74F620 查看數據表（PDF） - Philips Electronics

零件编号

产品描述 (功能)

比赛名单

74F620

Octal bus transceiver, inverting (3tate)

Philips Electronics 

Philips Semiconductors

Transceivers

Product specification

74F620/74F623

AC WAVEFORMS

For all waveforms, VM = 1.5V.

An or Bn

VM

tPHL

VM

tPLH

Bn or An

VM

VM

SF01131

Waveform 1. For Inverting Outputs

OEBA

OEAB

An or Bn

VM

tPZH

VM

tPHZ

VM

VOH -0.3V

0V

SF01133

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

Output Disable Time from High Level

An or Bn

VM

tPLH

VM

tPHL

Bn or An

VM

VM

SF01132

Waveform 2. For Non-Inverting Outputs

OEBA

OEAB

An or Bn

VM

tPZL

VM

tPLZ

VM

VOL +0.3V

SF01134

Waveform 4. 3-State Output Enable Time to Low Level and

Output Disable Time from Low Level

TEST CIRCUIT AND WAVEFORMS

VCC

VIN

PULSE

GENERATOR

VOUT

RL

D.U.T.

RT

CL RL

Test Circuit for 3-State Outputs

SWITCH POSITION

TEST

tPLZ

tPZL

All other

SWITCH

closed

closed

open

7.0V

90%

NEGATIVE

PULSE

POSITIVE

PULSE

10%

tw

VM

10%

tTHL (tf )

VM

10%

tTLH (tr )

tTLH (tr )

90%

VM

tw

tTHL (tf )

90%

VM

Input Pulse Definition

90%

AMP (V)

0V

AMP (V)

10%

0V

DEFINITIONS:

RL = Load resistor;

see AC electrical characteristics for value.

CL = Load capacitance includes jig and probe capacitance;

see AC electrical characteristics for value.

RT = Termination resistance should be equal to ZOUT of

pulse generators.

INPUT PULSE REQUIREMENTS

family

amplitude VM rep. rate

tw

tTLH

74F

3.0V 1.5V 1MHz 500ns 2.5ns

tTHL

2.5ns

SF00777

1990 Apr 6

8

Share Link: