74F189A View Datasheet(PDF) - Philips Electronics

Part Name

Description

MFG CO.

74F189A

64-bit TTL bipolar RAM, inverting (3-State)

Philips Electronics 

Philips Semiconductors

64-bit TTL bipolar RAM, inverting (3-State)

Product specification

74F189A

TEST CIRCUIT AND WAVEFORM

VIN

PULSE

GENERATOR

VCC

VOUT

D.U.T.

NEGATIVE

PULSE

90%

tw

VM

10%

tTHL (tf )

VM

10%

tTLH (tr )

90%

AMP (V)

0V

RT

CL RL

Test Circuit for Totem-Pole Outputs

POSITIVE

PULSE

10%

tTLH (tr )

90%

VM

tw

tTHL (tf )

90%

VM

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 Definition

family

74F

INPUT PULSE REQUIREMENTS

amplitude VM rep. rate

tw

tTLH

3.0V 1.5V 1MHz 500ns 2.5ns

tTHL

2.5ns

SF00006

1990 Feb 23

7

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