Philips Semiconductors

Product specification

74F269

8–bit bidirectional binary counter

1996 Jan 05

8

AC WAVEFORMS

The shaded areas indicate when the input is permitted to change for predictable output performance.

CP

TC

SF00791A

Waveform 1. Propagation Delay, Clock Input to Output,

Clock Pulse Width, and Maximum Clock Frequency

CET

TC

SF00792

Waveform 2. Propagation Delay,

CET Input to Terminal Count Output

U/D

TC

SF00793

Waveform 3. Propagation Delay, Up/Down Count Control Input

to Terminal Count Output

CP

Pn

PE

SF00844

Waveform 4. Parallel Data and Parallel Enable

Setup and Hold Times

CP

CET

CEP

COUNT

NO CHANGE

SF00842

Waveform 5. Count Enables Setup and Hold Times

CP

COUNT UP

COUNT DOWN

U/D

SF00839

Waveform 6. Up/Down Count Control Setup and Hold Times