HCC4538B
HCF4538B
DUAL MONOSTABLE MULTIVIBRATOR
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RETRIGGERABLE/RESETTABLE
CAPABILITY
TRIGGER AND RESET PROPAGATION DELAYS INDEPENDENT OF RX, CX
TRIGGERING FROM LEADING OR TRAILING
EDGE
Q AND Q BUFFERED OUTPUTS AVAILABLE
SEPARATE RESETS
WIDE RANGE OF OUTPUT-PULSE WIDTHS
QUIESCENT CURRENT SPECIFIED TO 20V
FOR HCC DEVICE
5V, 10V, AND 15V PARAMETRIC RATINGS
SCHMITT TRIGGER INPUT ALLOWS UNLIMITER RISE AND FALL TIMES ON + TR AND
– TR INPUTS
INPUT CURRENT OF 100nA AT 18V AND 25°C
FOR HCC DEVICE
100% TESTED FOR QUIESCENT CURRENT
MEETS ALL REQUIREMENTS OF JEDEC TENTATIVE STANDARD N° 13A, ”STANDARD SPECIFICATIONS FOR DESCRIPTION OF ”B”
SERIES CMOS DEVICES”
EY
(Plastic Package)
F
(Ceramic Package)
M1
(Micro Package)
C1
(Chip Carrier)
ORDER CODES :
HCC4538BF
HCF4538BM1
HCF4538BEY
HCF4538BC1
DESCRIPTION
The HCC4538B (extended temperature range) and
HCF4538B (intermediate temperature range) are
monolithic integrated circuit, available in 16-lead
dual in-line plastic or-ceramic package and plastic
micro package. The HCC/HCF4538B dual precision
monostable multivibrator provides stable retriggerable/resettable one-shot operation for any fixedvoltage timing application. An external resistor (RX)
and an external capacitor (CX) control the timing and
accuracy for the circuit. Adjustment of RX and CX
provides a wide range of output pulse widths from
the Q and Q terminals. The time delay from trigger
input to output transition (trigger propagation delay)
and the time delay from reset input to output transition (reset propagation delay) are independent of RX
and CX. Precision control of output pulse widths is
achieved through linear CMOS techniques. Leading-edge-triggering (+ TR) and trailing-edge-triggering (– TR) inputs are provided for triggering from
either edge of an input pulse. An unused + TR input
should be tied to VSS. An unused – TR input should
be tied to VDD. A RESET (on low level) is provided
for immediate termination of the output pulse or to
September 1988
PIN CONNECTIONS
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