SN74LS74A

3

DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified)

Limits

Symbol

Parameter

Min

Typ

Max

Unit

Test Conditions

VIH

Input HIGH Voltage

2.0

V

Guaranteed Input HIGH Voltage for

All Inputs

VIL

Input LOW Voltage

0.8

V

Guaranteed Input LOW Voltage for

All Inputs

VIK

Input Clamp Diode Voltage

– 0.65

– 1.5

V

VCC = MIN, IIN = – 18 mA

VOH

Output HIGH Voltage

2.7

3.5

V

VCC = MIN, IOH = MAX, VIN = VIH

or VIL per Truth Table

VO

Output LOW Voltage

0.25

0.4

V

IOL = 4.0 mA

VCC = VCC MIN,

VIN =VIL or VIH

VOL

Output LOW Voltage

0.35

0.5

V

IOL = 8.0 mA

VIN = VIL or VIH

per Truth Table

IIH

Input High Current

Data, Clock

Set, Clear

20

40

µA

VCC = MAX, VIN = 2.7 V

IH

Data, Clock

Set, Clear

0.1

0.2

mA

VCC = MAX, VIN = 7.0 V

IIL

Input LOW Current

Data, Clock

Set, Clear

– 0.4

– 0.8

mA

VCC = MAX, VIN = 0.4 V

IOS

Output Short Circuit Current (Note 1)

–20

–100

mA

VCC = MAX

ICC

Power Supply Current

8.0

mA

VCC = MAX

Note 1: Not more than one output should be shorted at a time, nor for more than 1 second.

AC CHARACTERISTICS (TA = 25°C, VCC = 5.0 V)

Limits

Symbol

Parameter

Min

Typ

Max

Unit

Test Conditions

fMAX

Maximum Clock Frequency

25

33

MHz

Figure 1

V

50 V

tPLH

Clock Clear Set to Output

13

25

ns

Figure 1

VCC = 5.0 V

CL = 15 pF

PLH

tPHL

Clock, Clear, Set to Output

25

40

ns

Figure 1

CL = 15 F

AC SETUP REQUIREMENTS (TA = 25°C)

Limits

Symbol

Parameter

Min

Typ

Max

Unit

Test Conditions

tW(H)

Clock

25

ns

Figure 1

tW(L)

Clear, Set

25

ns

Figure 2

t

Data Setup Time — HIGH

20

ns

Figure 1

VCC = 5.0 V

ts

Data Setup Time — LOW

20

ns

Figure 1

th

Hold Time

5.0

ns

Figure 1

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