ꢀꢁꢂ ꢃ ꢄꢅ ꢆ ꢇꢆ ꢈ ꢀꢁꢉ ꢃꢄ ꢅꢆ ꢇꢆ
ꢊꢋꢌ ꢍ ꢃ ꢎꢏꢐ ꢑ ꢏꢐ ꢁꢌꢒꢓ ꢅ ꢔꢋ ꢁ ꢑꢕ ꢒꢀ
SCLS143D − DECEMBER 1982 − REVISED JULY 2003
SN54HC393 . . . J OR W PACKAGE
SN74HC393 . . . D, DB, N, NS, OR PW PACKAGE
(TOP VIEW)
D
D
D
D
D
D
D
Wide Operating Voltage Range of 2 V to 6 V
Outputs Can Drive Up To 10 LSTTL Loads
Low Power Consumption, 80-µA Max I
CC
1CLK
1CLR
V
CC
13 2CLK
1
2
3
4
5
6
7
14
Typical t = 13 ns
pd
4-mA Output Drive at 5 V
12
11
10
9
1Q
1Q
2CLR
A
B
C
D
Low Input Current of 1 µA Max
Dual 4-Bit Binary Counters With Individual
Clocks
2Q
2Q
2Q
2Q
A
B
C
D
1Q
1Q
8
D
Direct Clear for Each 4-Bit Counter
GND
D
Can Significantly Improve System
Densities by Reducing Counter Package
Count by 50 Percent
SN54HC393 . . . FK PACKAGE
(TOP VIEW)
description/ordering information
The ’HC393 devices contain eight flip-flops and
additional gating to implement two individual 4-bit
counters in a single package. These devices
comprise two independent 4-bit binary counters,
each having a clear (CLR) and a clock (CLK)
input. N-bit binary counters can be implemented
with each package, providing the capability of
divide by 256. The ’HC393 devices have parallel
outputs from each counter stage so that any
submultiple of the input count frequency is
available for system timing signals.
3
2
1
20 19
18
2CLR
NC
1Q
4
5
6
7
8
A
NC
17
16
15
14
2Q
A
NC
1Q
B
NC
2Q
B
1Q
C
9 10 11 12 13
NC − No internal connection
ORDERING INFORMATION
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
†
PACKAGE
T
A
PDIP − N
SOIC − D
Tube of 25
Tube of 50
Reel of 2500
Reel of 250
Reel of 2000
Reel of 2000
Tube of 90
Reel of 2000
Reel of 250
Tube of 25
Tube of 150
Tube of 55
SN74HC393N
SN74HC393N
SN74HC393D
SN74HC393DR
SN74HC393DT
SN74HC393NSR
SN74HC393DBR
SN74HC393PW
SN74HC393PWR
SN74HC393PWT
SNJ54HC393J
HC393
SOP − NS
HC393
HC393
−40°C to 85°C
SSOP − DB
TSSOP − PW
HC393
CDIP − J
CFP − W
LCCC − FK
SNJ54HC393J
SNJ54HC393W
SNJ54HC393FK
SNJ54HC393W
SNJ54HC393FK
−55°C to 125°C
†
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are
available at www.ti.com/sc/package.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
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Copyright 2003, Texas Instruments Incorporated
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