M74HC21

2/8

INPUT AND OUTPUT EQUIVALENT CIRCUIT

PIN DESCRIPTION

TRUTH TABLE

ABSOLUTE MAXIMUM RATINGS

Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is

not implied

(*) 500mW at 65

RECOMMENDED OPERATING CONDITIONS

PIN No

SYMBOL

NAME AND FUNCTION

1, 9

1A to 2A

Data Inputs

2, 10

1B to 2B

Data Inputs

3, 11

N.C.

Not Connected

4, 12

1C to 2C

Data Inputs

5, 13

1D to 2D

Data Inputs

6, 8

1Y to 2Y

Data Outputs

7

GND

Ground (0V)

14

Positive Supply Voltage

A

BCD

Y

L

XXX

L

XL

X

X

L

X

XLXL

XX

X

L

L

H

HHHH

Symbol

Parameter

Value

Unit

Supply Voltage

-0.5 to +7

V

DC Input Voltage

V

DC Output Voltage

V

DC Input Diode Current

± 20

mA

DC Output Diode Current

± 20

mA

DC Output Current

± 25

mA

± 50

mA

Power Dissipation

500(*)

mW

Storage Temperature

-65 to +150

°C

Lead Temperature (10 sec)

300

°C

Symbol

Parameter

Value

Unit

Supply Voltage

2 to 6

V

Input Voltage

V

Output Voltage

V

Operating Temperature

-55 to 125

°C

Input Rise and Fall Time

0 to 1000

ns

0 to 500

ns

0 to 400

ns