HD74HC42

Rev.2.00, Oct 06, 2005 page 2 of 7

Pin Arrangement

1

2

3

4

5

6

7

8

0

1

2

3

4

5

6

7

8

9

A

B

C

D

(Top view)

0Y

1Y

2Y

3Y

4Y

5Y

6Y

GND

16

15

14

13

12

11

10

9

A

B

C

D

9Y

8Y

7Y

Logic Diagram

A

0Y

1Y

2Y

3Y

4Y

5Y

6Y

7Y

8Y

9Y

B

C

D

Absolute Maximum Ratings

Item

Symbol

Ratings

Unit

Supply voltage range

–0.5 to 7.0

V

Input / Output voltage

Vin, Vout

V

Input / Output diode current

±20

mA

Output current

±25

mA

±50

mA

Power dissipation

500

mW

Storage temperature

Tstg

–65 to +150

°C

Note:

The absolute maximum ratings are values, which must not individually be exceeded, and furthermore, no two of

which may be realized at the same time.