54FCT573
Octal D-Type Latch with TRI-STATE
®
Outputs
General Description
The ’FCT573 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 ’FCT373 but has
different pinouts.
Features
n Inputs and outputs on opposite sides of package allow
easy interface with microprocessors
n Useful as input or output port for microprocessors
n TTL input and output level compatible
n CMOS power consumption
n Functionally identical to ’FCT373
n TRI-STATE outputs for bus interfacing
n Output sink capability of 32 mA, source capability of
12 mA
n Standard Microcircuit Drawing (SMD) 5962-8863901
Ordering Code
Military Package Package Description
Number
54FCT573DMQB J20A 20-Lead Ceramic Dual-In-Line
54FCT573FMQB W20A 20-Lead Cerpack
54FCT573LMQB E20A 20-Lead Ceramic Leadless Chip Carrier, Type C
Connection Diagram
Pin
Names
Description
D
0
–D
7
Data Inputs
LE Latch Enable Input (Active HIGH)
OE TRI-STATE Output Enable Input
(Active LOW)
O
0
–O
7
TRI-STATE Latch Outputs
TRI-STATE
®
is a registered trademark of National Semiconductor Corporation.
Pin Assignment
for DIP and Cerpack
DS100951-1
Pin Assignment
for LCC
DS100951-39
August 1998
54FCT573
Octal
D-T
ype
Latch
with
TRI-ST
A
T
E
Outputs
© 1999 National Semiconductor Corporation DS100951 www.national.com