HD74LS74AFPEL 查看數據表（PDF） - Renesas Electronics

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HD74LS74AFPEL

Dual J-K Flip-Flops(with Preset/ Common Clear/ and Common Clock)

Renesas Electronics 

HD74LS74A

Electrical Characteristics

(Ta = –20 to +75 °C)

Item

Symbol min. typ.* max. Unit

Condition

Input voltage

Output voltage

D

VIH

2.0

—

—

V

VIL

—

—

0.8

V

VOH

2.7

—

—

V

VCC = 4.75 V, VIH = 2 V, VIL = 0.8 V,

IOH = –400 µA

VOL

—

—

0.5

V

IOL = 8 mA VCC = 4.75 V, VIL = 0.8 V,

—

—

0.4

IOL = 4 mA VIH = 2 V

—

—

20

Clear

—

—

40

Preset

IIH

—

—

40

µA VCC = 5.25 V, VI = 2.7 V

Clock

—

—

20

D

—

—

–0.4

Input

Clear

—

—

–0.8

current Preset

IIL

—

—

–0.8

mA VCC = 5.25 V, VI = 0.4 V

Clock

—

—

–0.4

D

—

—

0.1

Clear

—

—

0.2

Preset

II

—

—

0.2

mA VCC = 5.25 V, VI = 7 V

Clock

—

—

0.1

Short-circuit output

current

IOS

–20

—

–100

mA VCC = 5.25 V

Supply current

ICC**

—

4

8

mA VCC = 5.25 V

Input clamp voltage

VIR

—

—

–1.5

V

VCC = 4.75 V, IIN = –18 mA

Notes: * VCC = 5 V, Ta = 25°C

** With all output open, ICC is measured with the Q and Q outputs high in turn. At the time of measurement, the

clock input is grounded.

Switching Characteristics

(VCC = 5 V, Ta = 25°C)

Item

Symbol

Inputs

Outputs min. typ. max. Unit

Condition

Maximum clock frequency

fmax

25

33

MHz

Propagation delay time

tPLH

Clear, Clock Q, Q

tPHL

or Preset

—

—

13

25

25

40

ns

CL = 15 pF,

RL = 2 kΩ

ns

Timing Definition

tw

Clock

Data

1.3 V

tsu

1.3 V

th

1.3 V

tsu

th

1.3 V

"H" Data

1.3 V

"L" Data

3V

0V

3V

1.3 V

0V

Rev.3.00, Jul.22.2005, page 3 of 7

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