74221 데이터 시트보기 (PDF) - NXP Semiconductors.

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74221

Dual Monostable Multivibrators (with Schmitt Trigger Input)

NXP Semiconductors. 

Philips Semiconductors

Dual non-retriggerable monostable

multivibrator with reset

AC WAVEFORMS

Product specification

74HC/HCT221

Fig.7 Output pulse control; nRD = HIGH.

Fig.8 Output pulse control using reset input nRD;

nA = LOW.

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

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

Fig.10 Waveforms showing the triggering of One

Shot by input nA or input nB for one period

(tW) and minimum pulse widths of the trigger

inputs nA and nB.

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

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

Fig.9 Waveforms showing the removal times;

nRD to nA or nB.

December 1990

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

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

Fig.11 Waveforms showing the reset to nQ and nQ

output propagation delays.

11

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