74221 datasheet(7/15 Pages) PHILIPS

Teilenummer	74221

Bauteilbeschribung	Dual non-retriggerable monostable multivibrator with reset

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Hersteller	PHILIPS [NXP Semiconductors]

Direct Link	http://www.nxp.com

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7 / 15 page

December 1990

7

Philips Semiconductors

Product speciﬁcation

Dual non-retriggerable monostable

multivibrator with reset

74HC/HCT221

tW

output pulse width

nQ or nQ

140

−−

ns

2.0

4.5

6.0

CEXT = 28 nF;

REXT =2 kΩ;

Fig.10

tW

output pulse width

nQ or nQ

1.5

−−

µs

2.0

4.5

6.0

CEXT = 1 nF;

REXT =2 kΩ;

Fig.10

tW

output pulse width

nQ or nQ

7

−−

µs

2.0

4.5

6.0

CEXT = 1 nF;

REXT = 10 kΩ;

Fig.10

tW

pulse width match

between circuits

in the package

± 2

−−

%

4.5

to

5.5

CEXT = 1000 pF;

REXT = 10 kΩ

trem

removal time

nRD to nA

or nB

100

20

17

30

11

9

125

25

21

150

30

26

ns

2.0

4.5

6.0

Fig.9

REXT

external timing resistor

10

2

1000

−

k

Ω

2.0

5.0

Fig.12

Fig.13

CEXT

external timing capacitor

no limits

pF

2.0

5.0

Fig.12

Fig.13

SYMBOL

PARAMETER

Tamb (°C)

UNIT

TEST CONDITIONS

74HC

VCC

(V)

WAVEFORMS

+25

−40 to +85 −40 to +125

min

typ

max. min

max.

min.

max.

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