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74AC520

Fairchild Semiconductor
Part Number 74AC520
Manufacturer Fairchild Semiconductor
Description 8-Bit Identity Comparator
Published Apr 3, 2005
Detailed Description 74AC520, 74ACT520 8-Bit Identity Comparator March 2007 74AC520, 74ACT520 8-Bit Identity Comparator Features ■ Compares...
Datasheet PDF File 74AC520 PDF File

74AC520
74AC520

Overview
74AC520, 74ACT520 8-Bit Identity Comparator March 2007 74AC520, 74ACT520 8-Bit Identity Comparator Features ■ Compares two 8-bit words in 6.
5ns typ.
■ Expandable to any word length ■ 20-pin package ■ Outputs source/sink 24mA ■ ACT520 has TTL-compatible inputs tm 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.
Ordering Information Order Number 74AC520SC 74ACT520SC 74ACT520SJ 74ACT520PC Package Number M20B M20B M20D N20A Package Description 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.
300” Wide Body 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.
300” Wide Body 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.
3mm Wide 20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.
300” Wide Device also available in Tape and Reel.
Specify by appending suffix letter “X” to the ordering number.
www.
DataSheet4U.
com Connection Diagram 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 Truth Table Inputs IA = B L L H H H = HIGH Voltage Level L = LOW Voltage Level Note: 1.
A0 = B0, A1 = B1, A2 = B2, etc.
Outputs A, B A= A= B(1) B(1) A≠B A≠B OA = B L H H H FACT™ is a trademark of Fairchild Semiconductor Corporation.
©1989 Fairchild Semiconductor Corporation 74AC520, 74ACT520 Rev.
1.
4 www.
fairchildsemi.
com 74AC520, 74ACT520 8-Bit Identity Comparator Logic Symbols IEEE/IEC Logic Diagram Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays.
©1989 Fairchild Semiconductor Corporation 74AC520, 74ACT520 Rev.
1.
4 www.
fairchildsemi.
com 2 74AC520, 74ACT520 8-Bit Identity Comparator Applications Ripple Expansion Parallel Expansion ©1989 Fairchild Semiconducto...


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