74F821 Ver la hoja de datos (PDF) - Philips Electronics

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74F821

Bus interface registers

Philips Electronics 

Philips Semiconductors

Bus interface registers

Product specification

74F821/822/823/824/825/826

AC WAVEFORMS

For all waveforms, VM = 1.5V.

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

1/fmax

CP VM

tw(H)

tPLH

VM

tw(L)

VM

tPHL

Qn

VM

tPHL

Qn

VM

VM

tPLH

VM

SF00506

Waveform 1. Propagation delay for clock input to output,

clock pulse width, and maximum clock frequency

MR

CP

Qn, Qn

VM

VM

tw(L)

tPHL

VM

trec

VM

SF00507

Waveform 2. Master reset pulse width, master reset to output

delay and master reset to clock recovery time

Dn, CE

CP

VM

VM

tsu(H) th(H)

VM

VM

tsu(L)

VM

th(L)

VM

SF00508

Waveform 3. Data setup time and hold times

OEn

Qn, Qn

VM

tPZH

VM

tPHZ

VM

VOH -0.3V

0V

SF00509

Waveform 4. 3-State output enable time to high level and

output disable time from high level

OEn

VM

VM

Qn, Qn

tPZL

tPLZ

VM

3.5V

VOL +0.3V

SF00510

Waveform 5. 3-State output enable time to low level and

output disable time from low level

1996 Jan 05

13

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