Dual monostable multivibrator
DESCRIPTION
The HEF4528B is a dual retriggerable-resettable
monostable multivibrator. Each multivibrator has an active
LOW input (I0), and active HIGH input (I1), an active LOW
clear direct input (CD), an output (O) and its complement
(O), and two pins for connecting the external timing
components (CTC
(1), RCTC).
An external timing capacitor (Ct ) must be connected
between CTC and RCTC and an external resistor (Rt) must
be connected between RCTC and VDD. The duration of the
(1) Always connected to ground.
output pulse is determined by the external timing
components Ct and Rt.
A HIGH to LOW transition on I0 when I1 is LOW or a LOW
to HIGH transition on I1 when I0 is HIGH produces a
positive pulse (LOW-HIGH-LOW) and O and a negative
pulse (HIGH-LOW-HIGH) on O if the CD is HIGH.
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