54ACT11521, 74ACT11521

8BIT IDENTITY COMPARATORS

SCAS023A − D2957, JULY 1978 − REVISED APRIL 1993

POST OFFICE BOX 655303

POST OFFICE BOX 1443

2−3

recommended operating conditions

54ACT11521

74ACT11521

UNIT

MIN

NOM

MAX

MIN

NOM

MAX

UNIT

VCC

Supply voltage

4.5

5

5.5

4.5

5

5.5

V

VIH

High-level input voltage

2

2

V

VIL

Low-level input voltage

0.8

0.8

V

VI

Input voltage

0

VCC

0

VCC

V

VO

Output voltage

0

VCC

0

VCC

V

IOH

High-level output current

−24

−24

mA

IOL

Low-level output current

24

24

mA

Dt/Dv

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

54ACT11521

74ACT11521

UNIT

PARAMETER

TEST CONDITIONS

VCC

MIN

TYP

MAX

MIN

MAX

MIN

MAX

UNIT

IOH = − 50 A

4.5 V

4.4

4.4

4.4

IOH = − 50 mA

5.5 V

5.4

5.4

5.4

VOH

IOH = − 24 mA

4.5 V

3.94

3.7

3.8

V

VOH

IOH = − 24 mA

5.5 V

4.94

4.7

4.8

V

IOH = − 50 mA{

5.5 V

3.85

IOH = − 75 mA{

5.5 V

3.85

IOL = 50 A

4.5 V

0.1

0.1

0.1

IOL = 50 mA

5.5 V

0.1

0.1

0.1

VOL

IOL = 24 mA

4.5 V

0.36

0.5

0.44

V

VOL

IOL = 24 mA

5.5 V

0.36

0.5

0.44

V

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

DICC}

One input at 3.4 V,

Other inputs at GND or VCC

5.5 V

0.9

1

1

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.

‡ This is the increase in supply current for each input that is at one of the specified TTL voltage levels rather than 0 V or VCC.

switching characteristics over recommended ranges of supply voltage and operating free-air

temperature (unless otherwise noted) (see Figure 1)

PARAMETER

FROM

TO

TA = 25°C

54ACT11521

74ACT11521

UNIT

PARAMETER

FROM

(INPUT)

TO

(OUTPUT)

MIN

TYP

MAX

MIN

MAX

MIN

MAX

UNIT

tPLH

P or Q

P = Q

1.5

8.8

13

1.5

15.9

1.5

14.7

ns

tPHL

P or Q

P = Q

1.5

8.2

12

1.5

14.6

1.5

13.6

ns

tPLH

G

P = Q

1.5

6.7

9.3

1.5

11.2

1.5

10.5

ns

tPHL

G

P = Q

1.5

6.8

8.8

1.5

10.2

1.5

9.7

ns