TRSF3243IPW RS232 Transceiver Equivalent & Substitute Parts

Part Overview

The TRSF3243IPW is a full-duplex RS232 transceiver manufactured by Texas Instruments, featuring 3 drivers and 5 receivers in a 28-TSSOP surface mount package. This component operates across 3V to 5.5V supply voltage with a 1Mbps data rate and 500mV receiver hysteresis. The part is currently classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity.

Key Parameters

Parameter	Value
Manufacturer Part Number	TRSF3243IPW
Manufacturer	Texas Instruments
Product Category	Interface - RS232 Transceiver
Type	Transceiver
Protocol	RS232
Number of Drivers/Receivers	3/5
Duplex Mode	Full
Data Rate	1Mbps
Receiver Hysteresis	500 mV
Voltage Supply Range	3V ~ 5.5V
Operating Temperature	-40°C ~ 85°C
Package / Case	28-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the TRSF3243IPW is determined by strict alignment of the following critical parameters:

Primary Substitution Criteria:

Protocol: RS232
Number of Drivers/Receivers: 3/5
Duplex Mode: Full
Package / Case: 28-TSSOP (0.173", 4.40mm Width)
Voltage Supply Range: 3V ~ 5.5V
Operating Temperature: -40°C ~ 85°C
Mounting Type: Surface Mount

Secondary Compatibility Parameters:

Data Rate: 1Mbps (minimum requirement)
Receiver Hysteresis: 500mV (preferred for signal integrity)
RoHS Compliance: ROHS3 Compliant
Moisture Sensitivity Level: 1 (Unlimited)

Parts are grouped into two categories:

Direct Equivalents (Identical Specifications): Parts matching all primary criteria and secondary parameters without deviation.

Parametric Equivalents (Functional Compatibility): Parts matching all primary criteria with variations in data rate or receiver hysteresis that remain functionally compatible within the 3/5 transceiver architecture.

Parameter Comparison

Part Number	Manufacturer	Data Rate	Receiver Hysteresis	Voltage Supply	Operating Temp	Package	Product Status	RoHS Status
TRSF3243IPW	Texas Instruments	1Mbps	500 mV	3V ~ 5.5V	-40°C ~ 85°C	28-TSSOP	Obsolete	ROHS3
TRSF3243IPWR	Texas Instruments	1Mbps	500 mV	3V ~ 5.5V	-40°C ~ 85°C	28-TSSOP	Active	ROHS3
SN65C3243PW	Texas Instruments	1Mbps	500 mV	3V ~ 5.5V	-40°C ~ 85°C	28-TSSOP	Obsolete	ROHS3
MAX3243EEUI+	Analog Devices Inc./Maxim Integrated	120Kbps	300 mV	3V ~ 5.5V	-40°C ~ 85°C	28-TSSOP	Active	ROHS3
MAX3243EEUI+T	Analog Devices Inc./Maxim Integrated	120Kbps	300 mV	3V ~ 5.5V	-40°C ~ 85°C	28-TSSOP	Active	ROHS3
MAX3244EEUI+	Analog Devices Inc./Maxim Integrated	250kbps	500 mV	3V ~ 5.5V	-40°C ~ 85°C	28-TSSOP	Active	ROHS3
MAX3245EEUI+T	Analog Devices Inc./Maxim Integrated	1Mbps	500 mV	3V ~ 5.5V	-40°C ~ 85°C	28-TSSOP	Active	ROHS3
MAX3245EEUI+	Analog Devices Inc./Maxim Integrated	1Mbps	500 mV	3V ~ 5.5V	-40°C ~ 85°C	28-TSSOP	Active	ROHS3
SP3243EUEY-L/TR	MaxLinear, Inc.	1Mbps	300 mV	3V ~ 5.5V	-40°C ~ 85°C	28-TSSOP	Active	RoHS
SP3243EBEY-L/TR	MaxLinear, Inc.	250kbps	300 mV	3V ~ 5.5V	-40°C ~ 85°C	28-TSSOP	Active	RoHS

Engineering Selection Recommendations

Recommended Primary Substitute: TRSF3243IPWR

TRSF3243IPWR is the direct active equivalent manufactured by Texas Instruments. It maintains identical electrical specifications to the TRSF3243IPW including 1Mbps data rate and 500mV receiver hysteresis. This part carries ROHS3 compliance and is currently in active production status, ensuring long-term availability and supply chain continuity.

