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MC74HC393A Datasheet PDF : 8 Pages
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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.
• Output Drive Capability: 10 LSTTL Loads
• Outputs Directly Interface to CMOS, NMOS, and TTL
• Operating Voltage Range: 2 to 6 V
• Low Input Current: 1 µA
• High Noise Immunity Characteristic of CMOS Devices
• In Compliance with the Requirements Defined by JEDEC Standard
No. 7A
• Chip Complexity: 236 FETs or 59 Equivalent Gates
LOGIC DIAGRAM
CLOCK 1, 13
BINARY
COUNTER
3, 11 Q1
4, 10 Q2
5, 9 Q3
6, 8 Q4
RESET 2, 12
PIN 14 = VCC
PIN 7 = GND
FUNCTION TABLE
Inputs
Clock Reset
Outputs
X
H
L
H
L
No Change
L
L
No Change
L
No Change
L
Advance to
Next State
http://onsemi.com
PDIP–14
N SUFFIX
CASE 646
SOIC–14
D SUFFIX
CASE 751A
MARKING
DIAGRAMS
14
MC74HC393AN
AWLYYWW
1
14
HC393A
AWLYWW
1
14
TSSOP–14
DT SUFFIX
CASE 948G
HC
393A
ALYW
1
A
= Assembly Location
WL or L = Wafer Lot
YY or Y = Year
WW or W = Work Week
PIN ASSIGNMENT
CLOCK a 1
RESET a 2
Q1a 3
Q2a 4
Q3a 5
Q4a 6
GND 7
14 VCC
13 CLOCK b
12 RESET b
11 Q1b
10 Q2b
9 Q3b
8 Q4b
ORDERING INFORMATION
Device
Package Shipping
MC74HC393AN
PDIP–14 2000 / Box
MC74HC393AD
SOIC–14
55 / Rail
MC74HC393ADR2
SOIC–14 2500 / Reel
MC74HC393ADT
TSSOP–14 96 / Rail
MC74HC393ADTR2 TSSOP–14 2500 / Reel
© Semiconductor Components Industries, LLC, 2000
1
March, 2000 – Rev. 2
Publication Order Number:
MC74HC393A/D
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