MAX238C/D Equivalent & Substitute Parts

Part Overview

The MAX238C/D is a 4/4 transceiver full RS232 die manufactured by Analog Devices Inc./Maxim Integrated. This component functions as a complete RS232 interface solution with four drivers and four receivers, operating at a data rate of 120 Kbps. The part is currently classified as obsolete, making identification of suitable substitute components essential for ongoing system support and new design implementations. The die form factor limits direct application in standard PCB assembly, necessitating evaluation of packaged alternatives that maintain functional equivalence.

Substiute Parts

MAX238C/D

Analog Devices Inc./Maxim IntegratedIn Stock: 735MAX238C/D Datasheet

Current PartRFQ

MAX238EWG+

Analog Devices Inc./Maxim IntegratedIn Stock: 2012MAX238EWG+ Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MAX238C/D is determined by strict equivalence across the following critical parameters:

• Functional Core: Transceiver type with RS232 protocol, 4/4 driver/receiver configuration, and full duplex operation
• Electrical Specifications: Receiver hysteresis of 500 mV, data rate of 120 Kbps, and supply voltage range of 4.5V ~ 5.5V
• Compliance & Environmental: ROHS3 compliance, REACH unaffected status, and MSL rating of 1 (Unlimited)
• Manufacturer Continuity: Same manufacturer (Analog Devices Inc./Maxim Integrated) and same base product number (MAX238)

The MAX238EWG+ qualifies as a direct substitute based on these parameters. The primary difference is the package form factor: the substitute transitions from die form to 24-SOIC (0.295", 7.50mm Width), enabling standard PCB assembly. The substitute maintains all functional and electrical specifications while extending the operating temperature range to -40°C ~ 85°C and transitioning from obsolete to active product status.

Parameter Comparison

Engineering Selection Recommendations

The MAX238EWG+ is the appropriate substitute for the obsolete MAX238C/D based on the following engineering criteria:

Product Status & Availability: The MAX238C/D is classified as obsolete, while the MAX238EWG+ maintains active product status with documented inventory availability. This transition ensures long-term supply chain viability and access to manufacturer support.

Compliance & Certification: Both components maintain ROHS3 compliance and REACH unaffected status, satisfying regulatory requirements for electronic component deployment. MSL rating of 1 (Unlimited) on both parts indicates equivalent moisture handling and storage requirements.

Functional Equivalence: The substitute preserves all critical electrical and functional parameters: 4/4 transceiver configuration, RS232 protocol, 500 mV receiver hysteresis, 120 Kbps data rate, and 4.5V ~ 5.5V supply voltage range. These specifications ensure direct functional replacement in existing circuit designs.

Package Consideration: The transition from die to 24-SOIC package form factor requires PCB layout modification but enables standard surface mount assembly processes. The 24-SOIC package is a widely supported industry standard, reducing manufacturing complexity compared to die-level integration.

Frequently Asked Questions (FAQ)

Q: Can the MAX238EWG+ directly replace the MAX238C/D in existing designs?

A: The MAX238EWG+ provides functional equivalence across all electrical and protocol specifications. However, the package form factor differs: the original is a die, while the substitute is a 24-SOIC package. PCB layout and assembly processes must be adapted accordingly. No circuit-level modifications are required if the 24-SOIC footprint is accommodated.

Q: What is the significance of the operating temperature range difference?

A: The MAX238C/D operates from 0°C ~ 70°C, while the MAX238EWG+ extends to -40°C ~ 85°C. The substitute provides a wider operating envelope. Applications requiring the original 0°C ~ 70°C range will function within the substitute's specifications. Applications requiring extended low-temperature operation benefit from the substitute's expanded range.

Q: Are there any compliance or regulatory differences between these parts?

A: Both components maintain identical compliance status: ROHS3 compliant, REACH unaffected, and MSL 1 (Unlimited). No regulatory or compliance barriers exist for substitution.

Q: Why is the MAX238C/D classified as obsolete?

A: The die form factor represents a specialized packaging approach. The MAX238EWG+ in 24-SOIC packaging represents the current production standard for this transceiver function, reflecting industry-wide transition to standardized package forms for improved manufacturability and supply chain efficiency.

Q: What packaging format should be specified for new designs?

A: The MAX238EWG+ in 24-SOIC package format is the active product offering. New designs should specify this part number to ensure long-term availability and manufacturer support.