HD74LS191

Rev.2.00, Feb.18.2005, page 3 of 10

Block Diagram

Ripple

Clock

Max/Min

Output

Down/Up

Clock

Data

Input A

Enable G

Data

Input C

Data

Input B

Data

Input D

Load

Clear

Preset

CK

K

Clear

Preset

CK

K

Clear

Preset

CK

K

Clear

Preset

CK

K

Absolute Maximum Ratings

Item

Symbol

Ratings

Unit

Supply voltage

7

V

Input voltage

7

V

Power dissipation

400

mW

Storage temperature

Tstg

–65 to +150

°C

Note:

Voltage value, unless otherwise noted, are with respect to network ground terminal.