HD74LS190

Rev.3.00, Jul.15.2005, page 9 of 10

Waveforms 4

Clock

→Q

Load

Data

Down/Up

Clock

Q

Enable = 0V

1.3V

1.3V

1.3V

1.3V

0V

3V

0V

3V

0V

3V

0V

3V

Notes:

1.

data input D is shown by the dashed line.

2.

and C are held at the low logic level.

Waveforms 5

Clock

→Max / Min

Load

Inputs

A

B, C, D

Down/Up

Clock

Max/Min

Enable = 0V

1.3V

1.3V

1.3V

1.3V

0V

3V

0V

3V

0V

3V

0V

3V

0V

3V

1.3V

1.3V

1.3V

1.3V

Note:

Data inputs B and C are shown by the dashed line. Data input D is shown by the solid line.