HCF4538 Datasheet

  • HCF4538

  • DUAL MONOSTABLE MULTIVIBRATOR

  • 306.44KB

  • STMicroelectronics   STMicroelectronics

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HCC4538B
HCF4538B
DUAL MONOSTABLE MULTIVIBRATOR
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RETRIGGERABLE/RESETTABLE
CAPABILITY
TRIGGER AND RESET PROPAGATION DE-
LAYS INDEPENDENT OF R
X
, C
X
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 UN-
LIMITER RISE AND FALL TIMES ON + TR AND
鈥?TR INPUTS
INPUT CURRENT OF 100nA AT 18V AND 25掳C
FOR HCC DEVICE
100% TESTED FOR QUIESCENT CURRENT
MEETS ALL REQUIREMENTS OF JEDEC TEN-
TATIVE STANDARD N掳 13A, 鈥漇TANDARD SPE-
CIFICATIONS FOR DESCRIPTION OF 鈥滲鈥?/div>
SERIES CMOS DEVICES鈥?/div>
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 retrigger-
able/resettable one-shot operation for any fixed-
voltage timing application. An external resistor (R
X
)
and an external capacitor (C
X
) control the timing and
accuracy for the circuit. Adjustment of R
X
and C
X
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 transi-
tion (reset propagation delay) are independent of R
X
and C
X
. Precision control of output pulse widths is
achieved through linear CMOS techniques. Lead-
ing-edge-triggering (+ TR) and trailing-edge-trigger-
ing (鈥?TR) inputs are provided for triggering from
either edge of an input pulse. An unused + TR input
should be tied to V
SS
. An unused 鈥?TR input should
be tied to V
DD
. A RESET (on low level) is provided
for immediate termination of the output pulse or to
September 1988
PIN CONNECTIONS
1/14

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