HD74LS641

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

Function Table

Enable

Direction Control

G

DIR

Operation

L

L

B data to A bus

L

H

A data to B bus

H

X

Isolation

Note:

H; high level, L; low level, X; irrelevant

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

Output voltage

—

—

5.5

V

Output current

—

—

24

mA

Operating temperature

Topr

–20

25

75

°C