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MAX144BEUA  MAX144BCUA  MAX144BMJA  MAX144AEPA  MAX144BCPA  MAX145  MAX1438  MAX144BC/D  MAX144AMJA  MAX144BEPA  
SN74HC161PWRE4 4-BIT SYNCHRONOUS BINARY COUNTERS
Prototype PCB
Part No.:   SN74HC161PWRE4
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Description:   4-BIT SYNCHRONOUS BINARY COUNTERS
File Size :   639 K    
Page : 24 Pages
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Maker   TI [ TEXAS INSTRUMENTS ]http://www.ti.com
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  SN74HC161PWRE4 Datasheet PDF page 2 SN74HC161PWRE4 Datasheet PDF page 3 SN74HC161PWRE4 Datasheet PDF page 4 SN74HC161PWRE4 Datasheet PDF page 5 SN74HC161PWRE4 Datasheet PDF page 6 SN74HC161PWRE4 Datasheet PDF page 7 SN74HC161PWRE4 Datasheet PDF page 8 SN74HC161PWRE4 Datasheet PDF page 9  
100%
SN54HC161, SN74HC161
4 BIT SYNCHRONOUS BINARY COUNTERS
SCLS297D − JANUARY 1996 − REVISED SEPTEMBER 2003
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
Typical t
pd
= 14 ns
±4-mA
Output Drive at 5 V
SN54HC161 . . . J OR W PACKAGE
SN74HC161 . . . D, N, NS, OR PW PACKAGE
(TOP VIEW)
D
D
D
D
D
Low Input Current of 1
µA
Max
Internal Look-Ahead for Fast Counting
Carry Output for n-Bit Cascading
Synchronous Counting
Synchronously Programmable
SN54HC161 . . . FK PACKAGE
(TOP VIEW)
CLR
CLK
A
B
C
D
ENP
GND
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
V
CC
RCO
Q
A
Q
B
Q
C
Q
D
ENT
LOAD
A
B
NC
C
D
4
5
6
7
8
3 2 1 20 19
18
17
16
15
14
9 10 11 12 13
CLK
CLR
NC
V
CC
RCO
Q
A
Q
B
NC
Q
C
Q
D
NC − No internal connection
ORDERABLE
PART NUMBER
SN74HC161N
SN74HC161D
SN74HC161DR
SN74HC161DT
SN74HC161NSR
SN74HC161PW
SN74HC161PWR
SN74HC161PWT
SNJ54HC161J
SNJ54HC161W
SNJ54HC161FK
SNJ54HC161J
SNJ54HC161W
SNJ54HC161FK
HC161
HC161
HC161
Tube of 25
Tube of 40
Reel of 2500
Reel of 250
Reel of 2000
Tube of 90
Reel of 2000
Reel of 250
Tube of 25
Tube of 150
Tube of 55
description/ordering information
These synchronous, presettable counters feature an internal carry look-ahead for application in high-speed
counting designs. The ’HC161 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 so instructed
by the count-enable (ENP, ENT) inputs and internal gating. This mode of operation eliminates the output
counting spikes that are 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.
ORDERING INFORMATION
TA
PDIP − N
PACKAGE†
TOP-SIDE
MARKING
SN74HC161N
SOIC − D
−40°C to 85°C
SOP − NS
TSSOP − PW
CDIP − J
−55 C 125°C
−55°C to 125 C
CFP − W
LCCC − FK
† 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.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
ENP
GND
NC
LOAD
ENT
On products compliant to MIL PRF 38535, all parameters are tested
unless otherwise noted. On all other products, production
processing does not necessarily include testing of all parameters.
Copyright
2003, Texas Instruments Incorporated
1
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