HD74LS191 Просмотр технического описания (PDF) - Renesas Electronics

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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

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