SP3239EEA-L Equivalent & Substitute Parts

Part Overview

The SP3239EEA-L is a full-duplex RS232 transceiver IC featuring 5 drivers and 3 receivers in a 28-SSOP surface mount package. This component is designed for serial communication applications requiring bidirectional data transmission at up to 250 kbps across supply voltages ranging from 3V to 5.5V. The part is currently discontinued at DiGi Electronics, making identification of equivalent alternatives essential for ongoing design support and production continuity.

Substiute Parts

SP3239EEA-L

MaxLinear, Inc.In Stock: 3121SP3239EEA-L Datasheet

Current PartRFQ

MAX3237EEAI+

Analog Devices Inc./Maxim IntegratedIn Stock: 2203MAX3237EEAI+ Datasheet

Parametric EquivalentRFQ

MAX3250EAI+

Analog Devices Inc./Maxim IntegratedIn Stock: 2363MAX3250EAI+ Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SP3239EEA-L is determined by strict alignment of the following critical parameters:

• Package / Case: 28-SSOP form factor with identical 0.209" (5.30mm) width
• Protocol: RS232 full-duplex transceiver functionality
• Voltage Supply Range: 3V ~ 5.5V compatibility
• Operating Temperature Range: -40°C ~ 85°C
• Data Rate: 250 kbps minimum capability
• Receiver Hysteresis: 500 mV specification
• Mounting Type: Surface mount configuration

The substitute parts identified below meet these core electrical and mechanical requirements. However, the number of drivers and receivers may differ, which affects channel capacity and application suitability.

Parameter Comparison

Engineering Selection Recommendations

MAX3237EEAI+ (Primary Equivalent)

The MAX3237EEAI+ is a parametric equivalent offering identical driver/receiver configuration (5/3) to the SP3239EEA-L. This part maintains full electrical and mechanical compatibility across all specified parameters. The MAX3237EEAI+ carries Active product status with ROHS3 compliance and improved moisture sensitivity rating (MSL 1, Unlimited versus MSL 2, 1 Year), providing superior long-term reliability for storage and field deployment.

MAX3250EAI+ (Functional Alternative)

The MAX3250EAI+ provides a reduced-channel alternative with 2 drivers and 2 receivers instead of 5/3. This part is suitable only for applications requiring fewer serial communication channels. All other electrical specifications, package dimensions, and compliance certifications remain equivalent. The MAX3250EAI+ is also Active with ROHS3 compliance and MSL 1 rating.

Both substitute parts are manufactured by Analog Devices Inc./Maxim Integrated and are currently in active production with confirmed inventory availability.

Frequently Asked Questions (FAQ)

Q: Can MAX3237EEAI+ be used as a direct replacement for SP3239EEA-L?

A: Yes. The MAX3237EEAI+ matches all critical electrical and mechanical parameters including 5/3 driver/receiver configuration, 28-SSOP package, RS232 protocol, 250 kbps data rate, 3V–5.5V supply range, and -40°C to 85°C operating temperature. No circuit modifications are required.

Q: What is the key difference between MAX3237EEAI+ and MAX3250EAI+?

A: The MAX3237EEAI+ provides 5 drivers and 3 receivers, matching the original SP3239EEA-L channel count. The MAX3250EAI+ provides only 2 drivers and 2 receivers. Selection depends on the number of serial communication channels required by your application.

Q: Are there any compliance or certification differences?

A: Both substitute parts carry ROHS3 compliance versus RoHS Compliant for the original part. Both are REACH Unaffected. The substitute parts have improved moisture sensitivity ratings (MSL 1, Unlimited) compared to the original (MSL 2, 1 Year), which is advantageous for long-term storage and field reliability.

Q: Is the 28-SSOP package identical across all three parts?

A: Yes. All three parts use the 28-SSOP package with 0.209" (5.30mm) width. PCB footprints and assembly processes are identical.

Q: What is the current availability status of these parts?

A: The SP3239EEA-L is discontinued at DiGi Electronics. Both MAX3237EEAI+ and MAX3250EAI+ are Active products with confirmed inventory in stock (2156 and 2318 units respectively).