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N74ALS161BN

4-bit binary counter

Philips Electronics 

Philips Semiconductors

4-bit binary counter

Product specification

74ALS161B/74ALS163B

TEST CIRCUIT AND WAVEFORMS

VIN

PULSE

GENERATOR

VCC

VOUT

D.U.T.

90%

NEGATIVE

PULSE

tw

VM

10%

tTHL (tff)

VM

10%

tTLH (tr )

90%

AMP (V)

0.3V

RT

CL RL

Test Circuit for Totem-pole Outputs

POSITIVE

PULSE

10%

tTLH (tr )

90%

VM

tw

tTHL (tf )

90%

VM

AMP (V)

10%

0.3V

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

INPUT PULSE REQUIREMENTS

Family

Amplitude VM Rep.Rate tw tTLH

74ALS 3.5V 1.3V 1MHz 500ns 2.0ns

tTHL

2.0ns

SC00005

1991 Feb 08

10

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