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74AC521

Fairchild Semiconductor
Part Number 74AC521
Manufacturer Fairchild Semiconductor
Description 8-Bit Identity Comparator
Published Apr 3, 2005
Detailed Description www.DataSheet4U.com 74AC521 • 74ACT521 8-Bit Identity Comparator November 1988 Revised March 2005 74AC521 • 74ACT521 ...
Datasheet PDF File 74AC521 PDF File

74AC521
74AC521

Overview
www.
DataSheet4U.
com 74AC521 • 74ACT521 8-Bit Identity Comparator November 1988 Revised March 2005 74AC521 • 74ACT521 8-Bit Identity Comparator General Description The AC/ACT521 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 IA B also serves as an active LOW enable input.
Features s ICC reduced by 50% 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 ACT521 has TTL-compatible inputs Ordering Code: Order Number 74AC521SC 74AC521SJ 74AC521MTC 74AC521PC 74ACT521SC 74ACT521SJ 74ACT521MTC 74ACT521PC Package Number M20B M20D MTC20 N20A M20B M20D MTC20 N20A Package Description 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.
300" Wide Pb-Free 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.
3mm Wide 20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.
4mm Wide 20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.
300" Wide 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.
300" Wide Pb-Free 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.
3mm Wide 20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.
4mm 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 table.
Pb-Free package per JEDEC J-STD-020B.
Logic Symbols Connection Diagram IEEE/IEC Pin Descriptions Pin Names A0–A7 B0–B7 TA OA B B Description Word A Inputs Word B Inputs Expansion or Enable Input Identity Output FACT¥ is a trademark of Fairchild Semiconductor Corporation.
© 2005 Fairchild Semiconductor Corporation DS009964 www.
fairchildsemi.
com 74AC521 • 74ACT521 Truth Table Inputs IA L L H H H HIGH Voltage Level L LOW Voltage Level Note 1: A0 B0, A1 B1, A2 B2, etc.
Logic Diagram Outputs A, B A 2 B (Note 1) A zÃ7 A 2 B (Note 1...


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