Decoders/Encoders/Multiplexers - Decoders/Demultiplexers - SN74HC138

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Datasheet

SN54HC138, SN74HC138 (Rev. E) (PDF 826 KB)
29 Aug 2003

	SN54HC138	SN74HC138
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
From	3	3
To	8	8
Rating	Military	Catalog
Technology Family	HC	HC
	Samples	Samples
	Inventory	Inventory

Other qualified versions of SN74HC138

Version	Part Number	Definition
Automotive	SN74HC138-Q1	Q100 devices qualified for high-reliability automotive applications targeting zero defects
Military	SN54HC138	QML certified for Military and Defense Applications

Customers Who Evaluated This Product Also Evaluated

CD74HC138: High Speed CMOS Logic 3-to-8 Line Decoder Demultiplexer Inverting and Non-Inverting
SN74HC04: Hex Inverters
SN74HC14: Hex Schmitt-Trigger Inverters
SN74HC74: Dual D-Type Positive-Edge-Triggered Flip-Flops With Clear and Preset

Product Information

Features

Targeted Specifically for High-Speed Memory Decoders and Data-Transmission Systems
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 = 15 ns
±4-mA Output Drive at 5 V
Low Input Current of 1 µA Max
Incorporate Three Enable Inputs to Simplify Cascading and/or Data Reception

Description

The ’HC138 devices are designed to be used in high-performance memory-decoding or data-routing applications requiring very short propagation delay times. In high-performance memory systems, these decoders can be used to minimize the effects of system decoding. When employed with high-speed memories utilizing a fast enable circuit, the delay times of these decoders and the enable time of the memory are usually less than the typical access time of the memory. This means that the effective system delay introduced by the decoders is negligible.

The conditions at the binary-select inputs at the three enable inputs select one of eight output lines. Two active-low and one active-high enable inputs reduce the need for external gates or inverters when expanding. A 24-line decoder can be implemented without external inverters, and a 32-line decoder requires only one inverter. An enable input can be used as a data input for demultiplexing applications.

