HD74LS645

Rev.2.00, Feb.18.2005, page 2 of 6

Block Diagram

A

B

Direction

Control DIR

Transceiver (1/8)

Enable

G

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.

Recommended Operating Conditions

Item

Symbol

Min

Typ

Max

Unit

Supply voltage

4.75

5.00

5.25

V

—

—

–15

mA

Output current

—

—

24

mA

Operating temperature

Topr

–20

25

75

°C