CD74HC138 Status: ACTIVE

High Speed CMOS Logic 3-to-8 Line Decoder Demultiplexer Inverting and Non-Inverting

Harris

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Datasheet

CD54/74HC138, CD54/74HCT138, CD54/74HC238, CD54/74HCT238 (Rev. I) (PDF 641 KB)
24 Aug 2004

	CD54HC138	CD74HC138
Voltage Nodes(V)	6, 5, 2
Rating	Military	Catalog
Technology Family	HC	HC
	Samples	Samples
	Inventory	Inventory

Other qualified versions of CD74HC138

Version	Part Number	Definition
Automotive	CD74HC138-Q1	Q100 devices qualified for high-reliability automotive applications targeting zero defects
Military	CD54HC138	QML certified for Military and Defense Applications

Customers Who Evaluated This Product Also Evaluated

SN74HC138: 3-Line To 8-Line Decoders/Demultiplexers
CD74HC154: High Speed CMOS Logic 4-to-16 Line Decoder/Demultiplexer
TMS320F28335: Delfino Microcontroller
NE5534A: Low-Noise Operational Amplifier
TL084A: JFET-Input Operational Amplifier

Product Information

Features

Select One Of Eight Data Outputs Active Low for 138, Active High for 238
I/O Port or Memory Selector
Three Enable Inputs to Simplify Cascading
Typical Propagation Delay of 13ns at V_CC = 5V, C_L = 15pF, T_A = 25°C
Fanout (Over Temperature Range)
- Standard Outputs . . . . 10 LSTTL Loads
- Bus Driver Outputs . . . . 15 LSTTL Loads
Wide Operating Temperature Range . . . –55°C to 125°C
Balanced Propagation Delay and Transition Times
Significant Power Reduction Compared to LSTTL Logic ICs
HC Types
- 2V to 6V Operation
- High Noise Immunity: N_IL = 30%, N_IH = 30% of V_CC at V_CC = 5V
HCT Types
- 4.5V to 5.5V Operation
- Direct LSTTL Input Logic Compatibility, V_IL = 0.8V (Max), V_IH = 2V (Min)
- CMOS Input Compatibility, I_l 1µA at V_OL, V_OH

Data sheet acquired from Harris Semiconductor

Description

The ’HC138, ’HC238, ’HCT138, and ’HCT238 are high speed silicon gate CMOS decoders well suited to memory address decoding or data routing applications. Both circuits feature low power consumption usually associated with CMOS circuitry, yet have speeds comparable to low power Schottky TTL logic. Both circuits have three binary select inputs (A0, A1 and A2). If the device is enabled, these inputs determine which one of the eight normally high outputs of the HC/HCT138 series will go low or which of the normally low outputs of the HC/HCT238 series will go high.

Two active low and one active high enables (E1\, E2\, and E3) are provided to ease the cascading of decoders. The decoder’s 8 outputs can drive 10 low power Schottky TTL equivalent loads.

