TRS3237ECDBR Equivalent & Substitute Parts

Part Overview

The TRS3237ECDBR is an active RS232 interface transceiver manufactured by Texas Instruments, configured as a 5/3 full-duplex transceiver in a 28-SSOP surface mount package. This device operates across a 3V to 5.5V supply range with a 1Mbps data rate and is designed for serial communication applications requiring RS232 protocol compliance. The part is currently in active production status with ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1).

Equivalent and substitute parts are necessary when addressing supply chain constraints, packaging requirements, temperature range specifications, or inventory availability while maintaining functional compatibility within RS232 transceiver applications.

Key Parameters

Parameter	TRS3237ECDBR
Manufacturer	Texas Instruments
Type	Transceiver
Protocol	RS232
Drivers/Receivers	5/3
Duplex	Full
Data Rate	1Mbps
Voltage Supply	3V ~ 5.5V
Operating Temperature	0°C ~ 70°C
Package	28-SSOP (0.209", 5.30mm Width)
Mounting Type	Surface Mount
Receiver Hysteresis	500 mV
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the TRS3237ECDBR is determined by the following critical parameters:

Core Compatibility Requirements:

Protocol: RS232
Configuration: 5/3 Full-Duplex Transceiver
Package: 28-SSOP (0.209", 5.30mm Width)
Mounting Type: Surface Mount
Voltage Supply Range: 3V ~ 5.5V
RoHS Status: ROHS3 Compliant

Performance Parameters Affecting Substitution:

Data Rate: 1Mbps (primary specification)
Receiver Hysteresis: 500 mV (primary specification)
Operating Temperature Range: 0°C ~ 70°C (standard industrial range)

Substitute parts are grouped into three categories based on parameter alignment:

Direct Substitutes (Identical Core Parameters): Parts matching all core compatibility requirements and primary performance specifications (1Mbps data rate, 500 mV hysteresis, 0°C ~ 70°C operating range).

Functional Equivalents (Reduced Performance): Parts with identical core compatibility but reduced data rate (250kbps) or modified receiver hysteresis (300 mV). These are suitable for applications not requiring maximum data rate performance.

Extended Temperature Variants: Parts with identical core parameters but extended operating temperature range (-40°C ~ 85°C), suitable for industrial or automotive applications requiring wider temperature operation.

Parameter Comparison

Part Number	Manufacturer	Data Rate	Receiver Hysteresis	Operating Temperature	Packaging	MSL Rating	Inventory (Pcs)
TRS3237ECDBR	Texas Instruments	1Mbps	500 mV	0°C ~ 70°C	Tape & Reel (TR)	1 (Unlimited)	2995
ICL3237ECAZ-T	Renesas Electronics	1Mbps	500 mV	0°C ~ 70°C	Tape & Reel (TR)	3 (168 Hours)	2600
ICL3237ECAZ	Renesas Electronics	1Mbps	500 mV	0°C ~ 70°C	Tube	3 (168 Hours)	4074
ST3237EBPR	STMicroelectronics	1Mbps	300 mV	-40°C ~ 85°C	Cut Tape (CT) & Digi-Reel®	3 (168 Hours)	63450
ICL3237EIAZ-T	Renesas Electronics	1Mbps	500 mV	-40°C ~ 85°C	Cut Tape (CT) & Digi-Reel®	3 (168 Hours)	1486
MAX3237ECAI+	Analog Devices Inc./Maxim Integrated	250kbps	500 mV	0°C ~ 70°C	Tube	1 (Unlimited)	2200
MAX3237ECAI+T	Analog Devices Inc./Maxim Integrated	250kbps	500 mV	0°C ~ 70°C	Cut Tape (CT) & Digi-Reel®	1 (Unlimited)	2605
MAX3237EEAI+	Analog Devices Inc./Maxim Integrated	250kbps	500 mV	-40°C ~ 85°C	Tube	1 (Unlimited)	2156
MAX3237CAI+	Analog Devices Inc./Maxim Integrated	250kbps	300 mV	0°C ~ 70°C	Tube	1 (Unlimited)	1900
MAX3237EAI+	Analog Devices Inc./Maxim Integrated	250kbps	300 mV	-40°C ~ 85°C	Tube	1 (Unlimited)	2200
MAX3237EAI+T	Analog Devices Inc./Maxim Integrated	250kbps	300 mV	-40°C ~ 85°C	Cut Tape (CT) & Digi-Reel®	1 (Unlimited)	4260

Engineering Selection Recommendations

For Direct Substitution (1Mbps, 500 mV Hysteresis, 0°C ~ 70°C):

ICL3237ECAZ-T and ICL3237ECAZ from Renesas Electronics provide parametric equivalence to the TRS3237ECDBR. Both maintain identical data rate, receiver hysteresis, and operating temperature specifications. The ICL3237ECAZ-T variant in Tape & Reel packaging offers the closest form-factor match to the original part. Both devices carry ROHS3 compliance and REACH unaffected status. The higher inventory availability of ICL3237ECAZ (4074 units) supports supply chain flexibility.

