TRS3238IPW RS232 Transceiver Equivalent & Substitute Parts

Part Overview

The TRS3238IPW is a full-duplex RS232 transceiver manufactured by Texas Instruments, featuring 5 drivers and 3 receivers in a 28-TSSOP surface mount package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing system support and new design implementations. The part operates across a 3V to 5.5V supply range with a 250kbps data rate and is suitable for legacy communication interface applications requiring RS232 protocol compliance.

Key Parameters

Parameter	Value
Part Number	TRS3238IPW
Manufacturer	Texas Instruments
Type	Transceiver
Protocol	RS232
Drivers/Receivers	5/3
Duplex	Full
Data Rate	250kbps
Supply Voltage	3V ~ 5.5V
Operating Temperature	-40°C ~ 85°C
Package	28-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
Receiver Hysteresis	300 mV
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the TRS3238IPW is determined by the following critical parameters:

Protocol Compatibility: All substitutes must support RS232 full-duplex communication
Driver/Receiver Configuration: 5 drivers and 3 receivers required
Package Compatibility: 28-pin surface mount packages (TSSOP or SSOP variants)
Electrical Specifications: Supply voltage range 3V to 5.5V, operating temperature -40°C to 85°C
Data Rate: Minimum 250kbps capability
Compliance: RoHS3 compliance and MSL Level 1 rating

Substitute parts are grouped into two categories: direct parametric equivalents (matching all key specifications) and manufacturer-recommended alternatives (meeting functional requirements with minor parameter variations such as receiver hysteresis or data rate enhancements).

Parameter Comparison

Part Number	Manufacturer	Drivers/Receivers	Data Rate	Receiver Hysteresis	Package	Supply Voltage	Operating Temp	Product Status	RoHS Status
TRS3238IPW	Texas Instruments	5/3	250kbps	300 mV	28-TSSOP	3V ~ 5.5V	-40°C ~ 85°C	Obsolete	ROHS3
MAX3238IPW	Texas Instruments	5/3	250kbps	300 mV	28-TSSOP	3V ~ 5.5V	-40°C ~ 85°C	Obsolete	ROHS3
MAX3238EIPW	Texas Instruments	5/3	400kbps	300 mV	28-TSSOP	3V ~ 5.5V	-40°C ~ 85°C	Obsolete	ROHS3
MAX3248EEAI+	Analog Devices Inc./Maxim Integrated	5/3	250kbps	600 mV	28-SSOP	3V ~ 5.5V	-40°C ~ 85°C	Active	ROHS3
SP3238EEY-L	MaxLinear, Inc.	5/3	250kbps	500 mV	28-TSSOP	3V ~ 5.5V	-40°C ~ 85°C	Active	ROHS3
SP3238EEY-L/TR	MaxLinear, Inc.	5/3	250kbps	500 mV	28-TSSOP	3V ~ 5.5V	-40°C ~ 85°C	Active	RoHS

Engineering Selection Recommendations

Direct Parametric Equivalent: MAX3238IPW provides identical electrical and mechanical specifications to the TRS3238IPW, including matching receiver hysteresis of 300 mV and 250kbps data rate. Both parts are obsolete but maintain full compatibility for replacement applications.

Enhanced Data Rate Alternative: MAX3238EIPW offers increased data rate capability at 400kbps while maintaining all other critical parameters. This part is suitable for applications requiring higher throughput within the same form factor and supply voltage constraints.

Active Product Alternatives: SP3238EEY-L and SP3238EEY-L/TR are active products from MaxLinear, Inc., providing long-term availability and supply chain continuity. These parts maintain the 28-TSSOP package and 5/3 driver/receiver configuration with receiver hysteresis of 500 mV, which remains within acceptable RS232 specifications.

Package Variant Option: MAX3248EEAI+ is an active product offering 28-SSOP packaging (5.30mm width versus 4.40mm TSSOP width) with elevated receiver hysteresis of 600 mV. This part is suitable only for applications where PCB layout accommodates the wider SSOP package footprint.

All recommended substitutes maintain RoHS3 compliance and MSL Level 1 rating, ensuring compatibility with modern manufacturing and environmental standards.

Frequently Asked Questions (FAQ)

Q: Can MAX3238IPW directly replace TRS3238IPW in existing designs?

A: Yes. MAX3238IPW is a direct parametric equivalent with identical receiver hysteresis (300 mV), data rate (250kbps), package (28-TSSOP), and electrical specifications. No design modifications are required.

Q: What is the difference between MAX3238EIPW and MAX3238IPW?

A: MAX3238EIPW supports 400kbps data rate compared to 250kbps for MAX3238IPW. All other parameters, including receiver hysteresis, package, and supply voltage, are identical. Selection depends on application bandwidth requirements.

Q: Why is receiver hysteresis different across substitute parts?

A: Receiver hysteresis values (300 mV, 500 mV, 600 mV) represent design variations across manufacturers. All values specified are within RS232 standard compliance. Higher hysteresis provides improved noise immunity in electrically noisy environments.

Q: Are SP3238EEY-L and SP3238EEY-L/TR interchangeable?

A: Both parts are functionally equivalent with identical electrical specifications and 28-TSSOP packaging. SP3238EEY-L/TR is the tape-and-reel packaging variant of SP3238EEY-L, suitable for automated assembly processes.

Q: Can MAX3248EEAI+ be used as a drop-in replacement?

A: MAX3248EEAI+ requires PCB layout verification due to 28-SSOP packaging (5.30mm width) versus 28-TSSOP (4.40mm width). Footprint compatibility must be confirmed before implementation. Elevated receiver hysteresis (600 mV) is acceptable for RS232 applications.

Q: Which substitute part offers the best long-term availability?

A: SP3238EEY-L and SP3238EEY-L/TR are active products from MaxLinear, Inc., providing superior supply chain continuity compared to obsolete alternatives. MAX3248EEAI+ is also an active product from Analog Devices Inc./Maxim Integrated.

Q: Are all substitute parts RoHS compliant?

A: All listed substitutes maintain RoHS3 compliance except SP3238EEY-L/TR, which carries RoHS compliance designation. Both certifications are acceptable for modern manufacturing environments.

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