Philips Semiconductors

Product specification

74F109

Postive J-K positive edge-triggered flip-flops

October 23, 1990

5

AC WAVEFORMS

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

VM

VM

CPn

VM

VM

VM

VM

VM

VM

tsu(H)

th(H)

Jn, Kn

Qn

VM

tw(H)

1/fmax

tsu(L)

th(L)

VM

VM

tPLH

Qn

tw(L)

tPHL

tPHL

tPLH

SF00139

Waveform 1. Propagation Delay for Data to Output, Data Setup

Time and Hold Times, and Clock Width,and Maximum

Clock Frequency

VM

VM

RDn

VM

Qn

VM

VM

VM

tPLH

Qn

tw(L)

tPHL

tPHL

tPLH

SDn

VM

VM

tw(L)

SF00050

Waveform 2. Propagation Delay for Set and Reset to Output,

Set and Reset Pulse Width

SDn or RDn

VM

VM

trec

CPn

SF00051

Waveform 3. Recovery Timer for Set or Reset to Clock