74HCT Просмотр технического описания (PDF) - Philips Electronics

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производитель

74HCT

FAMILY SPECIFICATIONS HCMOS family characteristics

Philips Electronics 

Philips Semiconductors

HCMOS family characteristics

FAMILY SPECIFICATIONS

HCU TYPES

AC waveforms 74HCU

handbook, halfpage

INPUT

tr

tf

90%

50%

VCC

10%

tPHL

tPLH

GND

OUTPUT

90%

50%

10%

tTHL

tTLH

MGK564

Fig.1 Input rise and fall times, transition times and propagation delays for combinatorial logic ICs.

Test circuit for 74HCU

handbook, halfpage

VI

PULSE

GENERATOR

VCC

D.U.T

RT

VO

CL 50 pF

MGK565

CL = load capacitance including jig and probe capacitance

(see AC CHARACTERISTICS for values).

RT = termination resistance should be equal to the output impedance Zo of

the pulse generator.

Fig.2 Test circuit.

March 1988

9

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