74HC/HCT4538 데이터 시트보기 (PDF) - Philips Electronics

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74HC/HCT4538

Dual retriggerable precision monostable multivibrator

Philips Electronics 

Philips Semiconductors

Dual retriggerable precision monostable

multivibrator

Product specification

74HC/HCT4538

NON-STANDARD DC CHARACTERISTICS FOR 74HCT

Voltages are referenced to GND (ground = 0 V)

Tamb (°C)

TEST CONDITIONS

SYMBOL

PARAMETER

74HCT

+25

−40 to +85

−40 to +125

UNIT

VCC

(V)

VI

(V)

min. typ max. min. max. min. max.

OTHER

±II

input leakage current

nRCEXT

0.5

5.0

10.0 µA

5.5 2.0 VCC or GND;

or note 1

GND

Note

1. This measurement can only be carried out after a trigger pulse is applied.

AC WAVEFORMS

(1) HC : VM = 50%; VI = GND to VCC.

HCT: VM = 1.3 V; VI = GND to 3 V.

Fig.8 Waveforms showing the input (nA1, nA0, nRD) to output (nQ, nQ) propagation delays, the output transition

times, the input and output pulse widths, the removal time from direct reset (nRD) to input (nA1, nA0), and

the input retrigger time.

September 1993

9

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