HD74HC4538
Dual Precision Retriggerable/Resettable Monostable Multivibrators
REJ03D0654-0200
(Previous ADE-205-543)
Rev.2.00
Mar 30, 2006
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
Ordering Information
Part Name
Package Type
HD74HC4538P
DILP-16 pin
HD74HC4538FPEL
SOP-16 pin (JEITA)
Package Code
(Previous Code)
PRDP0016AE-B
(DP-16FV)
PRSP0016DH-B
(FP-16DAV)
Package
Abbreviation
P
—
FP
EL (2,000 pcs/reel)
PRSP0016DG-A
RP
(FP-16DNV)
Note: Please consult the sales office for the above package availability.
HD74HC4538RPEL
Taping Abbreviation
(Quantity)
SOP-16 pin (JEDEC)
EL (2,500 pcs/reel)
Function Table
X :
CD
L
H
H
H
H
Irrelevant
Inputs
A
X
L
Outputs
B
X
Q
H
Q
L
H
H
Rev.2.00 Mar 30, 2006 page 1 of 13
L
Not triggered
Not triggered
