HD74LS191 查看數據表（PDF） - Renesas Electronics

零件编号

产品描述 (功能)

比赛名单

HD74LS191

Synchronous Up / Down 4-bit Binary Counter (single clock line)

Renesas Electronics 

HD74LS191

Waveforms 4

Clock→Q

Load

Data

(A to D)

Down/Up

Clock

Q

Enable = 0V

Waveforms 5

Clock→Max / Min

Load

A

Inputs

B, C, D

Down/Up

Clock

Max/Min

Enable = 0V

1.3V

1.3V

tPLH

3V

0V

3V

0V

3V

0V

3V

1.3V

0V

1.3V

tPHL

VOH

VOL

3V

0V

3V

0V

3V

0V

3V

0V

1.3V

1.3V

3V

1.3V

1.3V

0V

1.3V

1.3V

1.3V

1.3V

tPLH

tPHL

tPLH

tPHL

VOH

VOL

Rev.2.00, Feb.18.2005, page 9 of 10

Share Link: