TL/F/9556
54F/74F545
Octal
Bidirectional
Transceiver
with
TRI-STATE
Outputs
May 1995
54F/74F545 Octal Bidirectional
Transceiver with TRI-STATE Outputs
General Description
The ’F545 is an 8-bit, TRI-STATE, high-speed transceiver. It
provides bidirectional drive for bus-oriented microprocessor
and digital communications systems. Straight through bidi-
rectional transceivers are featured, with 24 mA (20 mA Mil)
bus drive capability on the A ports and 64 mA (48 mA Mil)
bus drive capability 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 ports to B ports; Receive enables
data from B ports to A ports. The Output Enable input dis-
ables both A and B ports by placing them in a TRI-STATE
condition.
Features
Y
Higher drive than 8304
Y
8-bit bidirectional data flow reduces system package
count
Y
TRI-STATE inputs/outputs for interfacing with bus-ori-
ented systems
Y
24 mA (20 mA Mil) and 64 mA (48 mA Mil) bus drive
capability on A and B ports, respectively
Y
Transmit/Receive and Output Enable simplify control
logic
Y
Guaranteed 4000V minimum ESD protection
Y
Pin for Pin compatible with Intel 8286
Commercial Military
Package
Package Description
Number
74F545PC N20A 20-Lead (0.300 Wide) Molded Dual-In-Line
54F545DM (Note 2) J20A 20-Lead Ceramic Dual-In-Line
74F545SC (Note 1) M20B 20-Lead (0.300 Wide) Molded Small Outline, JEDEC
74F545SJ (Note 1) M20D 20-Lead (0.300 Wide) Molded Small Outline, EIAJ
54F545FM (Note 2) W20A 20-Lead Cerpack
54F545LM (Note 2) E20A 20-Lead Ceramic Leadless Chip Carrier, Type C
Note 1: Devices also available in 13 reel. Use suffix e SCX and SJX.
Note 2: Military grade device with environmental and burn-in processing. Use suffix e DMQB, FMQB and LMQB.
Logic Symbols
TL/F/9556–3
IEEE/IEC
TL/F/9556–5
TRI-STATE is a registered trademark of National Semiconductor Corporation.
C
1995 National Semiconductor Corporation RRD-B30M105/Printed in U. S. A.