CD74HC238M Equivalent & Substitute Parts

Part Overview

The CD74HC238M is a decoder/demultiplexer logic integrated circuit manufactured by Texas Instruments in a 16-SOIC surface mount package. This component implements a 1 x 3:8 decoder/demultiplexer function with single supply operation. The CD74HC238M is currently discontinued at DiGi Electronics, making equivalent substitute parts necessary for ongoing design and production requirements. Suitable alternatives maintain identical electrical specifications and package compatibility while offering active product status from alternative manufacturers.

Substiute Parts

CD74HC238M

Texas InstrumentsIn Stock: 1457CD74HC238M Datasheet

Current PartRFQ

CD74HC238M96

Texas InstrumentsIn Stock: 16476CD74HC238M96 Datasheet

DirectRFQ

CD74HC138M

Harris CorporationIn Stock: 1262CD74HC138M Datasheet

Parametric EquivalentRFQ

MC74HC238ADR2G

onsemiIn Stock: 1860MC74HC238ADR2G Datasheet

DirectRFQ

74HC238D,653

NXP SemiconductorsIn Stock: 240874HC238D,653 Datasheet

MFR RecommendedRFQ

74HC238D-Q100J

Nexperia USA Inc.In Stock: 324574HC238D-Q100J Datasheet

MFR RecommendedRFQ

M74HC238RM13TR

STMicroelectronicsIn Stock: 17725M74HC238RM13TR Datasheet

MFR RecommendedRFQ

MC74HC138ADG

onsemiIn Stock: 3615MC74HC138ADG Datasheet

Parametric EquivalentRFQ

MC74HC238ADG

onsemiIn Stock: 1298MC74HC238ADG Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CD74HC238M are classified based on strict electrical and mechanical parameter matching:

Substitution Criteria:

• Circuit configuration: 1 x 3:8 decoder/demultiplexer
• Output current specifications: 5.2mA high, 5.2mA low
• Supply voltage range: 2V ~ 6V
• Package type: 16-SOIC surface mount
• Operating temperature range: -55°C ~ 125°C or -40°C ~ 125°C
• RoHS3 compliance status

Direct Manufacturer Substitutes maintain identical part specifications across all electrical and mechanical parameters, differing only in packaging format (tube, cut tape, or tape & reel) or manufacturer designation.

Parametric Equivalents share all critical electrical specifications and package dimensions but may originate from different manufacturers or represent alternative base product numbers within the 74HC logic family (74HC138 vs 74HC238 variants).

Parameter Comparison

Engineering Selection Recommendations

Preferred Primary Substitutes:

CD74HC238M96 (Texas Instruments) and MC74HC238ADR2G (onsemi) are the optimal direct replacements. Both maintain identical electrical specifications, package dimensions, and RoHS3 compliance. CD74HC238M96 offers the advantage of remaining within the original manufacturer ecosystem, while MC74HC238ADR2G provides active product status with established supply availability.

Secondary Active Alternatives:

MC74HC238ADG (onsemi) and 74HC238D,653 (NXP Semiconductors) provide equivalent functionality with active product status. The NXP variant includes automotive-grade qualification (AEC-Q100) in the 74HC238D-Q100J configuration, suitable for applications requiring automotive reliability standards.

Avoid:

CD74HC138M (Harris Corporation) and M74HC238RM13TR (STMicroelectronics) are obsolete products with limited availability. The CD74HC138M additionally carries RoHS non-compliance status, making it unsuitable for new designs requiring regulatory compliance.

Frequently Asked Questions (FAQ)

Q: Can I use MC74HC138ADG as a substitute for CD74HC238M?

A: MC74HC138ADG is a parametric equivalent with identical electrical specifications and package dimensions. The base product number differs (74HC138 vs 74HC238), but both implement 1 x 3:8 decoder/demultiplexer functions with matching output current, supply voltage, and operating temperature ranges. Functional compatibility is confirmed by electrical parameter alignment.

Q: What is the difference between CD74HC238M and CD74HC238M96?

A: Both parts are manufactured by Texas Instruments with identical electrical specifications. The primary difference is packaging format: CD74HC238M is supplied in tube packaging, while CD74HC238M96 is supplied in cut tape and Digi-Reel format. CD74HC238M96 is currently active in production, whereas CD74HC238M is discontinued.

Q: Are the NXP 74HC238D variants suitable for my application?

A: NXP 74HC238D,653 and 74HC238D-Q100J maintain all critical electrical parameters matching the CD74HC238M. The operating temperature range is -40°C to 125°C (versus -55°C to 125°C for the original). Verify your application's minimum operating temperature requirement before selection. The 74HC238D-Q100J includes AEC-Q100 automotive qualification if required.

Q: Why is the operating temperature range different for some substitutes?

A: NXP and Nexperia variants specify -40°C to 125°C operating range, while Texas Instruments, onsemi, and STMicroelectronics variants specify -55°C to 125°C. Both ranges satisfy standard industrial applications. Select based on your specific minimum operating temperature requirement.

Q: Is RoHS compliance important for my selection?

A: All recommended active substitutes carry ROHS3 compliance status. If your application or supply chain requires RoHS compliance, avoid CD74HC138M (Harris Corporation, non-compliant) and M74HC238RM13TR (obsolete status). Preferred substitutes CD74HC238M96 and MC74HC238ADR2G both meet ROHS3 requirements.

Q: Can I mix different manufacturers in the same production run?

A: All recommended substitutes maintain identical electrical specifications and 16-SOIC package dimensions, enabling functional interchangeability. Verify with your assembly partner regarding any internal qualification requirements for multiple manufacturer sources within a single production batch.