CD54HCT138 Status: ACTIVE

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

Harris

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Datasheet

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

	CD54HCT138	CD74HCT138
Voltage Nodes(V)	5
Rating	Military	Catalog
Technology Family	HCT	HCT
	Samples	Samples
	Inventory	Inventory

Other qualified versions of CD54HCT138

Version	Part Number	Definition
Catalog	CD74HCT138	TI's standard catalog product

Customers Who Evaluated This Product Also Evaluated

SN54LS139A: Dual 2-Line To 4-Line Decoders/Demultiplexers
CD54HCT08: High Speed CMOS Logic Quad 2-Input AND Gates
CD54HCT574: High Speed CMOS Logic Octal Positive-Edge Triggered D-Type Flip-Flops with 3-State Outputs
CD54HCT244: High Speed CMOS Logic Non-Inverting Octal Buffer/Line Drivers with 3-State Outputs

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	Package QTY \| Package Carrier	Footprints	Samples
CD54HCT138F	ACTIVE	-55 to 125	2.05 \| 1ku	CDIP (J) \| 16	1 \| TUBE	Contact TI Distributor or Sales Office
CD54HCT138F3A	ACTIVE	-55 to 125	3.36 \| 1ku	CDIP (J) \| 16	1 \| TUBE	Contact TI Distributor or Sales Office

* 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 12:10 PM GMT, 25 Nov 2009
Region	Company	In Stock	Purchase
TI Lead Time*: 8 WeeksCD54HCT138F
Americas	Rochester Electronics	>1k
TI Lead Time*: 8 WeeksCD54HCT138F3A
Americas	Arrow	55
Americas	Avnet	38
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
CD54HCT138F	TBD	A42	N/A for Pkg Type	View	View
CD54HCT138F3A	TBD	A42	N/A for Pkg Type	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 CD54HCT138

Datasheet

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

Application Notes

TI IBIS File Creation, Validation, and Distribution Processes (HTM, 9 KB) 3906 views
29 Aug 2002 Read Abstract
Shelf-Life Evaluation of Lead-Free Component Finishes (HTM, 8 KB) 27271 views
24 May 2004 Read Abstract
Designing With Logic (Rev. C) (HTM, 8 KB) 9164 views
01 Jun 1997 Read Abstract
SN54/74HCT CMOS Logic Family Applications and Restrictions (HTM, 8 KB) 3825 views
01 May 1996 Read Abstract
Using High Speed CMOS and Advanced CMOS in Systems With Multiple Vcc (HTM, 8 KB) 2081 views
01 Apr 1996 Read Abstract
Understanding and Interpreting Standard-Logic Data Sheets (Rev. B) (HTM, 8 KB) 21719 views
28 May 2003 Read Abstract
Implications of Slow or Floating CMOS Inputs (Rev. C) (HTM, 8 KB) 7120 views
01 Feb 1998 Read Abstract
CMOS Power Consumption and CPD Calculation (Rev. B) (HTM, 9 KB) 3173 views
01 Jun 1997 Read Abstract

View Application Notes for Decoders/Demultiplexers

User Guides

LOGIC Pocket Data Book (Rev. B) (PDF, 6001 KB) 47392 views
16 Jan 2007
Signal Switch Data Book (Rev. A) (PDF, 18396 KB) 9661 views
14 Nov 2003

Selection Guides

Logic Guide 2009 (Rev. Z) (PDF, 4263 KB) 90790 views
23 Jul 2009

More Literature

Logic Cross-Reference (Rev. A) (PDF, 2938 KB) 15434 views
07 Oct 2003

Customers Who Evaluated This Product Also Evaluated...
Part #	Name	Product Family	Comments
SN54LS139A	Dual 2-Line To 4-Line Decoders/Demultiplexers	DECODERS/ENCODERS/MULTIPLEXERS-DECODERS/DEMULTIPLEXERS	TI customers also evaluated this product.
CD54HCT08	High Speed CMOS Logic Quad 2-Input AND Gates	GATES-AND GATES	TI customers also evaluated this product.
CD54HCT574	High Speed CMOS Logic Octal Positive-Edge Triggered D-Type Flip-Flops with 3-State Outputs	FLIP-FLOPS, LATCHES AND REGISTERS-D-TYPE (3-STATE) FLIP-FLOPS	TI customers also evaluated this product.
CD54HCT244	High Speed CMOS Logic Non-Inverting Octal Buffer/Line Drivers with 3-State Outputs	BUFFERS, DRIVERS AND TRANSCEIVERS-NON-INVERTING BUFFERS AND DRIVERS	TI customers also evaluated this product.
SN54LS14	Hex Schmitt-trigger Inverters	BUFFERS, DRIVERS AND TRANSCEIVERS-INVERTING BUFFERS AND DRIVERS	TI customers also evaluated this product.
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SN54LS165A	Parallel-Load 8-Bit Shift Registers	FLIP-FLOPS, LATCHES AND REGISTERS-SHIFT REGISTERS	TI customers also evaluated this product.
CD54HCT245	High Speed CMOS Logic Non-Inverting Octal-Bus Transceiver with 3-State Outputs	BUFFERS, DRIVERS AND TRANSCEIVERS-STANDARD TRANSCEIVERS	TI customers also evaluated this product.
SN54LS373	Octal D-Type Transparent Latches with 3-state Outputs	FLIP-FLOPS, LATCHES AND REGISTERS-D-TYPE LATCHES	TI customers also evaluated this product.
SN54F04	Hex Inverters	BUFFERS, DRIVERS AND TRANSCEIVERS-INVERTING BUFFERS AND DRIVERS	TI customers also evaluated this product.
SN54LS240	Octal Buffers And Line Drivers With 3-State Outputs	BUFFERS, DRIVERS AND TRANSCEIVERS-INVERTING BUFFERS AND DRIVERS	TI customers also evaluated this product.

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CD54HCT138 Status: ACTIVE

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

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