74HC238DB,112 Equivalent & Substitute Parts

Part Overview

The 74HC238DB,112 is a decoder/demultiplexer integrated circuit manufactured by Nexperia USA Inc., featuring a 1 x 3:8 logic configuration in a 16-SSOP surface mount package. This component is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity. The part operates across a 2V to 6V supply range with symmetric output current characteristics, suitable for standard logic-level applications requiring address decoding or signal demultiplexing functions.

Substiute Parts

74HC238DB,112

Nexperia USA Inc.In Stock: 74374HC238DB,112 Datasheet

Current PartRFQ

CD74HC238PWR

Texas InstrumentsIn Stock: 17985CD74HC238PWR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 74HC238DB,112 is determined by the following critical parameters:

• Logic Function: Decoder/Demultiplexer with 1 x 3:8 circuit configuration
• Voltage Supply Range: 2V ~ 6V operation
• Output Current Characteristics: 5.2mA high and low output current
• Series Compatibility: 74HC logic family
• Mounting Technology: Surface mount configuration
• Compliance Standards: ROHS3 compliance and REACH unaffected status

The CD74HC238PWR from Texas Instruments satisfies all functional and electrical requirements for direct substitution. Both parts share identical logic specifications, voltage supply parameters, and output current ratings. The primary distinction lies in package geometry and product lifecycle status.

Parameter Comparison

Engineering Selection Recommendations

The CD74HC238PWR qualifies as a direct functional substitute for the 74HC238DB,112 based on matching electrical specifications and compliance certifications. Both parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment for production environments.

The CD74HC238PWR offers the advantage of active product status with established supply availability, addressing the obsolescence constraint of the original part. The extended operating temperature range (-55°C to 125°C versus -40°C to 125°C) provides additional thermal margin for demanding applications.

Package geometry differs between the two parts: the 74HC238DB,112 uses 16-SSOP (5.30mm width) while the CD74HC238PWR uses 16-TSSOP (4.40mm width). This dimensional variance requires PCB layout verification to confirm footprint compatibility before design implementation.

Frequently Asked Questions (FAQ)

Q: Can the CD74HC238PWR directly replace the 74HC238DB,112 without circuit modifications?

A: Electrical and functional compatibility is confirmed. Pin configuration and logic behavior are identical. PCB footprint verification is required due to package width differences (5.30mm versus 4.40mm).

Q: What is the primary reason for seeking a substitute for the 74HC238DB,112?

A: The 74HC238DB,112 carries obsolete product status. The CD74HC238PWR maintains active production status with established supply channels.

Q: Are there compliance or certification differences between these parts?

A: Both parts maintain ROHS3 compliance and REACH unaffected status. No compliance barriers exist for substitution.

Q: How do the operating temperature ranges compare?

A: The CD74HC238PWR supports -55°C to 125°C operation, extending the lower temperature limit by 15°C compared to the 74HC238DB,112 (-40°C to 125°C). Both meet standard industrial temperature requirements.

Q: What packaging considerations apply to this substitution?

A: The primary consideration is package footprint. The TSSOP package (4.40mm width) is narrower than the SSOP package (5.30mm width). Verify PCB layout compatibility before component procurement.