TRS3238CDB RS232 Transceiver Equivalent & Substitute Parts

Part Overview

The TRS3238CDB is a full-duplex RS232 transceiver manufactured by Texas Instruments, featuring 5 drivers and 3 receivers in a 28-SSOP surface mount package. This device is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. The TRS3238CDB operates across 3V to 5.5V supply voltage with a 250 kbps data rate and 300 mV receiver hysteresis, suitable for legacy serial communication applications requiring full RS232 protocol compliance.

Key Parameters

Parameter	Value
Manufacturer Part Number	TRS3238CDB
Manufacturer	Texas Instruments
Product Category	Interface - RS232 Transceiver
Type	Transceiver
Protocol	RS232
Drivers/Receivers Configuration	5/3 (5 Drivers, 3 Receivers)
Duplex Mode	Full
Package / Case	28-SSOP (0.209", 5.30mm Width)
Mounting Type	Surface Mount
Voltage Supply Range	3V ~ 5.5V
Data Rate	250 kbps
Receiver Hysteresis	300 mV
Operating Temperature	0°C ~ 70°C
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the TRS3238CDB is determined by strict adherence to the following electrical and mechanical parameters:

Critical Matching Parameters:

Protocol: RS232
Drivers/Receivers Configuration: 5/3
Duplex Mode: Full
Package / Case: 28-SSOP (0.209", 5.30mm Width)
Mounting Type: Surface Mount
Voltage Supply Range: 3V ~ 5.5V
Receiver Hysteresis: 300 mV (primary specification)
Data Rate: 250 kbps (minimum requirement)

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

MFR Recommended Substitutes: Parts that match all critical parameters and are actively produced by manufacturers, offering direct functional replacement with improved product status.

Upgrade Options: Parts that exceed the original specifications in operating temperature range or receiver hysteresis while maintaining all critical electrical and mechanical parameters.

Parametric Equivalents: Parts that match all critical parameters but may differ in secondary specifications such as packaging format or manufacturer, providing alternative sourcing options.

Parameter Comparison

Part Number	Manufacturer	Status	Drivers/Receivers	Package	Voltage Supply	Data Rate	Receiver Hysteresis	Operating Temp	RoHS
TRS3238CDB	Texas Instruments	Obsolete	5/3	28-SSOP	3V ~ 5.5V	250 kbps	300 mV	0°C ~ 70°C	ROHS3
MAX3238ECDBR	Texas Instruments	Active	5/3	28-SSOP	3V ~ 5.5V	400 kbps	300 mV	0°C ~ 70°C	ROHS3
MAX3248EEAI+	Analog Devices Inc./Maxim Integrated	Active	5/3	28-SSOP	3V ~ 5.5V	250 kbps	600 mV	-40°C ~ 85°C	ROHS3
MAX3238CAI+	Analog Devices Inc./Maxim Integrated	Active	5/3	28-SSOP	3V ~ 5.5V	250 kbps	500 mV	0°C ~ 70°C	ROHS3
MAX3238CAI+T	Analog Devices Inc./Maxim Integrated	Active	5/3	28-SSOP	3V ~ 5.5V	250 kbps	500 mV	0°C ~ 70°C	ROHS3
MAX3238EAI+	Analog Devices Inc./Maxim Integrated	Active	5/3	28-SSOP	3V ~ 5.5V	250 kbps	300 mV	-40°C ~ 85°C	ROHS3
MAX3238EAI+T	Analog Devices Inc./Maxim Integrated	Active	5/3	28-SSOP	3V ~ 5.5V	250 kbps	300 mV	-40°C ~ 85°C	ROHS3
SP3238ECA-L/TR	MaxLinear, Inc.	Active	5/3	28-SSOP	3V ~ 5.5V	250 kbps	500 mV	0°C ~ 70°C	RoHS Compliant
SP3238EEA-L/TR	MaxLinear, Inc.	Active	5/3	28-SSOP	3V ~ 5.5V	250 kbps	500 mV	-40°C ~ 85°C	ROHS3
MAX3237CAI+	Analog Devices Inc./Maxim Integrated	Active	5/3	28-SSOP	3V ~ 5.5V	250 kbps	300 mV	0°C ~ 70°C	ROHS3
MAX3238CDB	Texas Instruments	Obsolete	5/3	28-SSOP	3V ~ 5.5V	250 kbps	300 mV	0°C ~ 70°C	ROHS3

