TRSF3243IDW Equivalent & Substitute Parts

Part Overview

The TRSF3243IDW is a full-duplex RS232 transceiver IC manufactured by Texas Instruments, featuring 3 drivers and 5 receivers in a 28-SOIC surface mount package. This device operates across a 3V to 5.5V supply range and supports data rates up to 1 Mbps with 500 mV receiver hysteresis. The part is currently classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. Substitute parts maintain the same functional specifications, package form factor, and electrical performance characteristics required for RS232 communication interfaces.

Substiute Parts

TRSF3243IDW

Texas InstrumentsIn Stock: 925TRSF3243IDW Datasheet

Current PartRFQ

MAX3243EIDWR

Texas InstrumentsIn Stock: 6080MAX3243EIDWR Datasheet

DirectRFQ

SN65C3243DW

Texas InstrumentsIn Stock: 12829SN65C3243DW Datasheet

Parametric EquivalentRFQ

MAX3243EEWI+

Analog Devices Inc./Maxim IntegratedIn Stock: 867MAX3243EEWI+ Datasheet

DirectRFQ

MAX3243EEWI+T

Analog Devices Inc./Maxim IntegratedIn Stock: 2135MAX3243EEWI+T Datasheet

DirectRFQ

MAX3244EEWI+

Analog Devices Inc./Maxim IntegratedIn Stock: 1983MAX3244EEWI+ Datasheet

DirectRFQ

MAX3244EEWI+T

Analog Devices Inc./Maxim IntegratedIn Stock: 1062MAX3244EEWI+T Datasheet

DirectRFQ

MAX3245EEWI+T

Analog Devices Inc./Maxim IntegratedIn Stock: 853MAX3245EEWI+T Datasheet

DirectRFQ

MAX3241EWI+

Analog Devices Inc./Maxim IntegratedIn Stock: 1018MAX3241EWI+ Datasheet

Parametric EquivalentRFQ

MAX3245EEWI+

Analog Devices Inc./Maxim IntegratedIn Stock: 1075MAX3245EEWI+ Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the TRSF3243IDW are grouped based on strict electrical and mechanical compatibility criteria. All substitute parts maintain the following core parameters:

• Protocol: RS232
• Number of Drivers/Receivers: 3/5
• Duplex: Full
• Receiver Hysteresis: 500 mV
• Voltage Supply Range: 3V to 5.5V
• Operating Temperature Range: -40°C to 85°C
• Package / Case: 28-SOIC (0.295", 7.50mm Width)
• Mounting Type: Surface Mount
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

Substitutes are categorized into two groups:

Direct Substitutes maintain all electrical parameters including the 1 Mbps data rate specification of the original part. These parts are functionally identical and provide drop-in replacement capability.

Parametric Equivalents maintain all core parameters but may differ in data rate specifications. These parts are electrically compatible and functionally equivalent for RS232 communication applications, though data rate performance characteristics may vary.

Parameter Comparison

Engineering Selection Recommendations

For applications requiring direct functional equivalence with the TRSF3243IDW, select from parts with matching 1 Mbps data rate specifications: SN65C3243DW, MAX3245EEWI+T, MAX3241EWI+, or MAX3245EEWI+. These parts maintain identical electrical performance characteristics and are suitable for drop-in replacement scenarios.

For new designs or applications where lower data rate performance is acceptable, MAX3243EIDWR, MAX3243EEWI+, MAX3243EEWI+T, MAX3244EEWI+, and MAX3244EEWI+T provide active product status with full ROHS3 compliance and unlimited moisture sensitivity rating.

All substitute parts carry ROHS3 compliance and REACH unaffected status, meeting current environmental and regulatory requirements. Parts with active product status (Analog Devices Inc./Maxim Integrated MAX series and Texas Instruments MAX3243EIDWR) offer superior long-term availability and supply chain continuity compared to the obsolete TRSF3243IDW or last-time-buy SN65C3243DW.

Frequently Asked Questions (FAQ)

Q: Can MAX3243EEWI+ replace TRSF3243IDW directly?

A: MAX3243EEWI+ is electrically compatible and maintains all core RS232 transceiver specifications including 3/5 driver/receiver configuration, full-duplex operation, and 28-SOIC package. However, it operates at 250 kbps data rate compared to the original 1 Mbps specification. For applications requiring 1 Mbps performance, use MAX3245EEWI+T or MAX3245EEWI+ instead.

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

A: Tape & Reel (TR) packaging is optimized for automated assembly processes and high-volume production. Tube packaging is suitable for manual assembly or lower-volume applications. Both packaging types contain identical die and electrical specifications. Selection depends on manufacturing process requirements rather than functional performance.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 compliance certification and REACH unaffected status, meeting current environmental regulations for electronic component manufacturing and use.

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

A: Parts with active product status from Analog Devices Inc./Maxim Integrated (MAX3243EEWI+, MAX3243EEWI+T, MAX3244EEWI+, MAX3244EEWI+T, MAX3245EEWI+T, MAX3241EWI+, MAX3245EEWI+) provide superior long-term supply chain continuity. The SN65C3243DW carries last-time-buy status, indicating limited future availability.

Q: Can I use a lower data rate substitute in a 1 Mbps application?

A: No. Data rate specifications define maximum communication speed. Using a 250 kbps or 500 kbps part in an application designed for 1 Mbps operation will result in communication failures or reduced system performance. Match data rate specifications to application requirements.

Q: Are there any differences in receiver hysteresis among substitute parts?

A: No. All substitute parts maintain 500 mV receiver hysteresis, matching the original TRSF3243IDW specification. This parameter is consistent across all listed alternatives.