For Extended Temperature Operation (-40°C ~ 85°C):

ICL3237EIAZ-T from Renesas Electronics extends the operating temperature range while maintaining 1Mbps data rate and 500 mV receiver hysteresis. This variant is suitable for industrial applications requiring wider temperature operation. ST3237EBPR from STMicroelectronics also provides extended temperature range with 1Mbps performance, though with reduced receiver hysteresis (300 mV). ST3237EBPR offers significantly higher inventory (63450 units) and is available in Cut Tape packaging.

For Reduced Data Rate Applications (250kbps):

MAX3237 series devices from Analog Devices Inc./Maxim Integrated provide functional equivalence at reduced data rates. MAX3237ECAI+ and MAX3237ECAI+T maintain standard temperature range (0°C ~ 70°C) with 500 mV receiver hysteresis. MAX3237EEAI+ extends temperature range to -40°C ~ 85°C while maintaining 500 mV hysteresis. All MAX3237 variants carry MSL 1 (Unlimited) rating, providing superior moisture handling compared to Renesas alternatives.

All substitute parts maintain ROHS3 compliance and are in active production status.

Frequently Asked Questions (FAQ)

Q: Can I use a 250kbps data rate part as a substitute for the 1Mbps TRS3237ECDBR?

A: Functional substitution is possible only if your application does not require 1Mbps data rate performance. The MAX3237 series devices operate at 250kbps maximum. Verify your system's actual data rate requirements before selecting a reduced-performance substitute. All other electrical and mechanical parameters remain compatible.

Q: What is the difference between Tape & Reel, Cut Tape, and Tube packaging?

A: Tape & Reel (TR) packaging is optimized for high-volume automated assembly. Cut Tape (CT) & Digi-Reel® provides flexibility for lower-volume or mixed-component orders. Tube packaging is used for manual assembly or lower-volume applications. All three packaging formats contain identical die and electrical performance; selection depends on assembly process requirements and order quantities.

Q: Are Renesas ICL3237 parts direct replacements for the Texas Instruments TRS3237ECDBR?

A: ICL3237ECAZ and ICL3237ECAZ-T are parametric equivalents matching the 1Mbps data rate, 500 mV receiver hysteresis, and 0°C ~ 70°C operating temperature of the TRS3237ECDBR. Both maintain identical package, voltage supply range, and RS232 protocol specifications. The primary difference is MSL rating: ICL3237 devices carry MSL 3 (168 Hours) versus MSL 1 (Unlimited) for the original part. This affects moisture exposure handling during storage and assembly.

Q: Why do some substitutes have different receiver hysteresis values?

A: Receiver hysteresis affects input threshold sensitivity. The TRS3237ECDBR specifies 500 mV hysteresis. Some alternatives (MAX3237CAI+, MAX3237EAI+, MAX3237EAI+T, ST3237EBPR) provide 300 mV hysteresis, which increases input sensitivity. This parameter difference may affect noise immunity in specific applications. Select parts matching the original 500 mV specification unless your application specifically benefits from increased sensitivity.

Q: Which substitute offers the best inventory availability?

A: ST3237EBPR from STMicroelectronics provides the highest inventory level at 63,450 units. This part maintains 1Mbps data rate performance with extended temperature range (-40°C ~ 85°C), though with 300 mV receiver hysteresis instead of 500 mV. For standard temperature range applications, ICL3237ECAZ offers 4,074 units with matching hysteresis specifications.

Q: Can I substitute parts with different operating temperature ranges?

A: Temperature range substitution is application-dependent. If your system operates within 0°C ~ 70°C, parts rated for -40°C ~ 85°C are fully compatible and provide additional margin. Conversely, using a standard-temperature part (0°C ~ 70°C) in an extended-temperature application (-40°C ~ 85°C) is not recommended. Verify your actual operating environment before selecting temperature-rated variants.

Q: What does MSL rating mean for component selection?

A: Moisture Sensitivity Level (MSL) indicates how long a component can be exposed to ambient moisture before assembly. MSL 1 (Unlimited) allows indefinite storage without moisture control. MSL 3 (168 Hours) requires moisture control and limits exposure to 168 hours after package opening. For applications with extended lead times or storage periods, MSL 1 rated parts (TRS3237ECDBR, MAX3237 series) provide operational flexibility.

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