74HC238N,652 Equivalent & Substitute Parts

Part Overview

The 74HC238N,652 is a decoder/demultiplexer logic integrated circuit manufactured by NXP USA Inc. in a 16-DIP through-hole package. This component implements a 1 x 3:8 decoder function with single supply operation across a 2V to 6V voltage range. The part is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing system support and new design implementations.

Substiute Parts

74HC238N,652

NXP USA Inc.In Stock: 245674HC238N,652 Datasheet

Current PartRFQ

CD74HC238E

Texas InstrumentsIn Stock: 33237CD74HC238E Datasheet

UpgradeRFQ

74HC238D,653

NXP SemiconductorsIn Stock: 240874HC238D,653 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 74HC238N,652 is determined by the following critical parameters:

Functional Equivalence: All substitute parts must implement the identical 1 x 3:8 decoder/demultiplexer circuit configuration with matching output current specifications (5.2mA high and low).

Electrical Compatibility: Voltage supply range (2V ~ 6V) and output current ratings must be maintained or exceeded. Operating temperature range may be extended without affecting compatibility.

Mechanical Compatibility: Package type determines mounting method. Through-hole packages (DIP) are directly interchangeable in existing PCB designs. Surface-mount packages (SOIC) require PCB redesign and are suitable only for new layouts or rework scenarios.

Compliance and Status: All substitute parts must maintain ROHS3 compliance and REACH unaffected status. Active product status is preferred for long-term availability.

The 74HC238 base product number identifies the functional family. Variants with different suffixes (N, D, E) indicate different manufacturers or package types while maintaining core electrical specifications.

Parameter Comparison

Engineering Selection Recommendations

For Direct Through-Hole Replacement: The CD74HC238E from Texas Instruments provides pin-compatible substitution in the 16-DIP package. This part is currently active in production with extended operating temperature range (-55°C to 125°C), offering improved thermal margin over the obsolete 74HC238N,652. No PCB modifications are required.

For Surface-Mount Applications: The 74HC238D,653 from NXP Semiconductors implements the identical decoder function in a 16-SOIC surface-mount package. This option is suitable for new PCB designs or rework scenarios where surface-mount technology is preferred. The part maintains the original operating temperature specification and is actively manufactured.

Compliance Considerations: Both substitute parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment with the original component. Active product status for both alternatives supports long-term supply chain stability and design continuity.

Frequently Asked Questions (FAQ)

Q: Can the CD74HC238E directly replace the 74HC238N,652 in existing designs?

A: Yes. Both parts use the 16-DIP through-hole package with identical pinout and electrical specifications (1 x 3:8 decoder, 5.2mA output current, 2V-6V supply). No circuit modifications are required. The CD74HC238E has an extended operating temperature range (-55°C vs -40°C), which is compatible with the original specification.

Q: What is the difference between the CD74HC238E and 74HC238D,653?

A: The primary difference is package type. The CD74HC238E uses a 16-DIP through-hole package for direct PCB replacement. The 74HC238D,653 uses a 16-SOIC surface-mount package, requiring PCB redesign. Both implement identical decoder functionality and electrical specifications.

Q: Why is the 74HC238N,652 listed as obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. Active alternatives (CD74HC238E and 74HC238D,653) provide equivalent functionality and are currently manufactured, ensuring availability for replacement and new designs.

Q: Are there any electrical differences between these parts?

A: No. All three parts share identical output current ratings (5.2mA), voltage supply range (2V-6V), and circuit configuration (1 x 3:8 decoder). The CD74HC238E offers an extended operating temperature range (-55°C to 125°C) compared to the original specification (-40°C to 125°C).

Q: Which substitute should I select for a new design?

A: Selection depends on mounting technology requirements. For through-hole designs, use CD74HC238E. For surface-mount designs, use 74HC238D,653. Both are active products with full compliance certifications.

Q: Do all parts meet RoHS and REACH requirements?

A: Yes. The 74HC238N,652, CD74HC238E, and 74HC238D,653 are all ROHS3 compliant and REACH unaffected, meeting current regulatory standards.