July 1998
54ABT573
Octal D-Type Latch with TRI-STATE® Outputs
n Functionally identical to ’ABT373
n TRI-STATE outputs for bus interfacing
n Output sink capability of 48 mA, source capability of
24 mA
n Output switching specified for both 50 pF and 250 pF
loads
General Description
The ’ABT573 is an octal latch with buffered common Latch
Enable (LE) and buffered common Output Enable (OE) in-
puts.
This device is functionally identical to the ’ABT373 but has
different pinouts.
n Guaranteed latchup protection
n High impedance glitch-free bus loading during entire
power up and power down
n Nondestructive hot insertion capability
n Standard Microcircuit Drawing (SMD) 5962-9321901
Features
n Inputs and outputs on opposite sides of package allow
easy interface with microprocessors
n Useful as input or output port for microprocessors
Ordering Code
Military
Package
Number
Package Description
54ABT573J-QML
J20A
20-Lead Ceramic Dual-In-Line
20-Lead Cerpack
54ABT573W-QML
54ABT573E-QML
W20A
E20A
20-Lead Ceramic Leadless Chip Carrier, Type C
Connection Diagram
Pin Assignment
for LCC
Pin Assignment
for DIP and Cerpack
DS100219-39
Pin
Description
DS100219-1
Names
D0–D7
Data Inputs
LE
Latch Enable Input (Active HIGH)
TRI-STATE Output Enable Input
(Active LOW)
OE
O0–O7
TRI-STATE Latch Outputs
TRI-STATE® is a registered trademark of National Semiconductor Corporation.
© 1998 National Semiconductor Corporation
DS100219
www.national.com
NSC [ National Semiconductor ]