Engineering Selection Recommendations

For Direct Replacement (Active Product Status): MAX3238EAI+ and MAX3238EAI+T are the primary recommended substitutes. Both parts match the TRS3238CDB across all critical electrical parameters (5/3 configuration, 300 mV receiver hysteresis, 250 kbps data rate, 3V–5.5V supply) and package specifications. These parts are manufactured by Analog Devices Inc./Maxim Integrated with active product status and ROHS3 compliance. The extended operating temperature range (-40°C to 85°C) provides improved reliability for industrial applications.

For Enhanced Operating Temperature Range: SP3238EEA-L/TR offers the same electrical specifications as the original part with extended temperature operation (-40°C to 85°C) and active product status. This part is manufactured by MaxLinear, Inc., with ROHS3 compliance and superior inventory availability (20,890 units).

For Improved Data Rate Performance: MAX3238ECDBR maintains the original 300 mV receiver hysteresis and operating temperature range while providing increased data rate capability (400 kbps versus 250 kbps). This part is manufactured by Texas Instruments with active product status and ROHS3 compliance.

For Extended Temperature and Hysteresis Margin: MAX3248EEAI+ provides the widest operating temperature range (-40°C to 85°C) with increased receiver hysteresis (600 mV), offering enhanced noise immunity. This upgrade maintains all other critical parameters and is ROHS3 compliant.

All recommended substitutes maintain full electrical and mechanical compatibility with the TRS3238CDB within the specified parameter tolerances.

Frequently Asked Questions (FAQ)

Q: Can MAX3238CAI+ be used as a direct replacement for TRS3238CDB? A: MAX3238CAI+ matches the TRS3238CDB in all critical parameters (5/3 configuration, 28-SSOP package, 3V–5.5V supply, 250 kbps data rate) and is ROHS3 compliant with active product status. The receiver hysteresis differs (500 mV versus 300 mV), which represents a higher noise immunity threshold. This part is functionally compatible for applications where the increased hysteresis margin does not conflict with signal integrity requirements.

Q: What is the difference between MAX3238EAI+ and MAX3238EAI+T? A: Both parts are electrically identical with matching specifications (300 mV receiver hysteresis, 250 kbps data rate, -40°C to 85°C operating range). The primary difference is packaging format: MAX3238EAI+ is supplied in tube packaging, while MAX3238EAI+T is supplied in tape and reel format. Selection depends on production volume and assembly line requirements.

Q: Why does SP3238EEA-L/TR have higher inventory availability? A: SP3238EEA-L/TR is manufactured by MaxLinear, Inc., and maintains active product status with 20,890 units in stock. This part meets all critical electrical and mechanical specifications of the TRS3238CDB and offers superior supply chain availability for high-volume production requirements.

Q: Is the 28-SSOP package compatible across all substitute parts? A: Yes. All substitute parts listed use the identical 28-SSOP (0.209", 5.30mm Width) surface mount package. PCB layout and footprint compatibility is maintained across all recommended substitutes without design modification.

Q: Can MAX3248EEAI+ be used in applications requiring the original 300 mV receiver hysteresis specification? A: MAX3248EEAI+ provides 600 mV receiver hysteresis, which exceeds the original 300 mV specification. This higher hysteresis increases noise immunity but may affect sensitivity to low-amplitude signals. Use this part only when the application tolerates or benefits from increased hysteresis margin.

Q: Are all substitute parts ROHS3 compliant? A: All recommended substitutes are ROHS3 compliant except SP3238ECA-L/TR, which carries RoHS Compliant status without the ROHS3 designation. Verify compliance requirements for your specific application before selection.

Q: What is the significance of the obsolete product status for TRS3238CDB? A: Obsolete status indicates the part is no longer manufactured or supported by Texas Instruments. All recommended substitutes carry active product status, ensuring ongoing availability, technical support, and compliance with current manufacturing standards. Migration to an active substitute is necessary for long-term production continuity.

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