TRS3232IDWR RS232 Transceiver Equivalent & Substitute Parts

Part Overview

The TRS3232IDWR 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 250kbps data rate and 300mV receiver hysteresis, suitable for legacy serial communication applications requiring full RS232 protocol compliance.

Key Parameters

Parameter	Value
Manufacturer Part Number	TRS3232IDWR
Manufacturer	Texas Instruments
Category	Interface
Type	Transceiver
Protocol	RS232
Number of Drivers/Receivers	2/2
Duplex	Full
Receiver Hysteresis	300 mV
Data Rate	250kbps
Voltage - Supply	3V ~ 5.5V
Operating Temperature	-40°C ~ 85°C
Mounting Type	Surface Mount
Package / Case	16-SOIC (0.295", 7.50mm Width)
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the TRS3232IDWR is determined by strict adherence to the following electrical and mechanical parameters:

Critical Matching Parameters:

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

Allowable Variation Parameters:

Receiver Hysteresis: 300mV or 500mV (both acceptable for RS232 full-duplex operation)
Data Rate: 235kbps, 250kbps, or 1Mbps (all support minimum 250kbps requirement)
Operating Temperature: -40°C ~ 85°C or 0°C ~ 70°C (both ranges acceptable depending on application)
Moisture Sensitivity Level: 1 (Unlimited) or 3 (168 Hours) (both acceptable for standard handling)

Substitute parts are grouped by product status (Active vs. Obsolete) and packaging format (Tube, Cut Tape & Digi-Reel, Tape & Reel) to facilitate procurement flexibility.

Parameter Comparison

Part Number	Manufacturer	Product Status	Protocol	Drivers/Receivers	Receiver Hysteresis	Data Rate	Supply Voltage	Operating Temp	Package	Packaging Format
TRS3232IDWR	Texas Instruments	Obsolete	RS232	2/2	300 mV	250kbps	3V ~ 5.5V	-40°C ~ 85°C	16-SOIC	Standard
MAX3232EIDWR	Texas Instruments	Active	RS232	2/2	300 mV	250kbps	3V ~ 5.5V	-40°C ~ 85°C	16-SOIC	Cut Tape & Digi-Reel
MAX3232IDWR	Texas Instruments	Active	RS232	2/2	300 mV	250kbps	3V ~ 5.5V	-40°C ~ 85°C	16-SOIC	Cut Tape & Digi-Reel
MAX3232EEWE+	Analog Devices Inc./Maxim Integrated	Active	RS232	2/2	500 mV	250kbps	3V ~ 5.5V	-40°C ~ 85°C	16-SOIC	Tube
MAX3232EEWE+T	Analog Devices Inc./Maxim Integrated	Active	RS232	2/2	500 mV	250kbps	3V ~ 5.5V	-40°C ~ 85°C	16-SOIC	Cut Tape & Digi-Reel
ICL3232ECBZ	Renesas Electronics Corporation	Active	RS232	2/2	500 mV	250kbps	3V ~ 5.5V	0°C ~ 70°C	16-SOIC	Tube
ICL3232ECBZ-T	Renesas Electronics Corporation	Active	RS232	2/2	500 mV	250kbps	3V ~ 5.5V	0°C ~ 70°C	16-SOIC	Tape & Reel
MAX3232CWE+	Analog Devices Inc./Maxim Integrated	Active	RS232	2/2	300 mV	235Kbps	3V ~ 5.5V	0°C ~ 70°C	16-SOIC	Tube
MAX3232CWE+T	Analog Devices Inc./Maxim Integrated	Active	RS232	2/2	300 mV	235Kbps	3V ~ 5.5V	0°C ~ 70°C	16-SOIC	Cut Tape & Digi-Reel
MAX3232ECWE+	Analog Devices Inc./Maxim Integrated	Active	RS232	2/2	500 mV	1Mbps	3V ~ 5.5V	0°C ~ 70°C	16-SOIC	Tube
MAX3232ECWE+T	Analog Devices Inc./Maxim Integrated	Active	RS232	2/2	500 mV	1Mbps	3V ~ 5.5V	0°C ~ 70°C	16-SOIC	Cut Tape & Digi-Reel

Engineering Selection Recommendations

Primary Substitutes (Highest Compatibility):

MAX3232EIDWR and MAX3232IDWR are parametric equivalents manufactured by Texas Instruments with identical electrical specifications to the TRS3232IDWR. Both are active products with ROHS3 compliance and MSL 1 rating. These parts maintain the original -40°C ~ 85°C operating temperature range and 300mV receiver hysteresis. Selection between these two depends on packaging format availability: Cut Tape & Digi-Reel format for automated assembly or standard format for manual handling.

