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PDF ( 数据手册 , 数据表 ) 54AC521

零件编号 54AC521
描述 8-Bit Identity Comparator
制造商 National Semiconductor
LOGO National Semiconductor LOGO 


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54AC521 数据手册, 描述, 功能
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September 1998
54AC521 54ACT521
8-Bit Identity Comparator
General Description
The AC/ACT521 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 IA = B also serves as an active LOW enable input.
Features
n ICC reduced by 50%
n Compares two 8-bit words in 6.5 ns typ
n Expandable to any word length
n Outputs source/sink 24 mA
n ACT521 has TTL-compatible inputs
n Standard microcircuit Drawing (SMD)
54AC521: 5962-90985
54ACT521: 5962-89793
Logic Symbols
Connection Diagram
Pin Assignment
for DIP and CERPACK
IEEE/IEC
DS100291-1
DS100291-2
Pin Assignment
for LCC
DS100291-4
DS100291-3
Pin Descriptions
Pin Names
A0–A7
B0–B7
TA = B
OA = B
Description
Word A Inputs
Word B Inputs
Expansion or Enable Input
Identity Output
FACTis a trademark of Fairchild Semiconductor Corporation.
© 1998 National Semiconductor Corporation DS100291
www.national.com







54AC521 pdf, 数据表
Physical Dimensions inches (millimeters) unless otherwise noted
20-Lead Ceramic Leadless Chip Carrier
Package Number E20A
www.national.com
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