MC74HC4538A
Dual Precision Monostable
Multivibrator (Retriggerable,
Resettable)
The MC74HC4538A is identical in pinout to the MC14538B. The
device inputs are compatible with standard CMOS outputs; with
pullup resistors, they are compatible with LSTTL outputs.
This dual monostable multivibrator may be triggered by either the
positive or the negative edge of an input pulse, and produces a
precision output pulse over a wide range of pulse widths. Because the
device has conditioned trigger inputs, there are no trigger–input rise
and fall time restrictions. The output pulse width is determined by the
external timing components, R
x
and C
x
. The device has a reset
function which forces the Q output low and the Q output high,
regardless of the state of the output pulse circuitry.
http://onsemi.com
MARKING
DIAGRAMS
16
1
16
MC74HC4538AN
AWLYYWW
1
•
Unlimited Rise and Fall Times Allowed on the Trigger Inputs
•
Output Pulse is Independent of the Trigger Pulse Width
•
±
10% Guaranteed Pulse Width Variation from Part to Part (Using
•
•
•
•
•
•
•
the Same Test Jig)
Output Drive Capability: 10 LSTTL Loads
Outputs Directly Interface to CMOS, NMOS and TTL
Operating Voltage Range: 3.0 to 6.0 V
Low Input Current: 1.0
µA
High Noise Immunity Characteristic of CMOS Devices
In Compliance with the Requirements Defined by JEDEC Standard
No. 7A
Chip Complexity: 145 FETs or 36 Equivalent Gates
16
PDIP–16
N SUFFIX
CASE 648
16
1
HC4538A
AWLYWW
1
SO–16
D SUFFIX
CASE 751B
16
1
16
HC
4538A
ALYW
1
GND
C
X
1/R
X
1
RESET 1
A1
B1
Q1
Q1
GND
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
V
CC
GND
C
X
2/R
X
2
RESET 2
A2
B2
Q2
Q2
TSSOP–16
DT SUFFIX
CASE 948F
A
L, WL
Y, YY
W, WW
= Assembly Location
= Wafer Lot
= Year
= Work Week
Figure 1. Pin Assignment
ORDERING INFORMATION
Device
MC74HC4538AN
MC74HC4538AD
MC74HC4538ADR2
MC74HC4538ADT
MC74HC4538ADTR2
Package
PDIP–16
SOIC–16
SOIC–16
TSSOP–16
TSSOP–16
Shipping
2000/Box
48/Rail
2500/Reel
96/Rail
2500/Reel
©
Semiconductor Components Industries, LLC, 2001
1
April, 2001 – Rev. 8
Publication Order Number:
MC74HC4538A/D
ONSEMI [ ON SEMICONDUCTOR ]