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
SN74HC138D	ACTIVE	-40 to 85	0.22 \| 1ku	SOIC (D) \| 16	View	40 \| TUBE	Purchase Samples
SN74HC138DBR	ACTIVE	-40 to 85	0.24 \| 1ku	SSOP (DB) \| 16	View	2000 \| LARGE T&R	Contact TI Distributor or Sales Office
SN74HC138DBRE4	ACTIVE	-40 to 85	0.24 \| 1ku	SSOP (DB) \| 16	View	2000 \| LARGE T&R	Contact TI Distributor or Sales Office
SN74HC138DBRG4	ACTIVE	-40 to 85	0.24 \| 1ku	SSOP (DB) \| 16	View	2000 \| LARGE T&R	Contact TI Distributor or Sales Office
SN74HC138DE4	ACTIVE	-40 to 85	0.22 \| 1ku	SOIC (D) \| 16	View	40 \| TUBE	Purchase Samples
SN74HC138DG4	ACTIVE	-40 to 85	0.22 \| 1ku	SOIC (D) \| 16	View	40 \| TUBE	Purchase Samples
SN74HC138DR	ACTIVE	-40 to 85	0.20 \| 1ku	SOIC (D) \| 16	View	2500 \| LARGE T&R	Contact TI Distributor or Sales Office
SN74HC138DRE4	ACTIVE	-40 to 85	0.20 \| 1ku	SOIC (D) \| 16	View	2500 \| LARGE T&R	Contact TI Distributor or Sales Office
SN74HC138DRG4	ACTIVE	-40 to 85	0.20 \| 1ku	SOIC (D) \| 16	View	2500 \| LARGE T&R	Contact TI Distributor or Sales Office
SN74HC138DT	ACTIVE	-40 to 85	0.57 \| 1ku	SOIC (D) \| 16	View	250 \| SMALL T&R	Purchase Samples
SN74HC138DTE4	ACTIVE	-40 to 85	0.57 \| 1ku	SOIC (D) \| 16	View	250 \| SMALL T&R	Purchase Samples
SN74HC138DTG4	ACTIVE	-40 to 85	0.57 \| 1ku	SOIC (D) \| 16	View	250 \| SMALL T&R	Purchase Samples
SN74HC138N	ACTIVE	-40 to 85	0.22 \| 1ku	PDIP (N) \| 16	View	25 \| TUBE	Contact TI Distributor or Sales Office
SN74HC138N3	OBSOLETE	-40 to 85		PDIP (N) \| 16	View		Not Available
SN74HC138NE4	ACTIVE	-40 to 85	0.22 \| 1ku	PDIP (N) \| 16	View	25 \| TUBE	Contact TI Distributor or Sales Office
SN74HC138NSR	ACTIVE	-40 to 85	0.24 \| 1ku	SO (NS) \| 16	View	2000 \| LARGE T&R	Contact TI Distributor or Sales Office
SN74HC138NSRG4	ACTIVE	-40 to 85	0.24 \| 1ku	SO (NS) \| 16	View	2000 \| LARGE T&R	Contact TI Distributor or Sales Office
SN74HC138PW	ACTIVE	-40 to 85	0.20 \| 1ku	TSSOP (PW) \| 16	View	90 \| TUBE	Purchase Samples
SN74HC138PWE4	ACTIVE	-40 to 85	0.20 \| 1ku	TSSOP (PW) \| 16	View	90 \| TUBE	Purchase Samples
SN74HC138PWG4	ACTIVE	-40 to 85	0.20 \| 1ku	TSSOP (PW) \| 16	View	90 \| TUBE	Purchase Samples
SN74HC138PWLE	OBSOLETE	-40 to 85		TSSOP (PW) \| 16	View		Not Available
SN74HC138PWR	ACTIVE	-40 to 85	0.20 \| 1ku	TSSOP (PW) \| 16	View	2000 \| LARGE T&R	Contact TI Distributor or Sales Office
SN74HC138PWRE4	ACTIVE	-40 to 85	0.20 \| 1ku	TSSOP (PW) \| 16	View	2000 \| LARGE T&R	Contact TI Distributor or Sales Office
SN74HC138PWRG4	ACTIVE	-40 to 85	0.20 \| 1ku	TSSOP (PW) \| 16	View	2000 \| LARGE T&R	Contact TI Distributor or Sales Office
SN74HC138PWT	ACTIVE	-40 to 85	0.57 \| 1ku	TSSOP (PW) \| 16	View	250 \| SMALL T&R	Purchase Samples
SN74HC138PWTE4	ACTIVE	-40 to 85	0.57 \| 1ku	TSSOP (PW) \| 16	View	250 \| SMALL T&R	Purchase Samples
SN74HC138PWTG4	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 10:56 AM GMT, 08 Nov 2009
Region	Company	In Stock	Purchase
TI Lead Time*: 15 WeeksSN74HC138D
Americas	Arrow	>1k
	Avnet	>1k
	Newark	>1k
	Rochester Electronics	>1k
Asia	Farnell Asia	>1k
Europe	Abacus Polar	251
	Arrow Northern Europe	>1k
	Arrow Southern Europe	80
	Avnet-SILICA	993
	EBV Elektronik	>1k
	Farnell	>1k
	Spoerle	>1k
Worldwide	DigiKey	>1k
Worldwide	Mouser Electronics	>1k
TI Lead Time*: 11 WeeksSN74HC138DBR
Americas	Rochester Electronics	>1k
Worldwide	DigiKey	>1k
Worldwide	Mouser Electronics	>1k
TI Lead Time*: 11 WeeksSN74HC138DBRE4
Worldwide	DigiKey	Available
TI Lead Time*: 11 WeeksSN74HC138DBRG4
Worldwide	DigiKey	Available
TI Lead Time*: 15 WeeksSN74HC138DE4
Worldwide	DigiKey	Available
Worldwide	Mouser Electronics	>1k
TI Lead Time*: 15 WeeksSN74HC138DG4
Worldwide	DigiKey	Available
TI Lead Time*: 15 WeeksSN74HC138DR
Americas	Arrow	>1k
	Avnet	>1k
	Newark	>1k
	Rochester Electronics	>1k
Asia	Arrow Asia	>1k
	Farnell Asia	>1k
	WPI	50
Europe	Arrow Northern Europe	>1k
	Arrow Southern Europe	>1k
	Avnet-SILICA	100
	EBV Elektronik	>1k
	Spoerle	>1k
Worldwide	DigiKey	>1k
Worldwide	Mouser Electronics	458
TI Lead Time*: 15 WeeksSN74HC138DRE4
Worldwide	DigiKey	Available
TI Lead Time*: 15 WeeksSN74HC138DRG4
Worldwide	DigiKey	Available
TI Lead Time*: 15 WeeksSN74HC138DT
Worldwide	DigiKey	Available
TI Lead Time*: 15 WeeksSN74HC138DTE4
Worldwide	DigiKey	Available
TI Lead Time*: 15 WeeksSN74HC138DTG4
Worldwide	DigiKey	Available
TI Lead Time*: 18 WeeksSN74HC138N
Americas	Arrow	>1k
Americas	Rochester Electronics	>1k
Asia	Farnell Asia	>1k
Asia	Wintech	>1k
Europe	Abacus Polar	91
	Arrow Northern Europe	508
	Avnet-SILICA	25
	EBV Elektronik	>1k
	Farnell	963
Call**SN74HC138N3
Americas	Rochester Electronics	548
TI Lead Time*: 18 WeeksSN74HC138NE4
Americas	Arrow	>1k
TI Lead Time*: 15 WeeksSN74HC138NSR
Worldwide	DigiKey	20
Worldwide	Mouser Electronics	>1k
TI Lead Time*: 15 WeeksSN74HC138NSRG4
Worldwide	DigiKey	Available
TI Lead Time*: 20 WeeksSN74HC138PW
Americas	Avnet	>1k
Asia	Farnell Asia	74
Europe	Avnet-SILICA	180
Europe	Farnell	44
Worldwide	DigiKey	Available
TI Lead Time*: 20 WeeksSN74HC138PWE4
Worldwide	DigiKey	Available
TI Lead Time*: 20 WeeksSN74HC138PWG4
Worldwide	DigiKey	Available
Worldwide	Mouser Electronics	>1k
TI Lead Time*: 20 WeeksSN74HC138PWR
Americas	Arrow	>1k
	Newark	>1k
	Rochester Electronics	>1k
Asia	Farnell Asia	>1k
Europe	Arrow Northern Europe	>1k
Europe	Avnet-SILICA	25
Worldwide	DigiKey	>1k
TI Lead Time*: 20 WeeksSN74HC138PWRE4
Worldwide	DigiKey	Available
TI Lead Time*: 20 WeeksSN74HC138PWRG4
Europe	Arrow Northern Europe	>1k
Worldwide	DigiKey	Available
TI Lead Time*: 14 WeeksSN74HC138PWT
Worldwide	DigiKey	Available
TI Lead Time*: 14 WeeksSN74HC138PWTE4
Worldwide	DigiKey	Available
TI Lead Time*: 14 WeeksSN74HC138PWTG4
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
SN74HC138D	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74HC138DBR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74HC138DBRE4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74HC138DBRG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74HC138DE4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74HC138DG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74HC138DR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74HC138DRE4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74HC138DRG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74HC138DT	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74HC138DTE4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74HC138DTG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74HC138N	Pb-Free (RoHS)	CU NIPDAU	N/A for Pkg Type	View	View
SN74HC138NE4	Pb-Free (RoHS)	CU NIPDAU	N/A for Pkg Type	View	View
SN74HC138NSR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74HC138NSRG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74HC138PW	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74HC138PWE4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74HC138PWG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74HC138PWR	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74HC138PWRE4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74HC138PWRG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74HC138PWT	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74HC138PWTE4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
SN74HC138PWTG4	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 SN74HC138