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
CD74HC138E	ACTIVE	-55 to 125	0.40 \| 1ku	PDIP (N) \| 16	View	25 \| TUBE	Contact TI Distributor or Sales Office
CD74HC138EE4	ACTIVE	-55 to 125	0.40 \| 1ku	PDIP (N) \| 16	View	25 \| TUBE	Contact TI Distributor or Sales Office
CD74HC138M	ACTIVE	-55 to 125	0.35 \| 1ku	SOIC (D) \| 16	View	40 \| TUBE	Purchase Samples
CD74HC138M96	ACTIVE	-55 to 125	0.35 \| 1ku	SOIC (D) \| 16	View	2500 \| LARGE T&R	Contact TI Distributor or Sales Office
CD74HC138M96E4	ACTIVE	-55 to 125	0.35 \| 1ku	SOIC (D) \| 16	View	2500 \| LARGE T&R	Contact TI Distributor or Sales Office
CD74HC138M96G4	ACTIVE	-55 to 125	0.35 \| 1ku	SOIC (D) \| 16	View	2500 \| LARGE T&R	Contact TI Distributor or Sales Office
CD74HC138ME4	ACTIVE	-55 to 125	0.35 \| 1ku	SOIC (D) \| 16	View	40 \| TUBE	Purchase Samples
CD74HC138MG4	ACTIVE	-55 to 125	0.35 \| 1ku	SOIC (D) \| 16	View	40 \| TUBE	Purchase Samples
CD74HC138MT	ACTIVE	-55 to 125	0.68 \| 1ku	SOIC (D) \| 16	View	250 \| SMALL T&R	Purchase Samples
CD74HC138MTE4	ACTIVE	-55 to 125	0.68 \| 1ku	SOIC (D) \| 16	View	250 \| SMALL T&R	Purchase Samples
CD74HC138MTG4	ACTIVE	-55 to 125	0.68 \| 1ku	SOIC (D) \| 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 12:07 PM GMT, 24 Nov 2009
Region	Company	In Stock	Purchase
TI Lead Time*: 20 WeeksCD74HC138E
Americas	Arrow	>1k
	Avnet	>1k
	Newark	>1k
	Rochester Electronics	>1k
Asia	Farnell Asia	33
Europe	Arrow Northern Europe	175
	Avnet-SILICA	>1k
	EBV Elektronik	125
	Farnell	33
	Spoerle	650
Worldwide	Mouser Electronics	713
TI Lead Time*: 20 WeeksCD74HC138EE4
Worldwide	Mouser Electronics	>1k
TI Lead Time*: 20 WeeksCD74HC138M
Americas	Arrow	>1k
	Avnet	>1k
	Newark	>1k
	Rochester Electronics	>1k
Asia	Farnell Asia	269
Europe	Arrow Northern Europe	>1k
	Arrow Southern Europe	60
	Avnet-SILICA	>1k
	EBV Elektronik	>1k
	Farnell	251
	Spoerle	>1k
Worldwide	DigiKey	9
Worldwide	Mouser Electronics	698
TI Lead Time*: 20 WeeksCD74HC138M96
Americas	Arrow	>1k
Americas	Rochester Electronics	>1k
Europe	Abacus Polar	>1k
Worldwide	DigiKey	>1k
Worldwide	Mouser Electronics	>1k
TI Lead Time*: 20 WeeksCD74HC138M96E4
Worldwide	DigiKey	Available
TI Lead Time*: 20 WeeksCD74HC138M96G4
Worldwide	DigiKey	Available
TI Lead Time*: 20 WeeksCD74HC138ME4
Americas	Avnet	>1k
Worldwide	DigiKey	Available
TI Lead Time*: 20 WeeksCD74HC138MG4
Worldwide	DigiKey	Available
TI Lead Time*: 18 WeeksCD74HC138MT
Americas	Rochester Electronics	250
Worldwide	DigiKey	Available
TI Lead Time*: 18 WeeksCD74HC138MTE4
Worldwide	DigiKey	Available
TI Lead Time*: 18 WeeksCD74HC138MTG4
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
CD74HC138E	Pb-Free (RoHS)	CU NIPDAU	N/A for Pkg Type	View	View
CD74HC138EE4	Pb-Free (RoHS)	CU NIPDAU	N/A for Pkg Type	View	View
CD74HC138M	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
CD74HC138M96	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
CD74HC138M96E4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
CD74HC138M96G4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
CD74HC138ME4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
CD74HC138MG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
CD74HC138MT	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
CD74HC138MTE4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-1-260C-UNLIM	View	View
CD74HC138MTG4	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 CD74HC138

Datasheet

CD54/74HC138, CD54/74HCT138, CD54/74HC238, CD54/74HCT238 (Rev. I) (PDF, 641 KB)
24 Aug 2004

Application Notes

Input and Output Characteristics of Digital Integrated Circuits (HTM, 9 KB) 9385 views
01 Oct 1996 Read Abstract
Live Insertion (HTM, 8 KB) 2441 views
01 Oct 1996 Read Abstract
Selecting the Right Texas Instruments Signal Switch (HTM, 8 KB) 6071 views
07 Sep 2001 Read Abstract
TI IBIS File Creation, Validation, and Distribution Processes (HTM, 9 KB) 3904 views
29 Aug 2002 Read Abstract
Shelf-Life Evaluation of Lead-Free Component Finishes (HTM, 8 KB) 27253 views
24 May 2004 Read Abstract
Designing With Logic (Rev. C) (HTM, 8 KB) 9159 views
01 Jun 1997 Read Abstract
SN54/74HCT CMOS Logic Family Applications and Restrictions (HTM, 8 KB) 3812 views
01 May 1996 Read Abstract
Using High Speed CMOS and Advanced CMOS in Systems With Multiple Vcc (HTM, 8 KB) 2079 views
01 Apr 1996 Read Abstract
Understanding and Interpreting Standard-Logic Data Sheets (Rev. B) (HTM, 8 KB) 21693 views
28 May 2003 Read Abstract
Implications of Slow or Floating CMOS Inputs (Rev. C) (HTM, 8 KB) 7105 views
01 Feb 1998 Read Abstract
CMOS Power Consumption and CPD Calculation (Rev. B) (HTM, 9 KB) 3172 views
01 Jun 1997 Read Abstract

View Application Notes for Decoders/Demultiplexers

User Guides

LOGIC Pocket Data Book (Rev. B) (PDF, 6001 KB) 47354 views
16 Jan 2007
Signal Switch Data Book (Rev. A) (PDF, 18396 KB) 9650 views
14 Nov 2003

Selection Guides

Logic Guide 2009 (Rev. Z) (PDF, 4263 KB) 90646 views
23 Jul 2009

More Literature

Logic Cross-Reference (Rev. A) (PDF, 2938 KB) 15425 views
07 Oct 2003
SN74HC4851/HC4852 Product Clip (Rev. B) (PDF, 501 KB) 2604 views
11 May 2004

Customers Who Evaluated This Product Also Evaluated...
Part #	Name	Product Family	Comments
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CD74HC138 Status: ACTIVE

High Speed CMOS Logic 3-to-8 Line Decoder Demultiplexer Inverting and Non-Inverting

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