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ꢃ ꢋꢌꢍ ꢎ ꢀꢏ ꢁꢅꢄꢐꢑ ꢁꢑ ꢒꢀ ꢌꢍ ꢁꢓꢐꢏ ꢅꢑ ꢒ ꢁꢎ ꢔꢐ ꢀ
SCLS298D − JANUARY 1996 − REVISED − OCTOBER 2003
SN54HC163 . . . J OR W PACKAGE
SN74HC163 . . . D, DB, N, NS, OR PW PACKAGE
(TOP VIEW)
D
D
D
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
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
CLR
CLK
A
V
CC
RCO
Typical t = 14 ns
pd
4-mA Output Drive at 5 V
Q
Q
Q
Q
A
B
C
D
Low Input Current of 1 µA Max
Internal Look-Ahead for Fast Counting
Carry Output for n-Bit Cascading
Synchronous Counting
B
C
D
ENP
GND
ENT
LOAD
Synchronously Programmable
SN54HC163 . . . FK PACKAGE
(TOP VIEW)
description/ordering information
These synchronous, presettable counters feature
an internal carry look-ahead for application in
high-speed counting designs. The ’HC163
devices are 4-bit binary counters. Synchronous
operation is provided by having all flip-flops
clocked simultaneously so that the outputs
change coincident with each other when
instructed by the count-enable (ENP, ENT) inputs
and internal gating. This mode of operation
eliminates the output counting spikes normally
associated with synchronous (ripple-clock)
counters. A buffered clock (CLK) input triggers the
four flip-flops on the rising (positive-going) edge of
the clock waveform.
3
2
1
20 19
18
A
B
Q
Q
4
5
6
7
8
A
B
17
16
15
14
NC
C
NC
Q
Q
C
D
D
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 40
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
SN74HC163N
SN74HC163N
SN74HC163D
SN74HC163DR
SN74HC163DT
SN74HC163NSR
SN74HC163DBR
SN74HC163PW
SN74HC163PWR
SN74HC163PWT
SNJ54HC163J
HC163
SOP − NS
HC163
HC163
−40°C to 85°C
SSOP − DB
TSSOP − PW
HC163
CDIP − J
CFP − W
LCCC − FK
SNJ54HC163J
SNJ54HC163W
SNJ54HC163FK
−55°C to 125°C
SNJ54HC163W
SNJ54HC163FK
†
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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