© 1999 Fairchild Semiconductor Corporation DS009556 www.fairchildsemi.com
April 1988
Revised August 1999
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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
a73 Higher drive than 8304
a73 8-bit bidirectional data flow reduces system package
count
a73 3-STATE inputs/outputs for interfacing with bus-oriented
systems
a73 24 mA and 64 mA bus drive capability on A and B Ports,
respectively
a73 Transmit/Receive and Output Enable simplify control
logic
a73 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