MC74HC393A
Dual 4−Stage Binary Ripple
Counter
High−Performance Silicon−Gate CMOS
The MC74HC393A is identical in pinout to the LS393. The device
inputs are compatible with standard CMOS outputs; with pullup
resistors, they are compatible with LSTTL outputs.
This device consists of two independent 4−bit binary ripple counters
with parallel outputs from each counter stage. A ÷ 256 counter can be
obtained by cascading the two binary counters.
Internal flip−flops are triggered by high−to−low transitions of the
clock input. Reset for the counters is asynchronous and active−high.
State changes of the Q outputs do not occur simultaneously because of
internal ripple delays. Therefore, decoded output signals are subject to
decoding spikes and should not be used as clocks or as strobes except
when gated with the Clock of the HC393A.
http://onsemi.com
MARKING
DIAGRAMS
14
PDIP−14
N SUFFIX
CASE 646
14
1
1
14
Features
•
•
•
•
•
•
•
•
MC74HC393AN
AWLYYWWG
Output Drive Capability: 10 LSTTL Loads
Outputs Directly Interface to CMOS, NMOS, and TTL
Operating Voltage Range: 2.0 to 6.0 V
Low Input Current: 1 mA
High Noise Immunity Characteristic of CMOS Devices
In Compliance with the JEDEC Standard No. 7A Requirements
Chip Complexity: 236 FETs or 59 Equivalent Gates
Pb−Free Packages are Available*
SOIC−14
D SUFFIX
CASE 751A
14
1
HC393AG
AWLYWW
1
14
14
1
TSSOP−14
DT SUFFIX
CASE 948G
1
HC
393A
ALYWG
G
14
14
1
SOEIAJ−14
F SUFFIX
CASE 965
74HC393A
ALYWG
1
A
= Assembly Location
L, WL
= Wafer Lot
Y, YY
= Year
W, WW = Work Week
G
= Pb−Free Package
G
= Pb−Free Package
(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
May, 2005 − Rev. 3
1
Publication Order Number:
MC74HC393A/D
