74LVT646 データシートの表示（PDF） - Philips Electronics

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74LVT646

3.3V Octal bus transceiver/register (3-State)

Philips Electronics 

Philips Semiconductors

3.3V Octal bus transceiver/register (3-State)

Product specification

74LVT646

AC WAVEFORMS

VM = 1.5V, VIN = GND to 2.7V

CPBA or

CPAB

An or Bn

1/fMAX

1.5V

1.5V

tw(H)

tPHL

tw(L)

1.5V

1.5V

2.7V

0V

tPLH

VOH

1.5V

VOL

SV00050

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

Pulse Width, and Maximum Clock Frequency

SBA or SAB

An or Bn

VM

VM

tPLH

VM

tPHL

VM

2.7V

0V

VOH

VOL

SV00121

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

to Bn or Bn to An

ÉÉÉ ÉÉÉÉÉÉÉÉÉ An

ÉÉÉ ÉÉÉÉÉÉÉÉÉ or

1.5V 1.5V

ÉÉÉ ÉÉÉÉÉÉÉÉÉ Bn

1.5V 1.5V

2.7V

0V

ts(H)

th(H)

ts(L)

th(L)

CPBA

or

CPAB

1.5V

1.5V

2.7V

0V

NOTE: The shaded areas indicate when the input is permitted

to change for predictable output performance.

SV00123

Waveform 4. Data Setup and Hold Times

OE, DIR

DIR

An or Bn

1.5V

tPZH

1.5V

tPHZ

1.5V

2.7V

0V

VOH

VOH –0.3V

0V

SV00124

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

Output Disable Time from High Level

SBA or SAB

An or Bn

1.5V

1.5V

tPHL

1.5V

tPLH

1.5V

2.7V

0V

VOH

VOL

SV00122

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

OE, DIR

DIR

An or Bn

1.5V

1.5V

tPZL

tPLZ

1.5V

2.7V

0V

3V

VOL +0.3V

VOL

SV00125

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

Output Disable Time from Low Level

1998 Feb 19

8

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