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54HC4538J/883

Description
Logic Circuit
Categorylogic    logic   
File Size200KB,9 Pages
Manufacturere2v technologies
Download Datasheet Parametric Compare View All

54HC4538J/883 Overview

Logic Circuit

54HC4538J/883 Parametric

Parameter NameAttribute value
Makere2v technologies
package instruction,
Reach Compliance Codecompliant
Base Number Matches1
MM54HC4538 MM74HC4538 Dual Retriggerable Monostable Multivibrator
January 1988
MM54HC4538 MM74HC4538 Dual
Retriggerable Monostable Multivibrator
General Description
The MM54HC4538 MM74HC4538 high speed monostable
multivibrators (one shots) are implemented in advanced sili-
con-gate CMOS technology They feature speeds compara-
ble to low power Schottky TTL circuitry while retaining the
low power and high noise immunity characteristic of CMOS
circuits
Each multivibrator features both a negative A and a posi-
tive 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 shot The ’HC4538 is retrig-
gerable That is it may be triggered repeatedly while their
outputs are generating a pulse and the pulse will be extend-
ed
Pulse width stability over a wide range of temperature and
supply is achieved using linear CMOS techniques The out-
put pulse equation is simply PW
e
0 7(R) (C) where PW is in
seconds R is in ohms and C is in farads This device is pin
compatible with the CD4528 and the CD4538 one shots All
inputs are protected from damage due to static discharge by
diodes to Vcc and ground
Features
Y
Y
Y
Y
Y
Schmitt trigger on A and B inputs
Wide power supply range 2 – 6V
Typical trigger propagation delay 32 ns
Fanout of 10 LS-TTL loads (74HC)
Low input current 1
mA
max
Connection and Block Diagrams
Dual-In-Line Package
TL F 5217 – 1
Order Number MM54HC4538 or MM74HC4538
Truth Table
Inpu
Clear
L
X
X
H
H
ts
A
X
H
X
L
B
X
X
L
Q
L
L
L
Outputs
Q
H
H
H
TL F 5217 – 2
Note
Pin 1 and Pin 15 must be hard-wired to GND
v
H
e
One High Level Pulse
e
One Low Level Pulse
u
H
e
High Level
L
e
Low Level
e
Transition from Low to High
e
Transition from High to Low
u
v
X
e
Irrelevant
C
1995 National Semiconductor Corporation
TL F 5217
RRD-B30M105 Printed in U S A

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Reach Compliance Code compliant compliant
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