74LVC138APW,112 Equivalent & Substitute Parts

Part Overview

The 74LVC138APW,112 is a decoder/demultiplexer logic IC manufactured by Nexperia USA Inc., featuring a 1 x 3:8 circuit configuration in a 16-TSSOP surface mount package. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The device operates across a single supply voltage range of 1.2V to 3.6V with output currents of 24mA for both high and low states, suitable for general-purpose logic applications requiring address decoding or signal demultiplexing functions.

Key Parameters

Parameter	Value
Part Number	74LVC138APW,112
Manufacturer	Nexperia USA Inc.
Type	Decoder/Demultiplexer
Circuit Configuration	1 x 3:8
Package Type	16-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
Voltage Supply Range	1.2V ~ 3.6V
Output Current (High/Low)	24mA / 24mA
Operating Temperature	-40°C ~ 125°C
Product Status	Obsolete
RoHS Compliance	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the 74LVC138APW,112 is determined by the following critical parameters:

Circuit Configuration: 1 x 3:8 decoder/demultiplexer function
Package Type: 16-TSSOP surface mount package with 0.173" width (4.40mm)
Output Current Capability: 24mA high and low output drive
Voltage Supply Range: Minimum 1.2V to 3.6V operation
Operating Temperature Range: -40°C to 125°C minimum
RoHS Compliance: ROHS3 Compliant status

Substitute parts are grouped into two categories based on voltage supply compatibility:

Category A - Extended Voltage Range (1.65V ~ 3.6V or 2V ~ 3.6V): Parts from Texas Instruments (SN74LVC series) and onsemi (74LCX series) that maintain the same decoder/demultiplexer function and package configuration. These parts operate within the supply voltage envelope of the original part.

Category B - Automotive Grade (2V ~ 3.6V with AEC-Q100): The CLVC138AQPWRG4Q1 from Texas Instruments, which adds automotive qualification while maintaining functional and electrical compatibility.

Parameter Comparison

Parameter	74LVC138APW,112	MC74LCX138DTR2G	74LCX138MTCX	CLVC138AQPWRG4Q1	MC74LCX138DTG	SN74LVC138AMPWTEP	SN74LVC138APW	SN74LVC138APWR	SN74LVC138APWT	SN74LVC138AQPWREP
Manufacturer	Nexperia USA Inc.	onsemi	onsemi	Texas Instruments	onsemi	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments
Series	74LVC	74LCX	74LCX	74LVC	74LCX	74LVC	74LVC	74LVC	74LVC	74LVC
Circuit Configuration	1 x 3:8	1 x 3:8	1 x 3:8	1 x 3:8	1 x 3:8	1 x 3:8	1 x 3:8	1 x 3:8	1 x 3:8	1 x 3:8
Package Type	16-TSSOP	16-TSSOP	16-TSSOP	16-TSSOP	16-TSSOP	16-TSSOP	16-TSSOP	16-TSSOP	16-TSSOP	16-TSSOP
Output Current (High/Low)	24mA / 24mA	24mA / 24mA	24mA / 24mA	24mA / 24mA	24mA / 24mA	24mA / 24mA	24mA / 24mA	24mA / 24mA	24mA / 24mA	24mA / 24mA
Voltage Supply Range	1.2V ~ 3.6V	2V ~ 3.6V	2V ~ 3.6V	2V ~ 3.6V	2V ~ 3.6V	2V ~ 3.6V	1.65V ~ 3.6V	1.65V ~ 3.6V	1.65V ~ 3.6V	2V ~ 3.6V
Operating Temperature	-40°C ~ 125°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 125°C	-40°C ~ 85°C	-55°C ~ 125°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 125°C
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active	Active
Automotive Grade	No	No	No	Yes (AEC-Q100)	No	No	No	No	No	No
RoHS Compliance	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

For Standard Industrial Applications: SN74LVC138APW, SN74LVC138APWR, and SN74LVC138APWT from Texas Instruments are direct functional equivalents with active product status. These parts maintain the 74LVC series designation and support the extended voltage range down to 1.65V, providing compatibility with the original part's lower voltage specification.

For Extended Temperature Range Requirements: SN74LVC138AMPWTEP extends the operating temperature range to -55°C to 125°C, suitable for applications requiring enhanced low-temperature performance while maintaining the same decoder/demultiplexer functionality.

For Automotive Applications: CLVC138AQPWRG4Q1 from Texas Instruments provides AEC-Q100 automotive qualification with the same 1 x 3:8 decoder configuration and 16-TSSOP package. This part is suitable for automotive-grade designs requiring certified component traceability.

For onsemi-Based Designs: MC74LCX138DTR2G and 74LCX138MTCX provide functional equivalence through the 74LCX series, with the trade-off of reduced operating temperature range (-40°C to 85°C) compared to the original part's -40°C to 125°C specification.

All substitute parts maintain ROHS3 compliance, MSL Level 1 rating, and identical output current specifications (24mA high/low), ensuring direct functional replacement within the specified electrical and thermal operating envelopes.

Frequently Asked Questions (FAQ)

Q: Can the 74LCX138MTCX replace the 74LVC138APW,112 in all applications?

A: The 74LCX138MTCX provides functional equivalence in the decoder/demultiplexer circuit configuration and 16-TSSOP package. However, it operates only to 85°C maximum, compared to the original part's 125°C specification. Applications requiring operation above 85°C require selection of parts with extended temperature ratings such as SN74LVC138AMPWTEP or CLVC138AQPWRG4Q1.

Q: What is the voltage supply compatibility difference between substitute parts?

A: The original 74LVC138APW,112 operates from 1.2V to 3.6V. Most active substitutes operate from 2V to 3.6V or 1.65V to 3.6V. For applications requiring operation below 1.65V, SN74LVC138APW and SN74LVC138APWR support down to 1.65V. Applications requiring 1.2V operation require confirmation of specific design requirements against available substitute specifications.

Q: Are all substitute parts available in the same packaging options?

A: All substitute parts use the 16-TSSOP package with identical 0.173" (4.40mm) width. Packaging options vary by manufacturer and part number: Tape & Reel (TR), Cut Tape (CT) & Digi-Reel, and Tube configurations are available across the substitute part list. Verify specific packaging availability with your supplier for procurement requirements.

Q: Is the CLVC138AQPWRG4Q1 suitable for non-automotive applications?

A: Yes. The CLVC138AQPWRG4Q1 provides the same decoder/demultiplexer functionality and electrical specifications as other 74LVC138 variants. The AEC-Q100 automotive qualification is an additional certification that does not restrict use in industrial or consumer applications. This part offers the advantage of extended temperature operation (-40°C to 125°C) matching the original part's thermal range.

Q: What is the impact of switching from Nexperia to Texas Instruments or onsemi parts?

A: All substitute parts maintain identical circuit function (1 x 3:8 decoder/demultiplexer), package type (16-TSSOP), output current (24mA), and RoHS3 compliance. The primary differences are product status (all substitutes are active), operating temperature ranges, and voltage supply minimums. No design changes are required for functional replacement within the specified electrical operating envelope.

Q: Can I use SN74LVC138APWG4 as a substitute?

A: The SN74LVC138APWG4 is listed as discontinued at DiGi Electronics, making it unsuitable for new procurement. Active alternatives with identical specifications include SN74LVC138APW, SN74LVC138APWR, and SN74LVC138APWT from Texas Instruments.

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