Datasheet

SN54HC138, SN74HC138 (Rev. E) (PDF, 826 KB)
29 Aug 2003

Application Notes

Input and Output Characteristics of Digital Integrated Circuits (HTM, 9 KB) 9160 views
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01 Jun 1997 Read Abstract
SN54/74HCT CMOS Logic Family Applications and Restrictions (HTM, 8 KB) 3757 views
01 May 1996 Read Abstract
Using High Speed CMOS and Advanced CMOS in Systems With Multiple Vcc (HTM, 8 KB) 2053 views
01 Apr 1996 Read Abstract
Understanding and Interpreting Standard-Logic Data Sheets (Rev. B) (HTM, 8 KB) 21380 views
28 May 2003 Read Abstract
Implications of Slow or Floating CMOS Inputs (Rev. C) (HTM, 8 KB) 7013 views
01 Feb 1998 Read Abstract
CMOS Power Consumption and CPD Calculation (Rev. B) (HTM, 9 KB) 3135 views
01 Jun 1997 Read Abstract

View Application Notes for Decoders/Demultiplexers

User Guides

LOGIC Pocket Data Book (Rev. B) (PDF, 6001 KB) 46833 views
16 Jan 2007
Signal Switch Data Book (Rev. A) (PDF, 18396 KB) 9501 views
14 Nov 2003

Selection Guides

Logic Guide 2009 (Rev. Z) (PDF, 4263 KB) 88618 views
23 Jul 2009

More Literature

Logic Cross-Reference (Rev. A) (PDF, 2938 KB) 15250 views
07 Oct 2003
SN74HC4851/HC4852 Product Clip (Rev. B) (PDF, 501 KB) 2573 views
11 May 2004

Customers Who Evaluated This Product Also Evaluated...
Part #	Name	Product Family	Comments
CD74HC138	High Speed CMOS Logic 3-to-8 Line Decoder Demultiplexer Inverting and Non-Inverting	DECODERS/ENCODERS/MULTIPLEXERS-DECODERS/DEMULTIPLEXERS	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.
SN74HC74	Dual D-Type Positive-Edge-Triggered Flip-Flops With Clear and Preset	FLIP-FLOPS, LATCHES AND REGISTERS-D-TYPE FLIP-FLOPS	TI customers also evaluated this product.
SN74HC244	Octal Buffers And Line Drivers With 3-State Outputs	BUFFERS, DRIVERS AND TRANSCEIVERS-NON-INVERTING BUFFERS AND DRIVERS	TI customers also evaluated this product.
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SN74HC138 Status: ACTIVE

3-Line To 8-Line Decoders/Demultiplexers

Most Popular Links

Datasheet

Other qualified versions of SN74HC138

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

SN74HC138 Status: ACTIVE

3-Line To 8-Line Decoders/Demultiplexers

Most Popular Links

Datasheet

Other qualified versions of SN74HC138

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