HD74HC423A

Rev.2.00 Mar 30, 2006 page 2 of 8

Pin Arrangement

1

2

3

4

5

6

7

89

10

11

12

13

14

15

16

CLR

1Rext/Cext

1Cext

1Q

2Q

2CLR

2B

2A

CLR

1A

1B

2Q

2Cext

2Rext/Cect

GND

1CLR

1Q

(Top view)

Logic Diagram (1/2)

Rext Cext

A

B

CLR

To Another

Transceiver

OUT

CK

Q

Q

CLR

CK

Absolute Maximum Ratings

Item

Symbol

Ratings

Unit

Supply voltage range

–0.5 to 7.0

V

Input / Output voltage

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.