74HC221 datasheet(11/15 Pages) PHILIPS

Part #	74HC221

Description	Dual non-retriggerable monostable multivibrator with reset

PDF	15 Pages

Scroll/Zoom	100%

Manufacturer	PHILIPS [NXP Semiconductors]

Direct Link	http://www.nxp.com

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11 / 15 page

December 1990

Philips Semiconductors

Product speciﬁcation

Dual non-retriggerable monostable

multivibrator with reset

74HC/HCT221

AC WAVEFORMS

Fig.7 Output pulse control; nRD = HIGH.

Fig.8

Output pulse control using reset input nRD;

nA = LOW.

Fig.9

Waveforms showing the removal times;

nRD to nA or nB.

(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.11 Waveforms showing the reset to nQ and nQ

output propagation delays.

(1) HC

: VM =VM = 50%; VI = GND to VCC.

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

74HC221 Datasheet(PDF) 11 Page - NXP Semiconductors