TRSF3238ECDB RS232 Transceiver Equivalent & Substitute Parts

Part Overview

The TRSF3238ECDB is a 5/3 full-duplex RS232 transceiver manufactured by Texas Instruments in a 28-SSOP surface mount package. This part is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production support. The device operates across a 3V to 5.5V supply range with a 1 Mbps data rate and 300 mV receiver hysteresis, designed for serial communication interface applications requiring full RS232 protocol compliance.

Substiute Parts

TRSF3238ECDB

Texas InstrumentsIn Stock: 952TRSF3238ECDB Datasheet

Current PartRFQ

TRSF3238EIDBR

Texas InstrumentsIn Stock: 1173TRSF3238EIDBR Datasheet

DirectRFQ

MAX3238ECAI+

Analog Devices Inc./Maxim IntegratedIn Stock: 25397MAX3238ECAI+ Datasheet

MFR RecommendedRFQ

MAX3238ECAI+T

Analog Devices Inc./Maxim IntegratedIn Stock: 3350MAX3238ECAI+T Datasheet

MFR RecommendedRFQ

MAX3238EEAI+

Analog Devices Inc./Maxim IntegratedIn Stock: 1242MAX3238EEAI+ Datasheet

MFR RecommendedRFQ

MAX3238EEAI+T

Analog Devices Inc./Maxim IntegratedIn Stock: 11723MAX3238EEAI+T Datasheet

MFR RecommendedRFQ

SP3238ECA-L/TR

MaxLinear, Inc.In Stock: 1434SP3238ECA-L/TR Datasheet

MFR RecommendedRFQ

SP3238EEA-L/TR

MaxLinear, Inc.In Stock: 20979SP3238EEA-L/TR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the TRSF3238ECDB is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Protocol: RS232
• Number of Drivers/Receivers: 5/3
• Duplex: Full
• Package / Case: 28-SSOP (0.209", 5.30mm Width)
• Mounting Type: Surface Mount
• Voltage Supply Range: 3V ~ 5.5V

Allowable Variations:

• Data Rate: Substitute parts may have equal or lower data rates (1 Mbps or 250 kbps)
• Receiver Hysteresis: Substitute parts may have equal or higher hysteresis values (300 mV, 500 mV, or 600 mV)
• Operating Temperature: Substitute parts may have extended temperature ranges (-40°C ~ 85°C vs. 0°C ~ 70°C)
• Product Status: Active parts are preferred over obsolete parts
• Manufacturer: Different manufacturers acceptable if all electrical and mechanical parameters align

All substitute parts listed meet these criteria and are direct functional equivalents for the TRSF3238ECDB.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: TRSF3238EIDBR

The TRSF3238EIDBR is the direct Texas Instruments equivalent with identical electrical performance (1 Mbps data rate, 300 mV receiver hysteresis) and maintains the same 28-SSOP package. This part is active in production and offers extended operating temperature range (-40°C ~ 85°C), providing superior reliability for applications requiring wider temperature operation. ROHS3 compliance and unlimited moisture sensitivity level are maintained.

Secondary Recommendations: MAX3238 Series (Analog Devices Inc./Maxim Integrated)

The MAX3238ECAI+, MAX3238ECAI+T, MAX3238EEAI+, and MAX3238EEAI+T variants are functionally equivalent with reduced data rate (250 kbps) and increased receiver hysteresis (600 mV). These parts are active in production with high inventory availability. Selection between these variants depends on packaging requirements (Tube vs. Cut Tape) and operating temperature range needs. All maintain ROHS3 compliance.

Tertiary Recommendations: SP3238 Series (MaxLinear, Inc.)

The SP3238ECA-L/TR and SP3238EEA-L/TR are functionally equivalent with reduced data rate (250 kbps) and moderate receiver hysteresis (500 mV). These parts are active in production. The SP3238EEA-L/TR offers extended operating temperature range (-40°C ~ 85°C) with the highest inventory availability (20,890 pcs). ROHS3 compliance is maintained.

All recommended substitutes are REACH Unaffected and classified as EAR99 for export control purposes.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with a lower data rate than the original TRSF3238ECDB?

A: Yes. The TRSF3238ECDB operates at 1 Mbps, while substitute parts such as the MAX3238 and SP3238 series operate at 250 kbps. A lower data rate is acceptable for substitution because it represents a more conservative operating point. If your application requires the full 1 Mbps capability, the TRSF3238EIDBR maintains this specification.

Q: What is the difference between receiver hysteresis values across substitute parts?

A: Receiver hysteresis determines the voltage difference required between logic high and low thresholds. The original TRSF3238ECDB specifies 300 mV. Substitute parts offer 500 mV (SP3238 series) or 600 mV (MAX3238 series). Higher hysteresis values provide improved noise immunity and are acceptable for substitution. Selection depends on your application's noise environment and signal integrity requirements.

Q: Are all substitute parts available in the same 28-SSOP package?

A: Yes. All substitute parts listed are packaged in 28-SSOP (0.209", 5.30mm Width) surface mount configuration, ensuring mechanical and electrical compatibility with existing PCB designs. Packaging variants (Tube, Cut Tape, Digi-Reel) differ only in supply format and do not affect component functionality.

Q: Which substitute part should I choose for extended temperature applications?

A: For applications requiring operation beyond the original 0°C ~ 70°C range, select parts with -40°C ~ 85°C operating temperature: TRSF3238EIDBR, MAX3238EEAI+, MAX3238EEAI+T, or SP3238EEA-L/TR. These parts maintain full RS232 functionality across the extended temperature range while preserving ROHS3 compliance.

Q: Is the TRSF3238EIDBR a direct replacement for the TRSF3238ECDB?

A: Yes. The TRSF3238EIDBR is the direct active equivalent from Texas Instruments with identical electrical specifications (1 Mbps data rate, 300 mV receiver hysteresis, 5/3 full-duplex RS232) and identical 28-SSOP package. The primary difference is extended operating temperature range (-40°C ~ 85°C vs. 0°C ~ 70°C) and active product status.

Q: Do all substitute parts maintain RoHS compliance?

A: Yes. All substitute parts listed are RoHS compliant (ROHS3 or RoHS Compliant designation). The original TRSF3238ECDB is ROHS3 Compliant, and all substitutes maintain equivalent or superior compliance status.