N74F393D datasheet(5/8 Pages) PHILIPS

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Philips Semiconductors

Product specification

74F393

Dual 4-bit binary ripple counter

1988 Nov 01

AC SETUP REQUIREMENTS

LIMITS

SYMBOL

PARAMETER

TEST

CONDITION

VCC = +5V

Tamb = +25°C

CL = 50pF, RL = 500Ω

VCC = +5V ± 10%

Tamb = 0°C to +70°C

CL = 50pF, RL = 500Ω

UNIT

MIN

TYP

MAX

MIN

MAX

tW(H)

tW(L)

CPn Pulse width

High or Low

Waveform 1

4.5

3.5

5.0

4.0

tW(H)

MR Pulse width

High

Waveform 2

3.5

4.5

tREC

Recovery time

MR to CPn

Waveform 2

2.5

3.0

AC WAVEFORMS

For all waveforms, VM = 1.5V.

1/fMAX

tPHL

tw(L)

Qna, Qnb

tw(H)

CPn

tPLH

SF00709

Waveform 1.

Propagation Delay, Clock Input to Output,

Clock Pulse Width, and Maximum Clock Frequency

trec

tPHL

CPn

Qna, Qnb

tw(H)

SF00708

Waveform 2.

Master Reset Pulse Width, Master Reset to

Output Delay, and Master Reset to Clock Recovery Time

TEST CIRCUIT AND WAVEFORMS

90%

10%

90%

10%

90%

10%

90%

10%

NEGATIVE

PULSE

POSITIVE

PULSE

AMP (V)

tTHL (tf )

INPUT PULSE REQUIREMENTS

rep. rate

tTLH

tTHL

1MHz

500ns

2.5ns

Input Pulse Definition

VCC

family

74F

D.U.T.

PULSE

GENERATOR

VIN

VOUT

Test Circuit for Totem-Pole Outputs

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.

tTHL (tf )

tTLH (tr )

AMP (V)

amplitude

3.0V

1.5V

SF00006

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