S

54AC11521, 74AC11521

8-BIT IDENTITY COMPARATORS

SCAS022A – D2957, JULY 1987 – REVISED APRIL 1993

POST OFFICE BOX 655303

2–3

recommended operating conditions

54AC11521

74AC11521

UNIT

MIN

NOM

MAX

MIN

NOM

MAX

UNIT

VCC

Supply voltage

3

5

5.5

3

5

5.5

V

VCC = 3 V

2.1

2.1

VIH

High-level input voltage

VCC = 4.5 V

3.15

3.15

V

VCC = 5.5 V

3.85

3.85

VCC = 3 V

0.9

0.9

VIL

Low-level input voltage

VCC = 4.5 V

1.35

1.35

V

VCC = 5.5 V

1.65

1.65

VI

Input voltage

0

VCC

0

VCC

V

VO

Output voltage

0

VCC

0

VCC

V

VCC = 3 V

–4

–4

IOH

High-level output current

VCC = 4.5 V

–24

–24

mA

VCC = 5.5 V

–24

–24

VCC = 3 V

12

12

IOL

Low-level output current

VCC = 4.5 V

24

24

mA

VCC = 5.5 V

24

24

D t/D v

Input transition rise or fall rate

0

10

0

10

ns / V

TA

Operating free-air temperature

–55

125

–40

85

°C

electrical characteristics over recommended operating free-air temperature range (unless

otherwise noted)

PARAMETER

TEST CONDITIONS

VCC

TA = 25°C

54AC11521

74AC11521

UNIT

PARAMETER

TEST CONDITIONS

VCC

MIN

TYP

MAX

MIN

MAX

MIN

MAX

UNIT

3 V

2.9

2.9

2.9

IOH = – 50 mA

4.5 V

4.4

4.4

4.4

5.5 V

5.4

5.4

5.4

V

IOH = – 4 mA

3 V

2.58

2.4

2.48

V

VOH

IOH

4.5 V

3.94

3.7

3.8

V

IOH = – 24 mA

5.5 V

4.94

4.7

4.8

IOH = – 50 mA{

5.5 V

3.85

IOH = – 75 mA{

5.5 V

3.85

3 V

0.1

0.1

0.1

IOL = 50 mA

4.5 V

0.1

0.1

0.1

5.5 V

0.1

0.1

0.1

V

IOL = 12 mA

3 V

0.36

0.5

0.44

V

VOL

IOL

4.5 V

0.36

0.5

0.44

V

IOL = 24 mA

5.5 V

0.36

0.5

0.44

IOL = 50 mA{

5.5 V

1.65

IOL = 75 mA{

5.5 V

1.65

II

VI = VCC or GND

5.5 V

± 0.1

± 1

± 1

mA

ICC

VI = VCC or GND,

IO = 0

5.5 V

8

160

80

mA

Ci

VI = VCC or GND

5 V

4

pF

† Not more than one output should be tested at a time, and the duration of the test should not exceed 10 ms.