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74AC520 Datasheet(PDF) 1 Page - Fairchild Semiconductor

No. de pieza 74AC520
Descripción Electrónicos  8-Bit Identity Comparator
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Fabricante Electrónico  FAIRCHILD [Fairchild Semiconductor]
Página de inicio  http://www.fairchildsemi.com
Logo FAIRCHILD - Fairchild Semiconductor

74AC520 Datasheet(HTML) 1 Page - Fairchild Semiconductor

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tm
March 2007
©1989 Fairchild Semiconductor Corporation
www.fairchildsemi.com
74AC520, 74ACT520 Rev. 1.4
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
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
Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering number.
Connection Diagram
Pin Descriptions
Truth Table
H
= HIGH Voltage Level
L
= LOW Voltage Level
Note:
1. A0 = B0, A1 = B1, A2 = B2, etc.
Order
Number
Package
Number
Package Description
74AC520SC
M20B
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300” Wide Body
74ACT520SC
M20B
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300” Wide 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, 0.300” Wide
Pin Names
Description
A0–A7
Word A Inputs
B0–B7
Word B Inputs
TA = B
Expansion or Enable Input
OA = B
Identity Output
Inputs
Outputs
IA = B
A, B
OA = B
LA
= B(1)
L
LA
≠ BH
HA
= B(1)
H
HA
≠ BH
FACT™ is a trademark of Fairchild Semiconductor Corporation
.


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