Secondary Substitutes (Extended Temperature Range):

MAX3232EEWE+ and MAX3232EEWE+T maintain the -40°C ~ 85°C operating temperature range with 500mV receiver hysteresis and 250kbps data rate. These Analog Devices/Maxim parts are active products with ROHS3 compliance. The increased receiver hysteresis provides enhanced noise immunity in electrically noisy environments. Packaging format selection: Tube for manual assembly or Cut Tape & Digi-Reel for automated processes.

Alternative Substitutes (Commercial Temperature Range):

ICL3232ECBZ and ICL3232ECBZ-T (Renesas Electronics) operate within 0°C ~ 70°C commercial temperature range with 500mV receiver hysteresis. These are suitable for applications not requiring extended low-temperature operation. MSL 3 rating requires controlled storage conditions (168 hours at 60% relative humidity, 30°C). Packaging: Tube or Tape & Reel format.

MAX3232CWE+ and MAX3232CWE+T (Analog Devices/Maxim) operate within 0°C ~ 70°C commercial temperature range with 300mV receiver hysteresis and 235kbps data rate. These are suitable for standard industrial applications. ROHS3 compliant with MSL 1 rating.

Enhanced Performance Substitutes:

MAX3232ECWE+ and MAX3232ECWE+T support 1Mbps data rate with 500mV receiver hysteresis and 0°C ~ 70°C operating temperature. These are suitable for applications requiring higher data throughput while maintaining full RS232 protocol compliance.

Frequently Asked Questions (FAQ)

Q: Can MAX3232EIDWR directly replace TRS3232IDWR in production?

A: Yes. MAX3232EIDWR is a parametric equivalent with identical electrical specifications (2/2 RS232 transceiver, 250kbps, 300mV hysteresis, 3V-5.5V supply, -40°C to 85°C operating range) and identical 16-SOIC package. Both are ROHS3 compliant with MSL 1 rating. The primary difference is product status (Active vs. Obsolete) and packaging format (Cut Tape & Digi-Reel vs. standard).

Q: What is the difference between 300mV and 500mV receiver hysteresis?

A: Receiver hysteresis defines the voltage difference between logic high and low thresholds. 500mV hysteresis provides greater noise immunity in electrically noisy environments but may introduce slight timing delays. 300mV hysteresis offers faster response with lower noise immunity. Both values are acceptable for RS232 full-duplex operation and are interchangeable based on application requirements.

Q: Are parts with 0°C ~ 70°C operating temperature suitable for -40°C applications?

A: No. Parts specified for 0°C ~ 70°C commercial temperature range are not rated for operation below 0°C. For applications requiring -40°C ~ 85°C operation, select only parts with extended temperature specifications: TRS3232IDWR, MAX3232EIDWR, MAX3232IDWR, MAX3232EEWE+, or MAX3232EEWE+T.

Q: What packaging formats are available?

A: Tube packaging is suitable for manual assembly and small-volume production. Cut Tape & Digi-Reel format is optimized for automated pick-and-place assembly. Tape & Reel format is standard for high-volume automated manufacturing. All formats contain identical components; selection depends on assembly process requirements.

Q: Does higher data rate (1Mbps vs. 250kbps) affect compatibility?

A: No. Parts rated for 1Mbps data rate (MAX3232ECWE+, MAX3232ECWE+T) are backward compatible with applications requiring 250kbps or lower. The higher rating indicates enhanced performance capability without affecting operation at lower speeds. These parts are suitable substitutes for 250kbps applications.

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

A: Moisture Sensitivity Level (MSL) indicates maximum storage time at specified humidity before component reflow. MSL 1 (Unlimited) allows indefinite storage under standard conditions. MSL 3 (168 Hours) requires controlled storage at ≤60% relative humidity, 30°C maximum. For standard procurement and storage, MSL 1 parts are preferred. MSL 3 parts require special handling procedures.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for electronic components.

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