TRSF3232IPWG4 RS232 Transceiver Equivalent & Substitute Parts

Part Overview

The TRSF3232IPWG4 is a 2/2 full-duplex RS232 transceiver manufactured by Texas Instruments in a 16-TSSOP 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 1Mbps data rate and 300mV receiver hysteresis, suitable for legacy serial communication applications requiring full RS232 protocol compliance.

Key Parameters

Parameter	Value
Manufacturer Part Number	TRSF3232IPWG4
Manufacturer	Texas Instruments
Type	Transceiver
Protocol	RS232
Number of Drivers/Receivers	2/2
Duplex	Full
Data Rate	1Mbps
Receiver Hysteresis	300 mV
Voltage - Supply	3V ~ 5.5V
Operating Temperature	-40°C ~ 85°C
Package / Case	16-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the TRSF3232IPWG4 is determined by the following critical parameters:

Primary Compatibility Criteria:

Protocol: RS232
Number of Drivers/Receivers: 2/2
Duplex: Full
Package / Case: 16-TSSOP (0.173", 4.40mm Width)
Voltage - Supply: 3V ~ 5.5V
Operating Temperature: -40°C ~ 85°C
Mounting Type: Surface Mount

Secondary Compatibility Parameters:

Data Rate: 1Mbps (minimum requirement)
Receiver Hysteresis: 300 mV (nominal)

Substitute parts are grouped into two categories:

Category 1 - Direct Equivalents (Full Parameter Match): Parts matching all primary criteria and secondary parameters, including 1Mbps data rate and 300mV receiver hysteresis. These provide pin-for-pin and functional equivalence.

Category 2 - Parametric Equivalents (Primary Criteria Match with Parameter Variations): Parts matching all primary criteria but with variations in data rate (250kbps) or receiver hysteresis (500mV). These remain functionally compatible for RS232 applications but operate within different electrical specifications.

Parameter Comparison

Part Number	Manufacturer	Product Status	Data Rate	Receiver Hysteresis	Packaging	Inventory
TRSF3232IPWG4	Texas Instruments	Obsolete	1Mbps	300 mV	16-TSSOP	802 Pcs
TRSF3232EIPWR	Texas Instruments	Active	1Mbps	300 mV	16-TSSOP	19200 Pcs
SN65C3232PW	Texas Instruments	Obsolete	1Mbps	300 mV	16-TSSOP	75450 Pcs
MAX3232EEUE+	Analog Devices Inc./Maxim Integrated	Active	250kbps	500 mV	16-TSSOP	2100 Pcs
MAX3232EEUE+T	Analog Devices Inc./Maxim Integrated	Active	250kbps	500 mV	16-TSSOP	30300 Pcs
SP3232EBEY-L/TR	MaxLinear, Inc.	Active	250kbps	300 mV	16-TSSOP	30194 Pcs
SP3232EUEY-L/TR	MaxLinear, Inc.	Active	1Mbps	300 mV	16-TSSOP	4778 Pcs
ST3232EBTR	STMicroelectronics	Active	250kbps	500 mV	16-TSSOP	129821 Pcs

Engineering Selection Recommendations

Recommended Primary Substitutes (Active Status, Full Parameter Match):

TRSF3232EIPWR (Texas Instruments) is the preferred direct replacement. It maintains identical electrical specifications (1Mbps data rate, 300mV receiver hysteresis) and package configuration while offering active product status and significantly higher inventory availability (19200 units).

SP3232EUEY-L/TR (MaxLinear, Inc.) provides an alternative direct equivalent with matching data rate and receiver hysteresis specifications. Active product status and moderate inventory (4778 units) support production continuity.

Secondary Substitutes (Active Status, Parameter Variations):

MAX3232EEUE+T (Analog Devices Inc./Maxim Integrated) and ST3232EBTR (STMicroelectronics) are functionally compatible alternatives with reduced data rate (250kbps) and increased receiver hysteresis (500mV). These parts remain suitable for RS232 applications where the lower data rate specification does not conflict with system requirements. Both maintain active product status and offer substantial inventory availability.

SP3232EBEY-L/TR (MaxLinear, Inc.) operates at 250kbps with 300mV receiver hysteresis, providing a compromise between full parameter matching and active product availability.

Obsolete Alternatives (Not Recommended for New Designs):

SN65C3232PW (Texas Instruments) matches all electrical parameters but retains obsolete status. Use only when existing inventory of TRSF3232IPWG4 is depleted and active substitutes are unavailable.

Frequently Asked Questions (FAQ)

Q: Can TRSF3232EIPWR directly replace TRSF3232IPWG4 without circuit modification?

A: Yes. TRSF3232EIPWR is a direct equivalent with identical electrical specifications (1Mbps data rate, 300mV receiver hysteresis), supply voltage range (3V–5.5V), operating temperature range (-40°C to 85°C), and 16-TSSOP package configuration. No circuit modifications are required.

Q: What is the difference between parts with 1Mbps and 250kbps data rates?

A: Data rate specification indicates the maximum serial communication speed the transceiver supports. Parts rated at 250kbps operate at lower maximum speeds than 1Mbps parts. Selection depends on the actual data rate requirements of the application. If the system operates below 250kbps, either specification is acceptable.

Q: Why do some substitutes have 500mV receiver hysteresis instead of 300mV?

A: Receiver hysteresis affects the voltage threshold at which the transceiver recognizes logic state transitions. Higher hysteresis (500mV) provides greater noise immunity but may require slightly higher signal levels for reliable detection. Lower hysteresis (300mV) offers faster response to marginal signals. Selection depends on signal integrity requirements in the specific application.

Q: Are all substitute parts ROHS3 compliant?

A: All listed substitute parts are ROHS3 compliant, matching the compliance status of the original TRSF3232IPWG4. Moisture Sensitivity Level (MSL) is 1 (Unlimited) for all parts, indicating no special moisture handling requirements.

Q: What packaging options are available for substitute parts?

A: Substitute parts are available in Cut Tape (CT) & Digi-Reel®, Tube, and Tape & Reel (TR) packaging formats. All maintain the 16-TSSOP physical package configuration. Packaging selection depends on production volume and assembly process requirements.

Q: Which substitute offers the best inventory availability?

A: ST3232EBTR (STMicroelectronics) offers the highest inventory availability at 129821 units. However, it operates at 250kbps with 500mV receiver hysteresis. For full parameter matching with high availability, MAX3232EEUE+T provides 30300 units, though with reduced data rate and increased hysteresis specifications.

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