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74AC520SC 반도체 회로 부품 판매점

8-Bit Identity Comparator



Fairchild Semiconductor 로고
Fairchild Semiconductor
74AC520SC 데이터시트, 핀배열, 회로
February 1989
Revised November 1999
74AC520 74ACT520
8-Bit Identity Comparator
General Description
The AC/ACT520 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
expansion input IA = B also serves as an active LOW enable
input.
Features
s Compares two 8-bit words in 6.5 ns typ
s Expandable to any word length
s 20-pin package
s Outputs source/sink 24 mA
s ACT520 has TTL-compatible inputs
Ordering Code:
Order Number Package Number
Package Description
74AC520SC
M20B
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300Wide Body
74AC520PC
N20A
20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300Wide
74ACT520SC
M20B
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300Wide Body
74ACT520SJ
M20D
20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
74ACT520PC
N20A
20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300Wide
Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code.
Logic Symbols
Connection Diagram
IEEE/IEC
Pin Descriptions
Pin Names
A0A7
B0B7
TA = B
OA = B
Description
Word A Inputs
Word B Inputs
Expansion or Enable Input
Identity Output
FACTis a trademark of Fairchild Semiconductor Corporation.
© 1999 Fairchild Semiconductor Corporation DS010194
www.fairchildsemi.com


74AC520SC 데이터시트, 핀배열, 회로
Truth Table
Inputs
IA = B
A, B
L A = B (Note 1)
L A≠Β
H A = B (Note 1)
H A≠Β
H = HIGH Voltage Level
L = LOW Voltage Level
Note 1: *A0 = B0, A1 = B1, A2 = B2, etc.
Outputs
OA = B
L
H
H
H
Logic Diagram
Applications
Please note that this diagram is provided only for the understanding of logic
operations and should not be used to estimate propagation delays.
Ripple Expansion
Parallel Expansion
www.fairchildsemi.com
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8-Bit Identity Comparator - Fairchild Semiconductor