Philips Semiconductors

Product specification

74F256

Dual addressable latch

1988 Nov 29

7

AC WAVEFORMS

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

E

SF00809

Waveform 1. Propagation Delay,

Enable Input to Output, Enable Pulse Width

Qn

Dn

SF00810

Waveform 2. Propagation Delay,

Data to Output

Qn

An

SF00811

Waveform 3. Propagation Delay Address to Output

VM

tPHL

Qn

MR

SF00812

VM

VM

Waveform 4. Master Reset Pulse Width and

Master Reset to Output Delay

VM

VM

VM

VM

VM

VM

ts(L)

th(L)

ts(H)

th(H)

Dn

Qn

SF00813

E

Q=D

Q=D

Waveform 5. Data Setup and Hold Times

An

E

SF00814

Address Stable

Waveform 6. Address Setup and Hold Times