Counters - Binary Counters - SN74HC161

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Datasheet

SN54HC161, SN74HC161 (Rev. D) (PDF 904 KB)
26 Sep 2003

	SN54HC161	SN74HC161
Voltage Nodes(V)	6, 5, 2	6, 5, 2
Vcc range(V)	2.0 to 6.0	2.0 to 6.0
Input Level	CMOS	CMOS
Output Level	CMOS	CMOS
Output Drive(mA)		-4/4
Output	2S	2S
Clear	Async	Async
Rating	Military	Catalog
Technology Family	HC	HC
	Samples	Samples
	Inventory	Inventory

Other qualified versions of SN74HC161

Version	Part Number	Definition
Military	SN54HC161	QML certified for Military and Defense Applications

Customers Who Evaluated This Product Also Evaluated

SN74HC393: Dual 4-Bit Binary Counters
SN74HC163: 4-Bit Synchronous Binary Counters
SN74HC04: Hex Inverters
SN74HC14: Hex Schmitt-Trigger Inverters
SN74HC138: 3-Line To 8-Line Decoders/Demultiplexers

Product Information

Features

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
Low Input Current of 1 µA Max
Internal Look-Ahead for Fast Counting
Carry Output for n-Bit Cascading
Synchronous Counting
Synchronously Programmable

Description

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.

These counters are fully programmable; that is, they can be preset to any number between 0 and 9 or 15.

View All Description in Datasheet

Pricing / Packaging / CAD Design Tools / Samples

			Price	Packaging			CAD Design Tools	Samples
Device	Status	Temp (^oC)	Price \| Quantity	Package \| Pins	Top Side Marking	Package QTY \| Package Carrier	Footprints	Samples
SN74HC161D	ACTIVE	-40 to 85	0.22 \| 1ku	SOIC (D) \| 16	View	40 \| TUBE	Purchase Samples
SN74HC161DE4	ACTIVE	-40 to 85	0.22 \| 1ku	SOIC (D) \| 16	View	40 \| TUBE	Purchase Samples
SN74HC161DG4	ACTIVE	-40 to 85	0.22 \| 1ku	SOIC (D) \| 16	View	40 \| TUBE	Purchase Samples
SN74HC161DR	ACTIVE	-40 to 85	0.20 \| 1ku	SOIC (D) \| 16	View	2500 \| LARGE T&R	Contact TI Distributor or Sales Office
SN74HC161DRE4	ACTIVE	-40 to 85	0.20 \| 1ku	SOIC (D) \| 16	View	2500 \| LARGE T&R	Contact TI Distributor or Sales Office
SN74HC161DRG4	ACTIVE	-40 to 85	0.20 \| 1ku	SOIC (D) \| 16	View	2500 \| LARGE T&R	Contact TI Distributor or Sales Office
SN74HC161DT	ACTIVE	-40 to 85	0.57 \| 1ku	SOIC (D) \| 16	View	250 \| SMALL T&R	Purchase Samples
SN74HC161DTE4	ACTIVE	-40 to 85	0.57 \| 1ku	SOIC (D) \| 16	View	250 \| SMALL T&R	Purchase Samples
SN74HC161DTG4	ACTIVE	-40 to 85	0.57 \| 1ku	SOIC (D) \| 16	View	250 \| SMALL T&R	Purchase Samples
SN74HC161N	ACTIVE	-40 to 85	0.29 \| 1ku	PDIP (N) \| 16	View	25 \| TUBE	Contact TI Distributor or Sales Office
SN74HC161N3	OBSOLETE	-40 to 85		PDIP (N) \| 16	View		Not Available
SN74HC161NE4	ACTIVE	-40 to 85	0.29 \| 1ku	PDIP (N) \| 16	View	25 \| TUBE	Contact TI Distributor or Sales Office
SN74HC161NSR	ACTIVE	-40 to 85	0.24 \| 1ku	SO (NS) \| 16	View	2000 \| LARGE T&R	Purchase Samples
SN74HC161NSRE4	ACTIVE	-40 to 85	0.24 \| 1ku	SO (NS) \| 16	View	2000 \| LARGE T&R	Purchase Samples
SN74HC161NSRG4	ACTIVE	-40 to 85	0.24 \| 1ku	SO (NS) \| 16	View	2000 \| LARGE T&R	Purchase Samples
SN74HC161PW	ACTIVE	-40 to 85	0.20 \| 1ku	TSSOP (PW) \| 16	View	90 \| TUBE	Purchase Samples
SN74HC161PWE4	ACTIVE	-40 to 85	0.20 \| 1ku	TSSOP (PW) \| 16	View	90 \| TUBE	Purchase Samples
SN74HC161PWG4	ACTIVE	-40 to 85	0.20 \| 1ku	TSSOP (PW) \| 16	View	90 \| TUBE	Purchase Samples
SN74HC161PWR	ACTIVE	-40 to 85	0.20 \| 1ku	TSSOP (PW) \| 16	View	2000 \| LARGE T&R	Purchase Samples
SN74HC161PWRE4	ACTIVE	-40 to 85	0.20 \| 1ku	TSSOP (PW) \| 16	View	2000 \| LARGE T&R	Purchase Samples
SN74HC161PWRG4	ACTIVE	-40 to 85	0.20 \| 1ku	TSSOP (PW) \| 16	View	2000 \| LARGE T&R	Purchase Samples
SN74HC161PWT	ACTIVE	-40 to 85	0.57 \| 1ku	TSSOP (PW) \| 16	View	250 \| SMALL T&R	Purchase Samples
SN74HC161PWTE4	ACTIVE	-40 to 85	0.57 \| 1ku	TSSOP (PW) \| 16	View	250 \| SMALL T&R	Purchase Samples
SN74HC161PWTG4	ACTIVE	-40 to 85	0.57 \| 1ku	TSSOP (PW) \| 16	View	250 \| SMALL T&R	Purchase Samples

* Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For higher volume price quotes,prices in local currency or delivery quotes, please contact your local Texas Instruments Sales Office or Authorized Distributor.

Inventory

Reported Distributor Inventory as of 11:04 AM GMT, 26 Nov 2009
Region	Company	In Stock	Purchase
TI Lead Time*: 20 WeeksSN74HC161D
Americas	Arrow	7
	Newark	79
	Rochester Electronics	>1k
Asia	Farnell Asia	>1k
Asia	WPI	853
Europe	EBV Elektronik	>1k
Europe	Farnell	>1k
Worldwide	DigiKey	>1k
Worldwide	Mouser Electronics	>1k
TI Lead Time*: 20 WeeksSN74HC161DE4
Americas	Rochester Electronics	892
Worldwide	DigiKey	Available
TI Lead Time*: 20 WeeksSN74HC161DG4
Worldwide	DigiKey	Available
TI Lead Time*: 20 WeeksSN74HC161DR
Americas	Rochester Electronics	>1k
Asia	WPI	>1k
Asia	Wintech	>1k
Europe	Abacus Polar	>1k
	Arrow Northern Europe	>1k
	Compel	>1k
	Spoerle	>1k
Worldwide	DigiKey	>1k
Worldwide	Mouser Electronics	>1k
TI Lead Time*: 20 WeeksSN74HC161DRE4
Worldwide	DigiKey	Available
TI Lead Time*: 20 WeeksSN74HC161DRG4
Worldwide	DigiKey	Available
TI Lead Time*: 18 WeeksSN74HC161DT
Worldwide	DigiKey	Available
TI Lead Time*: 18 WeeksSN74HC161DTE4
Worldwide	DigiKey	Available
TI Lead Time*: 18 WeeksSN74HC161DTG4
Worldwide	DigiKey	Available
TI Lead Time*: 20 WeeksSN74HC161N
Americas	Arrow	>1k
	Avnet	366
	Newark	648
	Rochester Electronics	>1k
Asia	WPI	80
Europe	Avnet-SILICA	50
	EBV Elektronik	>1k
	Spoerle	25
Worldwide	DigiKey	>1k
Worldwide	Mouser Electronics	>1k
TI Lead Time*: 20 WeeksSN74HC161NE4
Worldwide	DigiKey	Available
TI Lead Time*: 15 WeeksSN74HC161NSR
Americas	Rochester Electronics	>1k
TI Lead Time*: 15 WeeksSN74HC161NSRE4
None Reported View Distributors
TI Lead Time*: 15 WeeksSN74HC161NSRG4
None Reported View Distributors
TI Lead Time*: 20 WeeksSN74HC161PW
Worldwide	Mouser Electronics	>1k
TI Lead Time*: 20 WeeksSN74HC161PWE4
None Reported View Distributors
TI Lead Time*: 20 WeeksSN74HC161PWG4
None Reported View Distributors
TI Lead Time*: 20 WeeksSN74HC161PWR
Worldwide	Mouser Electronics	541
TI Lead Time*: 20 WeeksSN74HC161PWRE4
None Reported View Distributors
TI Lead Time*: 20 WeeksSN74HC161PWRG4
None Reported View Distributors
TI Lead Time*: 20 WeeksSN74HC161PWT
None Reported View Distributors
TI Lead Time*: 20 WeeksSN74HC161PWTE4
None Reported View Distributors
TI Lead Time*: 20 WeeksSN74HC161PWTG4
None Reported View Distributors
View all Distributors

** Lead time information is not available at this time. However, our information is updated daily so please check back with us soon. Please contact your preferred TI Authorized Distributor for additional information.