Recommended Secondary Substitutes: MAX3245EEUI+T and MAX3245EEUI+

Both MAX3245 variants from Analog Devices Inc./Maxim Integrated provide full parametric equivalence with 1Mbps data rate and 500mV receiver hysteresis. Both are in active production with ROHS3 compliance. MAX3245EEUI+T is available in standard packaging, while MAX3245EEUI+ is supplied in tube packaging.

Alternative Substitutes with Functional Compatibility:

MAX3244EEUI+ operates at 250kbps with 500mV receiver hysteresis and maintains active production status. This part is suitable for applications where data rate requirements do not exceed 250kbps.

SP3243EUEY-L/TR from MaxLinear, Inc. operates at 1Mbps but features 300mV receiver hysteresis. This part is in active production and available in tape and reel packaging.

Parts Not Recommended for New Designs:

SN65C3243PW and MAX3243EEUI+/MAX3243EEUI+T are not recommended as primary substitutes. SN65C3243PW is obsolete. MAX3243 variants operate at reduced data rates (120Kbps) and lower receiver hysteresis (300mV), limiting their suitability for applications requiring full 1Mbps performance.

Frequently Asked Questions (FAQ)

Q: Can TRSF3243IPWR directly replace TRSF3243IPW without circuit modification?

A: Yes. TRSF3243IPWR is the direct active equivalent with identical electrical specifications, package, and pinout. No circuit modifications are required.

Q: What is the primary difference between TRSF3243IPW and MAX3245EEUI+T?

A: Both parts are functionally equivalent with identical data rate (1Mbps) and receiver hysteresis (500mV). The primary difference is manufacturer: TRSF3243IPW is Texas Instruments while MAX3245EEUI+T is Analog Devices Inc./Maxim Integrated. MAX3245EEUI+T is in active production, whereas TRSF3243IPW is obsolete.

Q: Are MAX3243EEUI+ and MAX3243EEUI+T suitable substitutes?

A: MAX3243 variants operate at 120Kbps data rate and 300mV receiver hysteresis, both reduced from the TRSF3243IPW specification of 1Mbps and 500mV. These parts are functionally compatible only for applications with lower bandwidth requirements. For full 1Mbps performance, MAX3245 variants are recommended.

Q: What packaging options are available for substitute parts?

A: Substitute parts are available in multiple packaging formats: Cut Tape (CT) & Digi-Reel® (TRSF3243IPWR, SP3243EUEY-L/TR), Tube (SN65C3243PW, MAX3243EEUI+, MAX3244EEUI+, MAX3245EEUI+), and Tape & Reel (TR) (SP3243EBEY-L/TR). All maintain the 28-TSSOP surface mount package specification.

Q: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts listed are RoHS compliant. TRSF3243IPWR, SN65C3243PW, and all MAX3245/MAX3244/MAX3243 variants carry ROHS3 compliance. SP3243 variants from MaxLinear carry RoHS compliance.

Q: What is the moisture sensitivity level for these parts?

A: All listed parts carry Moisture Sensitivity Level 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling.

Q: Can SP3243EUEY-L/TR replace TRSF3243IPW in high-speed applications?

A: SP3243EUEY-L/TR operates at 1Mbps matching the TRSF3243IPW data rate. However, it features 300mV receiver hysteresis compared to the TRSF3243IPW specification of 500mV. This reduced hysteresis may affect signal integrity in noisy environments. Evaluation is required for applications with marginal signal quality.

Q: What is the difference between TRSF3243IPWR and SN65C3243PW?

A: Both parts are Texas Instruments products with identical electrical specifications (1Mbps, 500mV hysteresis). TRSF3243IPWR is in active production status, while SN65C3243PW is obsolete. TRSF3243IPWR is the recommended choice for new designs and ongoing production.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message