Philips Semiconductors

Product specification

74F191

Up/Down binary counter with reset and ripple clock

1995 Jul 17

9

AC WAVEFORMS

CP

SF00734

Waveform 1. Propagation Delay, Clock Input to Output,

Clock Pulse Width, and Maximum Clock Frequency.

SF00736

Waveform 3. Propagation Delay, Non-Inverting Path

CP

PL

SF00738

Waveform 5. Parallel Load Pulse Width, Parallel Load to Output

Delay and Parallel Load to Clock Recovery Time

CE, CP

U/D

RC

SF00735

Waveform 2. Propagation Delay, Clock, Clock Enable or

Up/Down to Ripple Clock Output

RC, TC

SF00737

Waveform 4. Propagation Delay, Inverting Path

The shaded areas indicate when the input is permitted

to change for predictable output performance.

PL

CP

SF00739

CE,

U/D

Waveform 6. Data Set Up and Hold Times