TRSF3232CDWR RS232 Transceiver Equivalent & Substitute Parts

Part Overview

The TRSF3232CDWR is a 2/2 full-duplex RS232 transceiver manufactured by Texas Instruments, housed in a 16-SOIC surface mount package. This interface IC operates across a 3V to 5.5V supply range and supports data rates up to 1 Mbps with a 300 mV receiver hysteresis specification. The part is currently classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity.

Substiute Parts

TRSF3232CDWR

Texas InstrumentsIn Stock: 962TRSF3232CDWR Datasheet

Current PartRFQ

SN75C3232DWR

Texas InstrumentsIn Stock: 5916SN75C3232DWR Datasheet

Parametric EquivalentRFQ

SN75C3232EDWR

Texas InstrumentsIn Stock: 6531SN75C3232EDWR Datasheet

Parametric EquivalentRFQ

TRSF3232ECDWR

Texas InstrumentsIn Stock: 9825TRSF3232ECDWR Datasheet

Parametric EquivalentRFQ

MAX3232ECWE+

Analog Devices Inc./Maxim IntegratedIn Stock: 2308MAX3232ECWE+ Datasheet

DirectRFQ

MAX3232ECWE+T

Analog Devices Inc./Maxim IntegratedIn Stock: 2190MAX3232ECWE+T Datasheet

DirectRFQ

ICL3232CBNZ

Renesas Electronics CorporationIn Stock: 9936ICL3232CBNZ Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TRSF3232CDWR is determined by the following critical parameters:

Primary Substitution Criteria:

• Protocol: RS232
• Number of Drivers/Receivers: 2/2
• Duplex: Full
• Package / Case: 16-SOIC (0.295", 7.50mm Width)
• Voltage - Supply: 3V ~ 5.5V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• RoHS Status: ROHS3 Compliant

Secondary Compatibility Parameters:

• Data Rate: 1 Mbps (minimum requirement)
• Receiver Hysteresis: 300 mV (standard specification)

Substitute parts are grouped into three categories based on their relationship to the main part:

Parametric Equivalents (SN75C3232DWR, SN75C3232EDWR, TRSF3232ECDWR): These parts match all primary substitution criteria and maintain identical electrical specifications. They differ only in product status and packaging format (Tape & Reel).

Direct Substitutes (MAX3232ECWE+, MAX3232ECWE+T): These Analog Devices/Maxim Integrated parts satisfy all primary criteria with one exception: receiver hysteresis is specified at 500 mV rather than 300 mV. This higher hysteresis value does not prevent functional substitution in standard RS232 applications.

Manufacturer-Recommended Alternative (ICL3232CBNZ): This Renesas Electronics part meets all primary criteria but exhibits two parameter deviations: reduced data rate (250 kbps versus 1 Mbps) and different package width (0.154" versus 0.295"). The MSL rating also differs (3 versus 1).

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Highest Compatibility):

The parametric equivalents SN75C3232DWR, SN75C3232EDWR, and TRSF3232ECDWR provide the most direct substitution path. All three are Texas Instruments products with identical electrical specifications to the TRSF3232CDWR. The primary distinction is product status: these parts are classified as Last Time Buy rather than obsolete, indicating extended availability. TRSF3232ECDWR offers the highest inventory level (9,787 pieces) among the parametric equivalents.

For Long-Term Production Support:

The MAX3232ECWE+ and MAX3232ECWE+T from Analog Devices/Maxim Integrated are active products with ongoing manufacturing support. Both parts maintain full compatibility with the primary substitution criteria. The 500 mV receiver hysteresis specification (versus 300 mV on the original part) represents a higher noise margin and does not compromise functional compatibility in standard RS232 interface applications. MAX3232ECWE+ is supplied in Tube packaging, while MAX3232ECWE+T is available in Cut Tape and Digi-Reel format.

For Applications with Reduced Data Rate Requirements:

The ICL3232CBNZ from Renesas Electronics is an active product suitable for applications where the 250 kbps data rate specification is sufficient. This part exhibits a narrower package width (0.154" versus 0.295"), which may require PCB layout verification. The MSL rating of 3 (168 hours) requires stricter moisture control during storage and assembly compared to MSL 1 parts.

Compliance and Certification:

All substitute parts maintain ROHS3 compliance and REACH unaffected status, matching the regulatory profile of the original TRSF3232CDWR.

Frequently Asked Questions (FAQ)

Q: Can MAX3232ECWE+ be used as a direct replacement for TRSF3232CDWR?

A: Yes. The MAX3232ECWE+ satisfies all primary substitution criteria: RS232 protocol, 2/2 driver/receiver configuration, full-duplex operation, 16-SOIC package with 0.295" width, 3V to 5.5V supply range, and 0°C to 70°C operating temperature. The 500 mV receiver hysteresis is higher than the original 300 mV specification but does not prevent functional substitution in standard RS232 applications. The part is actively manufactured by Analog Devices/Maxim Integrated.

Q: What is the difference between the parametric equivalents (SN75C3232DWR, SN75C3232EDWR, TRSF3232ECDWR)?

A: These three parts are electrically identical to the TRSF3232CDWR and to each other. All maintain 300 mV receiver hysteresis, 1 Mbps data rate, and identical package specifications. The differences are limited to product status (all are Last Time Buy) and packaging format (Tape & Reel). Selection among these three should be based on inventory availability and packaging requirements for your assembly process.

Q: Why does ICL3232CBNZ have a different package width?

A: The ICL3232CBNZ is specified with a 16-SOIC package measuring 0.154" width, compared to 0.295" for the TRSF3232CDWR. This narrower package is a physical characteristic of the Renesas device. PCB layout verification is required to confirm that the narrower package footprint is compatible with your existing design. The reduced data rate (250 kbps) may also limit suitability for high-speed RS232 applications.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed maintain ROHS3 compliance and REACH unaffected status, matching the regulatory requirements of the original TRSF3232CDWR.

Q: What does "Last Time Buy" product status mean?

A: Last Time Buy indicates that the manufacturer has announced end-of-life for the part. Inventory is available but will not be replenished after existing stock is exhausted. For long-term production support, active products such as MAX3232ECWE+ or ICL3232CBNZ are recommended.

Q: Does the higher receiver hysteresis on MAX3232ECWE+ affect signal integrity?

A: The 500 mV hysteresis on MAX3232ECWE+ versus 300 mV on TRSF3232CDWR represents a higher noise margin. This specification difference does not degrade signal integrity in standard RS232 applications and may provide improved noise immunity in electrically noisy environments.

Q: What is the MSL rating and why does it matter?

A: MSL (Moisture Sensitivity Level) indicates how long a component can be exposed to ambient moisture before assembly. TRSF3232CDWR, parametric equivalents, and MAX3232 variants have MSL 1 (unlimited exposure). ICL3232CBNZ has MSL 3 (168 hours maximum), requiring stricter moisture control during storage and assembly. If your facility does not maintain controlled humidity storage, MSL 1 parts are preferred.