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54ACT520
8-Bit Identity Comparator
General Description
The 鈥橝C/鈥橝CT520 are expandable 8-bit comparators. They
compare two words of up to eight bits each and provide a
LOW output when the two words match bit for bit. The ex-
pansion input I
A = B
also serves as an active LOW enable in-
put.
n
n
n
n
n
Expandable to any word length
20-pin package
Outputs source/sink 24 mA
鈥橝CT520 has TTL-compatible inputs
Standard Microcircuit Drawing (SMD)
54AC520: 5962-90916
54ACT520: 5962-89793
Features
n
Compares two 8-bit words in 6.5 ns typ
Logic Symbols
IEEE/IEC
DS100234-1
DS100234-4
Pin Names
A
0
鈥揂
7
B
0
鈥揃
7
T
A = B
O
A = B
Description
Word A Inputs
Word B Inputs
Expansion or Enable Input
Identity Output
FACT
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is a trademark of Fairchild Semiconductor Corporation.
漏 1998 National Semiconductor Corporation
DS100234
www.national.com
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