54F 74F521 8-Bit Identity Comparator
May 1995
54F 74F521
8-Bit Identity Comparator
General Description
The 鈥橣521 is an expandable 8-bit comparator It compares
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
e
B
also serves as an active LOW enable input
Features
Y
Y
Y
Compares two 8-bit words in 6 5 ns typ
Expandable to any word length
20-pin package
Commercial
74F521PC
Military
Package
Number
N20A
Package Description
20-Lead (0 300 Wide) Molded Dual-In-Line
20-Lead Ceramic Dual-In-Line
20-Lead (0 300 Wide) Molded Small Outline JEDEC
20-Lead (0 300 Wide) Molded Small Outline EIAJ
20-Lead Molded Shrink Small Outline EIAJ type II
54F521DM (Note 2)
74F521SC (Note 1)
74F521SJ (Note 1)
74F521MSA (Note 1)
J20A
M20B
M20D
MSA20
Note 1
Devices also available in 13 reel Use suffix
e
SCX SJX and MSAX
Note 2
Military grade device with environmental and burn-in processing Use suffix
e
DMQB
Logic Symbols
IEEE IEC
TL F 9545 鈥?1
TL F 9545 鈥?4
TRI-STATE is a registered trademark of National Semiconductor Corporation
C
1995 National Semiconductor Corporation
TL F 9545
RRD-B30M75 Printed in U S A