HD74HC620, HD74HC623

Rev.2.00 Mar 30, 2006 page 8 of 11

HD74HC623

50 %

50 %

90 %

10 %

Waveform - A

Enable Input

GAB

Waveform - B

0 V

50 %

tf

10 %

90 %

50 %

tr

10 %

90 %

50 %

50 %

90 %

10 %

Waveform - A

Enable Input

GBA

Waveform - B

0 V

50 %

tf

10 %

90 %

50 %

tr

10 %

90 %

Notes : 1. Input waveform : PRR

2. Waveform - A is for an output with internal conditions such that the

output is low except when disabled by the output control.

3. Waveform - B is for an output with internal conditions such that the

output is high except when disabled by the output control.

4. The output are measured one at a time with one transition per measurement.