TRS3243IDW RS232 Transceiver Equivalent & Substitute Parts

Part Overview

The TRS3243IDW is a full-duplex RS232 transceiver manufactured by Texas Instruments, designed for serial communication applications requiring 3 drivers and 5 receivers in a 28-SOIC surface mount package. This part is discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives from active product lines. Substitute parts must maintain compatibility across electrical specifications, mechanical packaging, and operational parameters to ensure direct replacement capability in existing designs.

Substiute Parts

TRS3243IDW

Texas InstrumentsIn Stock: 1079TRS3243IDW Datasheet

Current PartRFQ

MAX3243ECWI+

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

MFR RecommendedRFQ

MAX3244ECWI+

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

MFR RecommendedRFQ

MAX3245EEWI+

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

MFR RecommendedRFQ

MAX3241EEWI+

Analog Devices Inc./Maxim IntegratedIn Stock: 2166MAX3241EEWI+ Datasheet

Parametric EquivalentRFQ

MAX3243EEWI+

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

Parametric EquivalentRFQ

MAX3243IDW

Texas InstrumentsIn Stock: 806MAX3243IDW Datasheet

Parametric EquivalentRFQ

MAX3244EEWI+

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

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict parameter matching across the following critical criteria:

Primary Compatibility Requirements:

• RS232 protocol and full-duplex transceiver architecture
• 3 drivers and 5 receivers configuration
• 28-SOIC surface mount package (0.295", 7.50mm Width)
• Supply voltage range: 3V to 5.5V
• Data rate: 250 kbps minimum
• Operating temperature range: -40°C to 85°C (or compatible subset)
• RoHS3 compliance and MSL 1 rating

Substitution Categories:

MFR Recommended Substitutes (Full parameter alignment with active product status):

• MAX3244ECWI+ and MAX3243ECWI+ meet all primary requirements with active manufacturing status

Parametric Equivalents (Identical electrical and mechanical specifications):

• MAX3241EEWI+, MAX3243EEWI+, MAX3244EEWI+, and MAX3243IDW (Texas Instruments variant) provide complete parameter equivalence with extended temperature range support

Enhanced Performance Alternative:

• MAX3245EEWI+ offers identical mechanical and electrical compatibility with upgraded data rate capability (1 Mbps vs. 250 kbps)

Parameter Comparison

Engineering Selection Recommendations

For Extended Temperature Range Applications (-40°C to 85°C): Select from MAX3241EEWI+, MAX3243EEWI+, MAX3244EEWI+, MAX3245EEWI+, or MAX3243IDW. These parts maintain full operational specifications across the complete temperature range of the original TRS3243IDW. MAX3245EEWI+ provides additional margin with 1 Mbps data rate capability while preserving all other parameters.

For Standard Temperature Range Applications (0°C to 70°C): MAX3243ECWI+ and MAX3244ECWI+ are suitable alternatives with active manufacturing status and high inventory availability. MAX3243ECWI+ features reduced receiver hysteresis (300 mV vs. 500 mV), which may improve noise immunity in certain applications.

For Direct Pin-Compatible Replacement: MAX3243IDW (Texas Instruments) provides identical specifications and maintains the original manufacturer source while offering active product status and improved availability.

Compliance and Certification: All substitute parts maintain ROHS3 compliance, MSL 1 rating, and identical mechanical packaging (28-SOIC). No additional qualification or design modification is required for substitution within the specified parameter ranges.

Frequently Asked Questions (FAQ)

Q: Can MAX3243ECWI+ replace TRS3243IDW in applications requiring -40°C operation? A: No. MAX3243ECWI+ operates from 0°C to 70°C. For extended temperature range requirements, use MAX3241EEWI+, MAX3243EEWI+, MAX3244EEWI+, or MAX3245EEWI+.

Q: What is the significance of receiver hysteresis differences between substitute parts? A: Receiver hysteresis affects input threshold switching behavior. TRS3243IDW specifies 500 mV hysteresis. MAX3243ECWI+ provides 300 mV hysteresis, which may improve noise margin in low-signal applications but requires design validation if the original specification was critical.

Q: Is MAX3245EEWI+ a direct substitute despite its higher data rate? A: Yes, for mechanical and electrical compatibility. The 1 Mbps data rate is a superset capability; applications using 250 kbps operate without modification. All other parameters match TRS3243IDW specifications.

Q: Are all substitute parts available in the same packaging? A: Yes. All listed substitutes use 28-SOIC (0.295", 7.50mm Width) surface mount packaging with identical pinout and mechanical dimensions.

Q: What is the difference between MFR Recommended and Parametric Equivalent classifications? A: MFR Recommended substitutes (MAX3243ECWI+, MAX3244ECWI+) are actively promoted by manufacturers as direct replacements. Parametric Equivalents meet all electrical and mechanical specifications but may have different temperature ranges or hysteresis values requiring application-level validation.