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Hitachi - Dual Precision Retriggerable/Resettable Monostable Multivibrators

Numéro de référence 74HC4538
Description Dual Precision Retriggerable/Resettable Monostable Multivibrators
Fabricant Hitachi 
Logo Hitachi 





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74HC4538 fiche technique
HD74HC4538
Dual Precision Retriggerable/Resettable Monostable
Multivibrators
Description
Each multivibrator features both a negative, A, and a positive, B, transition triggered input, either of which
can be used as an inhibit input. Also included is a clear input that when taken low resets the one short. The
HD74HC4538 is retriggerable. That is, it may be triggered repeatedly while their outputs are generating a
pulse and the pulse will be extended.
Pulse width stability over a wide range of temperature. The output pulse equation is simply: tw = 0.7 (R)
(C).
Features
High Speed Operation: tpd (A or B to Y) = 22 ns typ (CL = 50 pF)
High Output Current: Fanout of 10 LSTTL Loads
Wide Operating Voltage: VCC = 2 to 6 V
Low Input Current: 1 µA max
Low Quiescent Supply Current
Function Table
Inputs
Outputs
CD A B Q Q
LX X L H
HL
HH
HH
Not triggered
H L Not triggered
X : Irrelevant

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