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
http://onsemi.com
MARKING
DIAGRAMS
16
PDIP−16
N SUFFIX
CASE 648
MC74HC4538AN
AWLYYWWG
16
external timing components, R and C . The device has a reset
x
x
1
function which forces the Q output low and the Q output high,
regardless of the state of the output pulse circuitry.
1
Features
16
SOIC−16
D SUFFIX
CASE 751B
• Unlimited Rise and Fall Times Allowed on the Trigger Inputs
• Output Pulse is Independent of the Trigger Pulse Width
HC4538AG
AWLYWW
16
1
•
10% Guaranteed Pulse Width Variation from Part to Part
(Using the Same Test Jig)
1
• 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 mA
• High Noise Immunity Characteristic of CMOS Devices
• In Compliance with the Requirements Defined by JEDEC Standard
No. 7A
16
TSSOP−16
DT SUFFIX
CASE 948F
HC45
38A
16
ALYWG
1
G
1
16
1
• Chip Complexity: 145 FETs or 36 Equivalent Gates
• Pb−Free Packages are Available*
SOEIAJ−16
F SUFFIX
CASE 966
16
74HC4538A
ALYWG
1
A
L, WL
Y, YY
= Assembly Location
= Wafer Lot
= Year
W, WW = Work Week
G
= Pb−Free Package
= Pb−Free Package
G
(Note: Microdot may be in either location)
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 2 of this data sheet.
*For additional information on our Pb−Free strategy and soldering details, please
download the ON Semiconductor Soldering and Mounting Techniques
Reference Manual, SOLDERRM/D.
©
Semiconductor Components Industries, LLC, 2005
1
Publication Order Number:
June, 2005 − Rev. 9
MC74HC4538A/D
ONSEMI [ ONSEMI ]
