74HC221 datasheet(9/15 Pages) PHILIPS

9 / 15 page

December 1990

Philips Semiconductors

Product speciﬁcation

Dual non-retriggerable monostable

multivibrator with reset

74HC/HCT221

AC CHARACTERISTICS FOR 74HCT

GND = 0 V; tr =tf = 6 ns; CL = 50 pF

SYMBOL

PARAMETER

Tamb (°C)

UNIT

TEST CONDITIONS

74HCT

VCC

(V)

WAVEFORMS

+25

−40 to +85 −40 to +125

min

typ max min max.

min.

max.

tPLH

propagation delay (trigger)

nA, nRD to nQ

4.5

CEXT = 0 pF;

REXT =5 kΩ;

Fig.10

tPLH

propagation delay (trigger)

nB to nQ

4.5

CEXT = 0 pF;

REXT =5 kΩ;

Fig.10

tPHL

propagation delay (trigger)

nA to nQ

4.5

CEXT = 0 pF;

REXT =5 kΩ;

Fig.10

tPHL

propagation delay (trigger)

nB to nQ

4.5

CEXT = 0 pF;

REXT =5 kΩ;

Fig.10

tPHL

propagation delay (trigger)

nRD to nQ

4.5

CEXT = 0 pF;

REXT =5 kΩ;

Fig.10

tPHL

propagation delay (reset)

nRD to nQ

4.5

CEXT = 0 pF;

REXT =5 kΩ;

Fig.11

tPLH

propagation delay (reset)

nRD to nQ

4.5

CEXT = 0 pF;

REXT =5 kΩ;

Fig.11

tTHL/ tTLH output transition time

4.5

Fig.10

trigger pulse width

nA = LOW

4.5

Fig.10

trigger pulse width

nB = HIGH

4.5

Fig.10

pulse width

nRD = LOW

4.5

Fig.8

output pulse width

nQ = LOW

nQ = HIGH

630

700 770

602

798

595

805

µs

5.0

CEXT = 100 nF;

REXT = 10 kΩ;

Fig.10

trigger pulse width

nQ or nQ

140

−−

4.5

CEXT = 28 pF;

REXT =2 kΩ;

Fig.10

trigger pulse width

nQ or nQ

1.5

−−

µs

4.5

CEXT = 1 nF;

REXT = 2 kΩ;

Fig.10

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