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74F74

Dual D-type flip-flop

Philips Electronics 

Philips Semiconductors

Dual D-type flip-flop

Product specification

74F74

AC WAVEFORMS

For all waveforms, VM = 1.5V.

The shaded areas indicate when the input is permitted to

change for predictable output performance.

Dn

VM

VM

VM

VM

tsu(L) th(L)

tsu(H) th(H)

1/fmax

CPn

VM

VM

tw(L)

VM

tw(H)

tPLH

tPHL

Qn

VM

VM

tPHL

tPLH

Qn

VM

VM

SF01276

Waveform 1. Propagation delay for data to output, data setup

time and hold times, and clock width, and maximum clock

frequency

tw(L)

SDn VM

VM

RDn

tPLH

tw(L)

VM

VM

tPHL

Qn

VM

tPHL

VM

tPLH

Qn

VM

VM

SF00050

Waveform 2. Propagation delay for set and reset to output,

set and reset pulse width

SDn or RDn

VM

trec

CPn

VM

SF00051

Waveform 3. Recovery time for set or reset to clock

TEST CIRCUIT AND WAVEFORMS

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

1996 Mar 12

5

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