Philips Semiconductors

Product specification

74ABT651

Octal transceiver/register, inverting (3-State)

1995 Sep 06

6

AC SETUP REQUIREMENTS

LIMITS

SYMBOL

PARAMETER

WAVEFORM

UNIT

Min

Typ

Min

Setup time

An to CPAB, Bn to CPBA

4

3.0

3.0

1.2

0.8

3.0

3.0

ns

Hold time

An to CPAB, Bn to CPBA

4

0.0

0.0

–0.8

–0.9

0.0

0.0

ns

Pulse width, High or Low

CPAB or CPBA

1

4.0

4.0

1.2

1.1

4.0

4.0

ns

AC WAVEFORMS

VM

VM

VM

VM

VM

1/fMAX

tw(H)

tw(L)

tPHL

tPLH

CPBA or

CPAB

An or Bn

SA00087

Waveform 1. Propagation Delay, Clock Input to Output, Clock

Pulse Width, and Maximum Clock Frequency

An or Bn

VM

VM

Bn or An

VM

VM

tPLH

tPHL

SA00016

Waveform 2. Propagation Delay, An to Bn or Bn to An

VM

tPHL

tPLH

VM

VM

VM

SBA or SAB

An or Bn

SA00089

Waveform 3. Propagation Delay, SBA to An or SAB to Bn

VM

An or Bn

VM

VM

VM

VM

VM

CPBA or

CPAB

ts(H)

th(H)

ts(L)

th(L)

SA00090

NOTE: The shaded areas indicate when the input is permitted

to change for predictable output performance.

Waveform 4. Data Setup and Hold Times

OEBA

VM

tPZH

tPHZ

0V

VOH –0.3V

VM

VM

An or Bn

OEAB

SA00100

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

Output Disable Time from High Level

tPZL

tPLZ

VOL +0.3V

VM

VM

VM

OEBA

An or Bn

OEAB

SA00101

0V

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

Output Disable Time from Low Level