74F670 データシートの表示（PDF） - Philips Electronics

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74F670

4 x 4 register file (3-State)

Philips Electronics 

Philips Semiconductors

4 x 4 register file (3-State)

Product specification

74F670

AC WAVEFORMS

For all waveforms, VM=1.5V.

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

Dn

VM

Dn

VM

WE

tPLH

VM

tPHL

Qn

VM

VM

SF01182

Waveform 1. Propagation Delay, Write Enable

and Data to Outptus

WE

tPHL

VM

tPLH

Qn

VM

VM

SF01183

Waveform 2. Propagation Delay, Write Enable

and Data to Outputs

WA, WB

VM

VM

ts

th

Dn

VM

VM

ts

th

tw(L)

WE

VM

VM

SF01184

Waveform 3. Setup and Hold Times for Write Address to Write

Enable and Data to Write Enable

RA, RB

VM

tPHL

VM

VM

tPLH

Qn

VM

VM

tPLH

tPHL

Qn

VM

VM

SF01185

Waveform 4. Propagation Delays for Read Address to Output

RE

VM

VM

tPZH

tPHZ

Qn

VM

VOH -0.3V

0V

SF01186

Waveform 5. 3-State Output Enable Time to High Level and

Output Disable Time from High Level

RE

VM

VM

tPZL

tPLZ

Qn

VM

VOL +0.3V

SF01187

Waveform 6. 3-State Output Enable Time to Low Level and

Output Disable Time from Low Level

1990 Jul 12

7

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