Low−Level Output
Voltage Vin = VIL
|Iout| v 20 mA2.0
4.5
6.0
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
V
Vin = VIL |Iout| v 2.4 mA
|Iout| v 6.0 mA
|Iout| v 7.8 mA
3.0
4.5
6.0
0.26
0.26
0.26
0.33
0.33
0.33
0.4
0.4
0.4
This device contains protection
circuitry to guard against damage
due to high static voltages or electric
fields. However, precautions must
be taken to avoid applications of any
voltage higher than maximum rated
voltages to this high−impedance cir-
cuit. For proper operation, Vin and
Vout should be constrained to the
range GND v (Vin or Vout) v VCC.
Unused inputs must always be
tied to an appropriate logic voltage
level (e.g., either GND or VCC).
Unused outputs must be left open.