HD74LS190FPEL 查看數據表（PDF） - Renesas Electronics

零件编号

产品描述 (功能)

比赛名单

HD74LS190FPEL

Synchronous Up / Down Decade Counter (signal clock line)

Renesas Electronics 

HD74LS190

Switching Characteristics

(VCC = 5 V, Ta = 25°C)

Item

Symbol Inputs

Outputs

min.

typ.

max.

Unit Condition

Maximum clock

frequency

ƒmax

Clock

QA, QB, QC, QD

20

25

—

MHz

tPLH

tPHL

—

Load

QA, QB, QC, QD

—

22

33

33

50

ns

tPLH

tPHL

A, B,

—

C, D

QA, QB, QC, QD

—

20

32

27

40

ns

tPLH

—

Clock

Ripple Clock

13

20

ns

tPHL

—

16

24

Propagation

delay time

tPLH

tPHL

—

Clock

QA, QB, QC, QD

—

16

24

24

36

ns

CL = 15 pF,

RL = 2 kΩ

tPLH

Clock

Max / Min

tPHL

—

28

42

ns

—

37

52

tPLH

Down /

Ripple Clock

—

30

45

ns

tPHL

Up

—

30

45

tPLH

Down /

Max / Min

tPHL

Up

—

21

33

ns

—

22

33

tPLH

Enable

Ripple Clock

—

21

33

ns

tPHL

—

22

33

Rev.3.00, Jul.15.2005, page 5 of 10

Share Link: