Flip-Flops, Latches and Registers - Other Latches - SN74LS279A

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Datasheet

Quadruple S-R Latches (PDF 35266 KB)
01 Mar 1988

	SN54LS279A	SN74LS279A
Voltage Nodes(V)	5	5
Vcc range(V)	4.5 to 5.5	4.75 to 5.25
Input Level	TTL	TTL
Output Level	TTL	TTL
Output Drive(mA)		-0.4/8
Output	2S	2S
No. of Bits	4	4
tpd max(ns)		22
Rating	Military	Catalog
Technology Family	LS	LS
	Samples	Samples
	Inventory	Inventory

Other qualified versions of SN74LS279A

Version	Part Number	Definition
Military	SN54LS279A	QML certified for Military and Defense Applications

Product Information

Features

Package Options Include Plastic "Small Outline" Packages, Ceramic Chip Carriers and Flat Packages, and Plastic and Ceramic DIPs
Dependable Texas Instruments Quality and Reliability

Description

The ’279 offers 4 basic S\-R\ flip-flop latches in one 16-pin, 300-mil package. Under conventional operation, the S\-R\ inputs are normally held high. When the S\ input is pulsed low, the Q output will be set high. When R\ is pulsed low, the Q output will be reset low. Normally, the S\-R\ inputs should not be taken low simultaneously. The Q output will be unpredictable in this condition.

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
SN74LS279AD	ACTIVE	0 to 70	0.77 \| 1ku	SOIC (D) \| 16	View	40 \| TUBE	Purchase Samples
SN74LS279ADE4	ACTIVE	0 to 70	0.77 \| 1ku	SOIC (D) \| 16	View	40 \| TUBE	Purchase Samples
SN74LS279ADG4	ACTIVE	0 to 70	0.77 \| 1ku	SOIC (D) \| 16	View	40 \| TUBE	Purchase Samples
SN74LS279ADR	ACTIVE	0 to 70	0.70 \| 1ku	SOIC (D) \| 16	View	2500 \| LARGE T&R	Purchase Samples
SN74LS279ADRE4	ACTIVE	0 to 70	0.70 \| 1ku	SOIC (D) \| 16	View	2500 \| LARGE T&R	Purchase Samples
SN74LS279ADRG4	ACTIVE	0 to 70	0.70 \| 1ku	SOIC (D) \| 16	View	2500 \| LARGE T&R	Purchase Samples
SN74LS279AN	ACTIVE	0 to 70	0.70 \| 1ku	PDIP (N) \| 16	View	25 \| TUBE	Purchase Samples
SN74LS279AN3	OBSOLETE	0 to 70		PDIP (N) \| 16	View		Not Available
SN74LS279ANE4	ACTIVE	0 to 70	0.70 \| 1ku	PDIP (N) \| 16	View	25 \| TUBE	Purchase Samples
SN74LS279ANSR	ACTIVE	0 to 70	0.70 \| 1ku	SO (NS) \| 16	View	2000 \| LARGE T&R	Purchase Samples
SN74LS279ANSRE4	ACTIVE	0 to 70	0.70 \| 1ku	SO (NS) \| 16	View	2000 \| LARGE T&R	Purchase Samples
SN74LS279ANSRG4	ACTIVE	0 to 70	0.70 \| 1ku	SO (NS) \| 16	View	2000 \| LARGE 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 10:58 AM GMT, 22 Nov 2009
Region	Company	In Stock	Purchase
TI Lead Time*: 15 WeeksSN74LS279AD
Americas	Arrow	>1k
	Avnet	630
	Rochester Electronics	>1k
Asia	Farnell Asia	206
Europe	Farnell	189
Worldwide	Mouser Electronics	181
TI Lead Time*: 15 WeeksSN74LS279ADE4
Worldwide	Mouser Electronics	540
TI Lead Time*: 15 WeeksSN74LS279ADG4
None Reported View Distributors
TI Lead Time*: 15 WeeksSN74LS279ADR
Americas	Rochester Electronics	>1k
TI Lead Time*: 15 WeeksSN74LS279ADRE4
None Reported View Distributors
TI Lead Time*: 15 WeeksSN74LS279ADRG4
None Reported View Distributors
TI Lead Time*: 18 WeeksSN74LS279AN
Americas	Arrow	700
	Avnet	>1k
	Newark	550
	Rochester Electronics	600
Asia	Farnell Asia	256
Europe	Avnet-SILICA	250
	EBV Elektronik	850
	Farnell	201
	Spoerle	175
Worldwide	DigiKey	152
Worldwide	Mouser Electronics	15
TI Lead Time*: 18 WeeksSN74LS279ANE4
Worldwide	DigiKey	Available
Worldwide	Mouser Electronics	621
TI Lead Time*: 15 WeeksSN74LS279ANSR
Americas	Rochester Electronics	>1k
Worldwide	DigiKey	>1k
TI Lead Time*: 15 WeeksSN74LS279ANSRE4
Worldwide	DigiKey	Available
TI Lead Time*: 15 WeeksSN74LS279ANSRG4
Worldwide	DigiKey	Available
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
SN74LS279AD	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74LS279ADE4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74LS279ADG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74LS279ADR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74LS279ADRE4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74LS279ADRG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74LS279AN	Pb-Free (RoHS)	CU NIPDAU	N/A for Pkg Type	View	View
SN74LS279ANE4	Pb-Free (RoHS)	CU NIPDAU	N/A for Pkg Type	View	View
SN74LS279ANSR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74LS279ANSRE4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74LS279ANSRG4	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 SN74LS279A

Datasheet

Quadruple S-R Latches (PDF, 35266 KB)
01 Mar 1988

Application Notes

Input and Output Characteristics of Digital Integrated Circuits (HTM, 9 KB) 9367 views
01 Oct 1996 Read Abstract
Live Insertion (HTM, 8 KB) 2440 views
01 Oct 1996 Read Abstract
TI IBIS File Creation, Validation, and Distribution Processes (HTM, 9 KB) 3902 views
29 Aug 2002 Read Abstract
Shelf-Life Evaluation of Lead-Free Component Finishes (HTM, 8 KB) 27231 views
24 May 2004 Read Abstract
Designing with the SN54/74LS123 (Rev. A) (HTM, 9 KB) 3058 views
01 Mar 1997 Read Abstract
Designing With Logic (Rev. C) (HTM, 8 KB) 9152 views
01 Jun 1997 Read Abstract
Understanding and Interpreting Standard-Logic Data Sheets (Rev. B) (HTM, 8 KB) 21673 views
28 May 2003 Read Abstract

View Application Notes for Other Latches

User Guides

LOGIC Pocket Data Book (Rev. B) (PDF, 6001 KB) 47290 views
16 Jan 2007

Selection Guides

Logic Guide 2009 (Rev. Z) (PDF, 4263 KB) 90505 views
23 Jul 2009

More Literature

Logic Cross-Reference (Rev. A) (PDF, 2938 KB) 15408 views
07 Oct 2003

Support and Community

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SN74LS279A Status: ACTIVE

Quad /S-/R latches

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Datasheet

Other qualified versions of SN74LS279A

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

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