© 1999 Fairchild Semiconductor Corporation

DS009556

www.fairchildsemi.com

April 1988

Revised August 1999

74F545

Octal Bidirectional Transceiver with 3-STATE Outputs

General Description

The 74F545 is an 8-bit, 3-STATE, high-speed transceiver. It

provides bidirectional drive for bus-oriented microproces-

sor and digital communications systems. Straight through

bidirectional transceivers are featured, with 24 mA bus

drive capability on the A Ports and 64 mA bus drive capa-

bility on the B Ports.

One input, Transmit/Receive (T/R) determines the direction

of logic signals through the bidirectional transceiver. Trans-

mit enables data from A-to-B Ports; Receive enables data

from B-to-A Ports. The Output Enable input disables both A

and B Ports by placing them in a 3-STATE condition.

Features

s Higher drive than 8304

s 8-bit bidirectional data flow reduces system package

count

s 3-STATE inputs/outputs for interfacing with bus-oriented

systems

s 24 mA and 64 mA bus drive capability on A and B Ports,

respectively

s Transmit/Receive and Output Enable simplify control

logic

s Guaranteed 4000V minimum ESD protection

Ordering Code:

Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.

Logic Symbols

IEEE/IEC

Connection Diagram

Order Number

Package Number

Package Description

74F545SC

M20B

20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide

74F545PC

N20A

20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide