74ACT521SJX

74ACT521SJX Datasheet


74AC521<br>• 74ACT521 8-Bit Identity Comparator

Part Datasheet
74ACT521SJX 74ACT521SJX 74ACT521SJX (pdf)
Related Parts Information
74ACT521PC 74ACT521PC 74ACT521PC
74ACT521SCX 74ACT521SCX 74ACT521SCX
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74AC521SJX 74AC521SJX 74AC521SJX
74AC521SC 74AC521SC 74AC521SC
74AC521SCX 74AC521SCX 74AC521SCX
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74ACT521MTC 74ACT521MTC 74ACT521MTC
74ACT521MTCX 74ACT521MTCX 74ACT521MTCX
74ACT521SC 74ACT521SC 74ACT521SC
74AC521PC 74AC521PC 74AC521PC
PDF Datasheet Preview
74AC521
• 74ACT521 8-Bit Identity Comparator
74AC521
• 74ACT521 8-Bit Identity Comparator

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.
s ICC reduced by 50% s Compares two 8-bit words in 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 Package Number

Package Description
74AC521SC

M20B
20-Lead Small Outline Integrated Circuit SOIC , JEDEC MS-013, Wide
74AC521SJ

M20D
20-Lead Small Outline Package SOP , EIAJ TYPE II, 5.3mm Wide
74AC521MTC

MTC20
20-Lead Thin Shrink Small Outline Package TSSOP , JEDEC MO-153, 4.4mm Wide
74AC521PC

N20A
20-Lead Plastic Dual-In-Line Package PDIP , JEDEC MS-001, Wide
74ACT521SC

M20B
20-Lead Small Outline Integrated Circuit SOIC , JEDEC MS-013, Wide
74ACT521SJ

M20D
20-Lead Small Outline Package SOP , EIAJ TYPE II, 5.3mm Wide
74ACT521MTC

MTC20
20-Lead Thin Shrink Small Outline Package TSSOP , JEDEC MO-153, 4.4mm Wide
74ACT521PC

N20A
20-Lead Plastic Dual-In-Line Package PDIP , JEDEC MS-001, Wide
Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering table.

Logic Symbols

Connection Diagram

IEEE/IEC

Pin Descriptions

Pin Names TA = B OA = B

Description Word A Inputs Word B Inputs Expansion or Enable Input Identity Output
is a trademark of Fairchild Semiconductor Corporation.
2000 Fairchild Semiconductor Corporation DS009964
74AC521
• 74ACT521

Truth Table

Inputs

IA = B

A = B Note 1

A = B Note 1

H = HIGH Voltage Level L = LOW Voltage Level

Note 1 A0 = B0, A1 = B1, A2 = B2, etc.

Outputs

OA = B L H

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.

Ripple Expansion

Parallel Expansion
74AC521
• 74ACT521

Absolute Maximum Ratings Note 2

Supply Voltage VCC DC Input Diode Current IIK

VI = −0.5V VI = VCC + 0.5V DC Input Voltage VI DC Output Diode Current IOK VO = −0.5V VO = VCC + 0.5V DC Output Voltage VO DC Output Source
or Sink Current IO DC VCC or Ground Current
per Output Pin ICC or IGND Storage Temperature TSTG Junction Temperature TJ

PDIP
−0.5V to +7.0V
−20 mA +20 mA −0.5V to VCC + 0.5V
−20 mA +20 mA −0.5V to VCC + 0.5V
±50 mA
±50 mA −65°C to +150°C
140°C

Recommended Operating Conditions

Supply Voltage VCC AC
2.0V to 6.0V
4.5V to 5.5V

Input Voltage VI Output Voltage VO Operating Temperature TA Minimum Input Edge Rate
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Datasheet ID: 74ACT521SJX 513102