SN54AC74, SN74AC74

DUAL POSITIVEEDGETRIGGERED DTYPE FLIPFLOPS

WITH CLEAR AND PRESET

SCAS521F − AUGUST 1995 − REVISED OCTOBER 2003

4

POST OFFICE BOX 655303

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

otherwise noted)

PARAMETER

TEST CONDITIONS

VCC

TA = 25°C

SN54AC74

SN74AC74

UNIT

PARAMETER

TEST CONDITIONS

VCC

MIN

TYP

MAX

MIN

MAX

MIN

MAX

UNIT

3 V

2.9

4.49

2.9

2.9

IOH = −50 µA

4.5 V

4.4

5.49

4.4

4.4

IOH = −50 µA

5.5 V

5.4

5.49

5.4

5.4

VOH

IOH = −12 mA

3 V

2.56

2.4

2.46

V

VOH

IOH = −24 mA

4.5 V

3.86

3.7

3.76

V

IOH = −24 mA

5.5 V

4.86

4.7

4.76

IOH = −50 mA†

5.5 V

3.85

IOH = −75 mA†

5.5 V

3.85

3 V

0.002

0.1

0.1

0.1

IOL = 50 µA

4.5 V

0.001

0.1

0.1

0.1

IOL = 50 µA

5.5 V

0.001

0.1

0.1

0.1

VOL

IOL = 12 mA

3 V

0.36

0.5

0.44

V

VOL

IOL = 24 mA

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

Data pins

VI = VCC or GND

5.5 V

±0.1

±1

±1

A

II

Control pins

VI = VCC or GND

5.5 V

±0.1

±1

±1

µA

ICC

VI = VCC or GND,

IO = 0

5.5 V

2

40

20

µA

Ci

VI = VCC or GND

5 V

3

pF

† Not more than one output should be tested at a time, and the duration of the test should not exceed 2 ms.

timing requirements over recommended operating free-air temperature range,

TA = 25°C

SN54AC74

SN74AC74

UNIT

MIN

MAX

MIN

MAX

MIN

MAX

UNIT

fclock

Clock frequency

100

70

95

MHz

tw

Pulse duration

PRE or CLR low

5.5

8

7

ns

tw

Pulse duration

CLK

5.5

8

7

ns

tsu

Setup time, data before CLK

↑

Data

4

5

4.5

ns

tsu

Setup time, data before CLK

↑

PRE or CLR inactive

0

0.5

0

ns

th

Hold time, data after CLK

↑

0.5

0.5

0.5

ns