HD74HC91

Rev.2.00, Oct 06, 2005 page 2 of 5

Pin Arrangement

1

A

B

CK

Inputs

(Top View)

2

3

4

5

6

7

NC

NC

NC

NC

Vcc

NC

NC

A

B

GND

Clock

NC

14

13

12

11

10

9

8

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.

Recommended Operating Conditions

Item

Symbol

Ratings

Unit

Conditions

Supply voltage

2 to 6

V

Input / Output voltage

V

Operating temperature

Ta

–40 to 85

°C

0 to 1000

0 to 500

Input rise / fall time

*1

0 to 400

ns

Note:

1. This item guarantees maximum limit when one input switches.

Waveform: Refer to test circuit of switching characteristics.