Quality & Lead (Pb)-Free Data

	Product Content				DPPM / MTBF / FIT Rate
Device	Eco Plan*	Lead / Ball Finish	MSL Rating / Peak Reflow	Details	Details
SN74HC161D	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74HC161DE4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74HC161DG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74HC161DR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74HC161DRE4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74HC161DRG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74HC161DT	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74HC161DTE4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74HC161DTG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74HC161N	Pb-Free (RoHS)	CU NIPDAU	N/A for Pkg Type	View	View
SN74HC161NE4	Pb-Free (RoHS)	CU NIPDAU	N/A for Pkg Type	View	View
SN74HC161NSR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74HC161NSRE4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74HC161NSRG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74HC161PW	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74HC161PWE4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74HC161PWG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74HC161PWR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74HC161PWRE4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74HC161PWRG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74HC161PWT	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74HC161PWTE4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74HC161PWTG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View

* The planned eco-friendly classification: Pb-Free (RoHS) or Pb-Free (RoHS Exempt) or Green (RoHS & no Sb/Br) - please click on the Product Content Details "View" link in the table above for the latest availability information and additional product content details.

If the information you are requesting is not available online at this time, contact one of our Product Information Centers regarding the availability of this information.

Technical Documents

Most useful technical documents for SN74HC161

Datasheet

SN54HC161, SN74HC161 (Rev. D) (PDF, 904 KB)
26 Sep 2003

Application Notes

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01 Jun 1997 Read Abstract
SN54/74HCT CMOS Logic Family Applications and Restrictions (HTM, 8 KB) 3831 views
01 May 1996 Read Abstract
Using High Speed CMOS and Advanced CMOS in Systems With Multiple Vcc (HTM, 8 KB) 2082 views
01 Apr 1996 Read Abstract
Understanding and Interpreting Standard-Logic Data Sheets (Rev. B) (HTM, 8 KB) 21746 views
28 May 2003 Read Abstract
Implications of Slow or Floating CMOS Inputs (Rev. C) (HTM, 8 KB) 7134 views
01 Feb 1998 Read Abstract
HCMOS Design Considerations (Rev. A) (HTM, 8 KB) 1436 views
09 Sep 2002 Read Abstract
CMOS Power Consumption and CPD Calculation (Rev. B) (HTM, 9 KB) 3175 views
01 Jun 1997 Read Abstract

View Application Notes for Binary Counters

User Guides

LOGIC Pocket Data Book (Rev. B) (PDF, 6001 KB) 47453 views
16 Jan 2007
Signal Switch Data Book (Rev. A) (PDF, 18396 KB) 9675 views
14 Nov 2003

Selection Guides

Logic Guide 2009 (Rev. Z) (PDF, 4263 KB) 90936 views
23 Jul 2009

More Literature

Logic Cross-Reference (Rev. A) (PDF, 2938 KB) 15456 views
07 Oct 2003
SN74HC4851/HC4852 Product Clip (Rev. B) (PDF, 501 KB) 2610 views
11 May 2004

Customers Who Evaluated This Product Also Evaluated...
Part #	Name	Product Family	Comments
SN74HC393	Dual 4-Bit Binary Counters	COUNTERS-BINARY COUNTERS	TI customers also evaluated this product.
SN74HC163	4-Bit Synchronous Binary Counters	COUNTERS-BINARY COUNTERS	TI customers also evaluated this product.
SN74HC04	Hex Inverters	BUFFERS, DRIVERS AND TRANSCEIVERS-INVERTING BUFFERS AND DRIVERS	TI customers also evaluated this product.
SN74HC14	Hex Schmitt-Trigger Inverters	BUFFERS, DRIVERS AND TRANSCEIVERS-INVERTING BUFFERS AND DRIVERS	TI customers also evaluated this product.
SN74HC138	3-Line To 8-Line Decoders/Demultiplexers	DECODERS/ENCODERS/MULTIPLEXERS-DECODERS/DEMULTIPLEXERS	TI customers also evaluated this product.
SN74HC00	Quad 2-Input Positive-NAND Gates	GATES-NAND GATES	TI customers also evaluated this product.

Support and Community

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SN74HC161 Status: ACTIVE

4-Bit Synchronous Binary Counters

Most Popular Links

Datasheet

Other qualified versions of SN74HC161

Customers Who Evaluated This Product Also Evaluated

Product Information

Features

Description

Pricing / Packaging / CAD Design Tools / Samples

Inventory

Quality & Lead (Pb)-Free Data

Technical Documents

Datasheet

Application Notes

User Guides

Selection Guides

More Literature

Support and Community

Customer Tags

Other Support

SN74HC161 Status: ACTIVE

4-Bit Synchronous Binary Counters

Most Popular Links

Datasheet

Other qualified versions of SN74HC161

Customers Who Evaluated This Product Also Evaluated

Product Information

Features

Description

Pricing / Packaging / CAD Design Tools / Samples

Inventory

Quality & Lead (Pb)-Free Data

Technical Documents

Datasheet

Application Notes

User Guides

Selection Guides

More Literature

Related Products

Support and Community

Customer Tags

Other Support