2

MILITARYANDCOMMERCIALTEMPERATURERANGES

IDT54/74FCT521/A/B/C

FAST CMOS 8-BIT IDENTITY COMPARATOR

INPUTS

OUTPUT

A, B

L

L

H

H

A = B*

A

≠ B

A = B*

A

≠ B

L

H

H

H

PIN DESCRIPTION

Pin Names

Description

Word A Inputs

Word B Inputs

Expansion or Enable Input (Active LOW)

Identity Output (Active LOW)

NOTE:

1. H = HIGH Voltage Level

L = LOW Voltage Level

*A0 = B0, A1 = B1, A2 = B2, etc.

PIN CONFIGURATION

CERDIP/ SOIC/ CERPACK

TOP VIEW

LCC

TOP VIEW

1

2

3

4

5

7

9

6

8

10

11

12

13

14

15

16

17

18

19

20

L20-2

IND EX

2

3

1

16

15

14

11

19

18

20

17

13

12

5

6

7

4

D20-1

SO20-2

E20-1

8

9

10

GND

Symbol

Rating

Commercial

Military

Unit

Terminal Voltage

with Respect to GND

–0.5 to +7

–0.5 to +7

V

Terminal Voltage

with Respect to GND

V

Operating Temperature

0 to +70

–55 to +125

°C

Temperature Under

Bias

–55 to +125

–65 to +135

°C

Storage Temperature

–55 to +125

–65 to +150

°C

Power Dissipation

0.5

0.5

W

DC Output Current

120

120

mA

8-link

NOTES:

1. Stresses greater than those listed under ABSOLUTE MAXIMUM

RATINGS may cause permanent damage to the device. This is a

stress rating only and functional operation of the device at these or

any other conditions above those indicated in the operational sections

of this specification is not implied. Exposure to absolute maximum

rating conditions for extended periods may affect reliability. No

3. Outputs and I/O terminals only.

Symbol

Conditions

Typ.

Max.

Unit

Input Capacitance

6

10

pF

Output

Capacitance

8

12

pF

8-link

NOTE:

1. This parameter is measured at characterization but not tested.