54FCT521 Datasheet, PDF (1/8 Pages) National Semiconductor (TI) – 8-Bit Identity Comparator

September 1998
54FCT521
8-Bit Identity Comparator
General Description
The ’FCT521 is an expandable 8-bit comparator. It com-
pares two words of up to eight bits each and provides a LOW
output when the two words match bit for bit. The expansion
input I_{A = B} also serves as an active LOW enable input.
Features
n Expandable to any word length
n Outputs sink capability of 32mA, source capability of 12
mA
n TTL input and output level compatible
n CMOS power consumption
n Standard microcircuit Drawing (SMD) 5962-8854301
Logic Symbols
Connection Diagram
Pin Assignment
for DIP and CERPACK
IEEE/IEC
DS100968-1
DS100968-2
Pin Assignment
for LCC
DS100968-4
DS100968-3
Pin Descriptions
Pin Names
A₀–A₇
B₀–B₇
T_A = _B
O_A = _B
Description
Word A Inputs
Word B Inputs
Expansion or Enable Input
Identity Output
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© 1998 National Semiconductor Corporation DS100968
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