Philips Semiconductors

Product specification

74F841/74F842/74F843/

74F845/74F846

Bus interface latches

1999 Jun 23

14

AC WAVEFORMS

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

Dn, LE

Qn

SF01303

Waveform 1.

Propagation Delay, Non-Inverting Path

Dn, LE

Qn

SF01304

Waveform 2.

Propagation Delay, Inverting Path

LE

PRE,

MR

tw(L)

Qn, Qn

Qn, Qn

SF01305

Waveform 3.

Master Reset and Preset Pulse Width,

Master Reset and Preset to Output Delay,

and Master Reset and Preset to Latch Enable Recovery Time

th(H)

ts(H)

LE

th(L)

ts(L)

Dn

tw(H)

SF01306

Waveform 4.

Data Setup and Hold Times

VM

VM

VM

tPHZ

tPZH

OEn

VOH -0.3V

0V

Qn, Qn

SF00509

Waveform 5.

3-State Output Enable Time to High Level

and Output Disable Time from High Level

VM

VM

VM

tPLZ

tPZL

VOL +0.3V

3.5V

OEn

Qn, Qn

SF00510

Waveform 6.

3-State Output Enable Time to Low Level

and Output Disable time from Low Level