SN74LVC138APWRE4 Equivalent & Substitute Parts

Part Overview

The SN74LVC138APWRE4 is a decoder/demultiplexer logic integrated circuit manufactured by Texas Instruments, featuring a 1 x 3:8 circuit configuration in a 16-TSSOP surface mount package. This part is discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives from active product lines. Substitute parts maintain identical decoder/demultiplexer functionality and package specifications while offering continued availability and supply chain reliability.

Substiute Parts

SN74LVC138APWRE4

Texas InstrumentsIn Stock: 1097SN74LVC138APWRE4 Datasheet

Current PartRFQ

SN74LVC138APWR

Texas InstrumentsIn Stock: 4191SN74LVC138APWR Datasheet

MFR RecommendedRFQ

SN74LVC138APWT

Texas InstrumentsIn Stock: 5706SN74LVC138APWT Datasheet

Parametric EquivalentRFQ

MC74LCX138DTR2G

onsemiIn Stock: 3385MC74LCX138DTR2G Datasheet

DirectRFQ

74LCX138MTCX

onsemiIn Stock: 1078274LCX138MTCX Datasheet

MFR RecommendedRFQ

74LVC138APW,118

Nexperia USA Inc.In Stock: 1302574LVC138APW,118 Datasheet

MFR RecommendedRFQ

MC74LCX138DTG

onsemiIn Stock: 4222MC74LCX138DTG Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following criteria:

Mandatory Matching Parameters:

• Type: Decoder/Demultiplexer
• Circuit Configuration: 1 x 3:8
• Independent Circuits: 1
• Current - Output High, Low: 24mA, 24mA
• Voltage Supply Source: Single Supply
• Mounting Type: Surface Mount
• Package / Case: 16-TSSOP (0.173", 4.40mm Width)
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

Allowable Variation Parameters:

• Voltage - Supply: Minimum voltage may vary (1.2V to 2V lower bound; 3.6V upper bound maintained)
• Operating Temperature: Range may extend (maximum to 125°C acceptable)
• Packaging Format: Cut Tape (CT), Tape & Reel (TR), or Tube acceptable
• Product Status: Active status preferred over discontinued
• Manufacturer: Texas Instruments, onsemi, or Nexperia USA Inc.

All identified substitutes meet these criteria and are functionally interchangeable at the circuit level.

Parameter Comparison

Engineering Selection Recommendations

Texas Instruments 74LVC Series (SN74LVC138APWR, SN74LVC138APWT): These parts maintain identical electrical specifications to the original SN74LVC138APWRE4, including voltage supply range (1.65V ~ 3.6V) and operating temperature (-40°C ~ 85°C). Both are active products with ROHS3 compliance and MSL 1 rating. Selection between these variants depends on packaging requirements: SN74LVC138APWR is supplied in Cut Tape and Digi-Reel format, while SN74LVC138APWT is supplied in Tape & Reel format.

onsemi 74LCX Series (MC74LCX138DTR2G, 74LCX138MTCX, MC74LCX138DTG): These parts are functionally equivalent with identical output current specifications (24mA, 24mA) and operating temperature range (-40°C ~ 85°C). The voltage supply range is 2V ~ 3.6V, which is compatible with applications operating above 2V. All three variants are active products with ROHS3 compliance and MSL 1 rating. Selection depends on packaging format: MC74LCX138DTR2G (Tape & Reel), 74LCX138MTCX (Cut Tape & Digi-Reel), or MC74LCX138DTG (Tube).

Nexperia USA Inc. 74LVC Series (74LVC138APW,118): This part offers extended operating temperature range (-40°C ~ 125°C) and lower minimum voltage supply (1.2V ~ 3.6V), providing broader application compatibility. It is an active product with ROHS3 compliance and MSL 1 rating, supplied in Cut Tape and Digi-Reel format.

All substitutes maintain identical decoder/demultiplexer functionality, circuit configuration (1 x 3:8), and 16-TSSOP package specifications. Selection should be based on voltage supply requirements of the target application, required operating temperature range, and preferred packaging format for procurement and assembly processes.

Frequently Asked Questions (FAQ)

Q: Can SN74LVC138APWR directly replace SN74LVC138APWRE4? A: Yes. Both parts are Texas Instruments 74LVC series decoders with identical electrical specifications (1.65V ~ 3.6V supply, -40°C ~ 85°C operating range, 24mA output current). The primary difference is packaging format: APWR is supplied in Cut Tape and Digi-Reel, while APWRE4 was supplied in a specific reel configuration. Pin configuration and functional behavior are identical.

Q: What is the difference between 74LVC and 74LCX series substitutes? A: Both series are decoder/demultiplexer logic circuits with identical circuit configuration (1 x 3:8) and output current specifications (24mA, 24mA). The 74LCX series has a minimum voltage supply of 2V, while 74LVC series operates from 1.65V or 1.2V. For applications requiring operation below 2V, 74LVC series parts are required. For applications operating at 2V or above, both series are functionally equivalent.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All identified substitute parts carry ROHS3 compliance certification and MSL 1 (Unlimited) moisture sensitivity rating, matching the original SN74LVC138APWRE4 specifications.

Q: What packaging formats are available for these substitutes? A: Substitute parts are available in three packaging formats: Cut Tape (CT) & Digi-Reel, Tape & Reel (TR), and Tube. Selection depends on assembly process requirements and procurement volume. Cut Tape and Digi-Reel formats are suitable for lower-volume or mixed-component orders, while Tape & Reel format is optimized for high-volume automated assembly. Tube packaging is available for specific applications.

Q: Does the Nexperia 74LVC138APW,118 offer any advantages? A: The Nexperia part extends the operating temperature range to -40°C ~ 125°C and supports lower minimum voltage supply (1.2V). These specifications provide broader application compatibility for designs requiring extended temperature operation or lower supply voltage operation. Electrical performance and package specifications remain identical to other 74LVC variants.

Q: Are there any compatibility concerns when switching between manufacturers? A: No. All substitute parts maintain identical pin configuration, circuit functionality, and electrical specifications within their respective voltage and temperature ranges. Switching between Texas Instruments, onsemi, and Nexperia variants does not require circuit redesign or board layout modifications.