MAX239EWG RS232 Transceiver - Equivalent & Substitute Parts

Part Overview

The MAX239EWG is a full-duplex RS232 transceiver IC manufactured by Analog Devices Inc./Maxim Integrated, configured with 3 drivers and 5 receivers in a 24-SOIC surface mount package. This component interfaces between TTL/CMOS logic levels and RS232 signal levels, supporting data rates up to 120 Kbps across bidirectional communication channels.

The MAX239EWG is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support long-term product maintenance and production requirements.

Substiute Parts

MAX239EWG

Analog Devices Inc./Maxim IntegratedIn Stock: 3213MAX239EWG Datasheet

Current PartRFQ

MAX239EWG+

Analog Devices Inc./Maxim IntegratedIn Stock: 1221MAX239EWG+ Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MAX239EWG is determined by strict equivalence across the following critical parameters:

• Protocol Compatibility: RS232 full-duplex transceiver functionality
• Channel Configuration: 3 drivers and 5 receivers
• Electrical Specifications: Supply voltage range (5V, 7.5V ~ 13.2V), data rate (120 Kbps), receiver hysteresis (500 mV), and operating temperature range (-40°C ~ 85°C)
• Package Specification: 24-SOIC surface mount package with identical physical dimensions (0.295", 7.50mm Width)

The MAX239EWG+ meets all these criteria and qualifies as a parametric equivalent substitute. Both parts share identical electrical performance characteristics and mechanical compatibility, enabling direct substitution in circuit designs.

Parameter Comparison

Engineering Selection Recommendations

The MAX239EWG+ is the direct substitute for the MAX239EWG. Both parts are electrically and mechanically identical across all specified parameters. The primary distinction is product lifecycle status: the MAX239EWG is obsolete, while the MAX239EWG+ maintains active production status.

The MAX239EWG+ offers improved regulatory compliance, meeting ROHS3 requirements compared to the non-compliant status of the original part. This substitution is suitable for new designs, production continuity, and legacy system maintenance where component availability is a concern.

Frequently Asked Questions (FAQ)

Q: Can the MAX239EWG+ be used as a direct replacement for the MAX239EWG?

A: Yes. The MAX239EWG+ is a parametric equivalent with identical electrical specifications, channel configuration (3/5 drivers/receivers), supply voltage range, data rate, operating temperature, and 24-SOIC package dimensions. Direct substitution is supported without circuit modification.

Q: What is the difference between MAX239EWG and MAX239EWG+?

A: The parts are electrically equivalent. The MAX239EWG is obsolete, while the MAX239EWG+ is in active production. The MAX239EWG+ also achieves ROHS3 compliance, whereas the original part is RoHS non-compliant.

Q: Are there any package or pinout differences?

A: No. Both parts use the identical 24-SOIC surface mount package with 0.295" width (7.50mm). Pinout and mechanical compatibility are fully preserved.

Q: What supply voltages are supported?

A: Both parts support dual supply operation at 5V or a split supply configuration ranging from 7.5V to 13.2V, enabling flexible power architecture integration.

Q: Is the MAX239EWG+ suitable for industrial temperature applications?

A: Yes. The operating temperature range of -40°C to 85°C covers industrial and extended commercial environments.