TRSF3243CDWRG4 RS232 Transceiver Equivalent & Substitute Parts

Part Overview

The TRSF3243CDWRG4 is a full-duplex RS232 transceiver interface IC manufactured by Texas Instruments, featuring 3 drivers and 5 receivers in a 28-SOIC 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 500mV receiver hysteresis, suitable for legacy RS232 communication applications.

Substiute Parts

TRSF3243CDWRG4

Texas InstrumentsIn Stock: 922TRSF3243CDWRG4 Datasheet

Current PartRFQ

MAX3243ECDWR

Texas InstrumentsIn Stock: 3793MAX3243ECDWR Datasheet

MFR RecommendedRFQ

MAX3243ECWI+

Analog Devices Inc./Maxim IntegratedIn Stock: 2403MAX3243ECWI+ Datasheet

DirectRFQ

MAX3244ECWI+

Analog Devices Inc./Maxim IntegratedIn Stock: 1101MAX3244ECWI+ Datasheet

DirectRFQ

MAX3245ECWI+

Analog Devices Inc./Maxim IntegratedIn Stock: 1080MAX3245ECWI+ Datasheet

DirectRFQ

MAX3245CWI+T

Analog Devices Inc./Maxim IntegratedIn Stock: 1170MAX3245CWI+T Datasheet

Parametric EquivalentRFQ

MAX3245ECWI+T

Analog Devices Inc./Maxim IntegratedIn Stock: 1204MAX3245ECWI+T Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TRSF3243CDWRG4 is determined by the following critical parameters:

• Package Compatibility: All substitutes must use the 28-SOIC (0.295", 7.50mm Width) surface mount package
• Functional Requirements: 3 drivers and 5 receivers, full-duplex RS232 protocol
• Electrical Specifications: 3V to 5.5V supply voltage range, 0°C to 70°C operating temperature
• Compliance: ROHS3 compliance and MSL 1 rating required
• Data Rate Capability: Minimum 1Mbps to match original specification
• Receiver Hysteresis: 500mV hysteresis for signal integrity

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

1. MFR Recommended Substitute: MAX3243ECDWR (Texas Instruments, active product status)
2. Direct Manufacturer Equivalents: MAX3243ECWI+, MAX3244ECWI+, MAX3245ECWI+ (Analog Devices Inc./Maxim Integrated)
3. Parametric Equivalents: MAX3245CWI+T, MAX3245ECWI+T (Analog Devices Inc./Maxim Integrated, packaging variants)

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: MAX3245ECWI+ or MAX3245ECWI+T

These parts provide full parameter alignment with the TRSF3243CDWRG4, including 1Mbps data rate capability and 500mV receiver hysteresis. Both are manufactured by Analog Devices Inc./Maxim Integrated with active product status, ensuring long-term availability and supply chain stability. The MAX3245ECWI+T variant offers tape and reel packaging for high-volume production environments.

Secondary Recommendation: MAX3243ECDWR

This Texas Instruments part maintains manufacturer continuity and active product status. It meets all functional and electrical requirements with the exception of data rate specification (500kbps versus 1Mbps). This part is suitable for applications where the 1Mbps capability is not required.

Alternative Consideration: MAX3244ECWI+

This part maintains 500mV receiver hysteresis and full electrical compatibility. The 250kbps data rate specification represents a reduction from the original 1Mbps capability and should be evaluated against application requirements.

Not Recommended for Direct Substitution: MAX3243ECWI+

While functionally compatible, this part specifies 300mV receiver hysteresis (versus 500mV) and 250kbps data rate. These parameter reductions may impact signal integrity in noise-sensitive applications.

All recommended substitutes maintain ROHS3 compliance, MSL 1 rating, and identical 28-SOIC packaging, ensuring PCB-level compatibility without design modification.

Frequently Asked Questions (FAQ)

Q: Can MAX3243ECDWR be used as a direct replacement for TRSF3243CDWRG4?

A: Yes, MAX3243ECDWR is electrically and mechanically compatible. Both parts feature 3 drivers, 5 receivers, 500mV hysteresis, and identical 28-SOIC packaging. The primary difference is data rate specification (500kbps versus 1Mbps). If your application operates below 500kbps, this part is suitable. For applications requiring 1Mbps capability, MAX3245ECWI+ is recommended.

Q: What is the difference between MAX3245ECWI+ and MAX3245ECWI+T?

A: Both parts are electrically identical with matching 1Mbps data rate and 500mV hysteresis. The difference is packaging format: MAX3245ECWI+ is supplied in tube packaging, while MAX3245ECWI+T is supplied in tape and reel format. Tape and reel packaging is standard for automated assembly and high-volume production.

Q: Are all substitute parts pin-compatible with the original TRSF3243CDWRG4?

A: All substitute parts use the 28-SOIC package with identical pin count and spacing. Pin-level compatibility must be verified against individual device datasheets, as pin assignments may vary between manufacturers despite functional equivalence.

Q: Do all substitute parts meet the same compliance requirements?

A: Yes, all listed substitute parts are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, matching the original part's compliance profile.

Q: Why is MAX3243ECWI+ listed as a substitute if it has lower hysteresis and data rate?

A: MAX3243ECWI+ is listed as a functional equivalent based on matching driver/receiver configuration and 28-SOIC packaging. However, the 300mV hysteresis and 250kbps data rate represent parameter reductions. Selection should be based on specific application requirements for signal integrity and communication speed.

Q: Can I use these parts interchangeably in existing designs?

A: Mechanical and electrical compatibility is confirmed for all listed parts. However, PCB layout, signal routing, and application-specific requirements should be evaluated. Consult individual manufacturer datasheets for detailed pin assignments and electrical characteristics before implementation.