TRS3232IDR RS232 Transceiver Equivalent & Substitute Parts

Part Overview

The TRS3232IDR is a 2/2 full-duplex RS232 transceiver manufactured by Texas Instruments in a 16-SOIC surface mount package. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. The device operates across a 3V to 5.5V supply range with a 250 kbps data rate and supports the full RS232 protocol specification with 300 mV receiver hysteresis.

Key Parameters

Parameter	Value
Manufacturer Part Number	TRS3232IDR
Manufacturer	Texas Instruments
Type	Transceiver
Protocol	RS232
Number of Drivers/Receivers	2/2
Duplex	Full
Receiver Hysteresis	300 mV
Data Rate	250 kbps
Voltage - Supply	3V ~ 5.5V
Operating Temperature	-40°C ~ 85°C
Mounting Type	Surface Mount
Package / Case	16-SOIC (0.154", 3.90mm Width)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution for the TRS3232IDR is determined by strict equivalence across the following critical parameters:

Protocol: RS232 full-duplex transceiver
Driver/Receiver Configuration: 2/2 channels
Package Type: 16-SOIC surface mount
Supply Voltage Range: 3V ~ 5.5V
Operating Temperature Range: -40°C ~ 85°C (preferred for industrial applications)
Data Rate: 250 kbps minimum
RoHS3 Compliance: Required

Substitute parts are grouped into two categories:

Parametric Equivalents maintain identical electrical and thermal specifications with active product status, providing direct functional replacement.

Manufacturer Recommended Alternatives offer equivalent or enhanced performance with minor parameter variations (such as increased receiver hysteresis or data rate) while maintaining core RS232 transceiver functionality and package compatibility.

Parameter Comparison

Part Number	Manufacturer	Product Status	Drivers/Receivers	Data Rate	Receiver Hysteresis	Operating Temp	Package	RoHS Status	MSL
TRS3232IDR	Texas Instruments	Obsolete	2/2	250 kbps	300 mV	-40°C ~ 85°C	16-SOIC	ROHS3	1
MAX3232EIDR	Texas Instruments	Active	2/2	250 kbps	300 mV	-40°C ~ 85°C	16-SOIC	ROHS3	1
TRS3232EIDR	Texas Instruments	Active	2/2	250 kbps	300 mV	-40°C ~ 85°C	16-SOIC	ROHS3	1
ADM3232EARNZ-REEL7	Analog Devices Inc.	Active	2/2	460 kbps	500 mV	-40°C ~ 85°C	16-SOIC	ROHS3	1
ICL3232EIBNZ	Renesas Electronics	Active	2/2	250 kbps	500 mV	-40°C ~ 85°C	16-SOIC	ROHS3	3
ICL3232EIBNZ-T	Renesas Electronics	Active	2/2	250 kbps	500 mV	-40°C ~ 85°C	16-SOIC	ROHS3	3
ICL3232CBNZ	Renesas Electronics	Active	2/2	250 kbps	300 mV	0°C ~ 70°C	16-SOIC	ROHS3	3
ICL3232CBNZ-T	Renesas Electronics	Active	2/2	250 kbps	300 mV	0°C ~ 70°C	16-SOIC	ROHS3	3
ICL3232ECBNZ	Renesas Electronics	Active	2/2	250 kbps	500 mV	0°C ~ 70°C	16-SOIC	ROHS3	3
ICL3232ECBNZ-T	Renesas Electronics	Active	2/2	250 kbps	500 mV	0°C ~ 70°C	16-SOIC	ROHS3	3
ADM3232EARNZ	UMW	Active	2/2	235 kbps	300 mV	-40°C ~ 85°C	16-SOP	ROHS3	1

Engineering Selection Recommendations

Direct Parametric Equivalents (Preferred for Obsolete Part Replacement)

MAX3232EIDR and TRS3232EIDR are the primary substitutes for TRS3232IDR. Both maintain identical electrical specifications, operating temperature range (-40°C to 85°C), and MSL rating (1). Both are active products from Texas Instruments with ROHS3 compliance. TRS3232EIDR offers significantly higher inventory availability (634,478 units) compared to MAX3232EIDR (17,600 units), making it the optimal choice for production continuity.

Extended Temperature Range Alternatives

ADM3232EARNZ-REEL7 from Analog Devices provides enhanced performance with 460 kbps data rate and 500 mV receiver hysteresis while maintaining the full -40°C to 85°C operating range and MSL 1 rating. This part is suitable for applications requiring higher data throughput without thermal derating.

Commercial Temperature Range Alternatives

ICL3232 series parts from Renesas Electronics (CBNZ and ECBNZ variants) operate within a narrower 0°C to 70°C temperature range. These parts are suitable only for applications that do not require extended low-temperature operation. The EIBNZ variants extend the operating range to -40°C to 85°C, matching the original part's thermal envelope. All ICL3232 variants carry MSL 3 rating, requiring controlled moisture handling during storage and assembly.

Package Consideration

ADM3232EARNZ uses a 16-SOP package rather than 16-SOIC. While functionally equivalent, this package variant requires PCB layout modification and is not a direct pin-compatible substitute.

Frequently Asked Questions (FAQ)

Q: Can MAX3232EIDR directly replace TRS3232IDR without PCB modification?

A: Yes. MAX3232EIDR is pin-compatible with identical 16-SOIC packaging, electrical specifications, and operating temperature range. No PCB layout changes are required.

Q: What is the difference between TRS3232EIDR and MAX3232EIDR?

A: Both parts are parametrically identical with matching electrical specifications, package type, and operating range. The primary difference is manufacturer designation and inventory availability. TRS3232EIDR has substantially higher stock levels.

Q: Can ICL3232EIBNZ-T replace TRS3232IDR in industrial applications?

A: ICL3232EIBNZ-T is functionally compatible with identical data rate and operating temperature range. However, it carries MSL 3 rating versus MSL 1 for the original part, requiring stricter moisture control during storage and assembly. The 500 mV receiver hysteresis (versus 300 mV) provides improved noise immunity.

Q: Why do some substitutes have different operating temperature ranges?

A: ICL3232 CBNZ and ECBNZ variants are rated for 0°C to 70°C commercial temperature range, limiting their use to non-industrial applications. EIBNZ variants extend to -40°C to 85°C, matching the original part's industrial temperature specification.

Q: Is ADM3232EARNZ a suitable substitute despite the 16-SOP package?

A: ADM3232EARNZ provides equivalent electrical functionality but requires PCB redesign due to 16-SOP packaging. It is suitable only when PCB modification is feasible. The 235 kbps data rate also falls slightly below the 250 kbps specification.

Q: What does MSL 3 mean compared to MSL 1?

A: MSL 3 components require controlled moisture exposure limited to 168 hours at specified humidity levels before soldering. MSL 1 components have unlimited shelf life without moisture control. This affects storage, handling, and assembly procedures.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance, matching the original TRS3232IDR specification.

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