TOIM5232-TR3 Equivalent & Substitute Parts

Part Overview

The TOIM5232-TR3 is an Infrared Encoder/Decoder IC manufactured by Vishay Semiconductor Opto Division, designed for IrDA communication at 115.2K baud rate in a 20-QFN (4x4) surface mount package. This component is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations. The part operates within a 2.7V to 3.6V supply range and is ROHS3 compliant with MSL-3 moisture sensitivity rating.

Substiute Parts

TOIM5232-TR3

Vishay Semiconductor Opto DivisionIn Stock: 2942TOIM5232-TR3 Datasheet

Current PartRFQ

TIR1000PSR

Texas InstrumentsIn Stock: 18028TIR1000PSR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TOIM5232-TR3 is determined by the following critical parameters:

Functional Compatibility: Both the main part and substitute must perform infrared encoding/decoding operations at IrDA-compatible baud rates.

Electrical Compatibility: Supply voltage ranges must overlap or be compatible with the system design. The TOIM5232-TR3 operates at 2.7V ~ 3.6V. Substitute parts with wider voltage ranges (such as 2.7V ~ 5.5V) are acceptable as they encompass the original operating window.

Package and Mounting: Surface mount technology is required. While package form factors differ (20-QFN versus 8-SO), both are standard surface mount packages suitable for automated assembly.

Compliance and Certification: RoHS3 compliance and REACH unaffected status are maintained across substitute options.

Product Availability: Active product status of substitutes ensures long-term supply chain viability, addressing the obsolescence of the original part.

Parameter Comparison

Engineering Selection Recommendations

The TIR1000PSR from Texas Instruments is the manufacturer-recommended substitute for the obsolete TOIM5232-TR3. Selection of this alternative is justified on the following engineering grounds:

Functional Equivalence: Both components perform infrared encoding and decoding operations compatible with IrDA protocol standards.

Electrical Compatibility: The TIR1000PSR supply voltage range (2.7V ~ 5.5V) fully encompasses the TOIM5232-TR3 operating window (2.7V ~ 3.6V), ensuring direct compatibility in existing 3.3V system designs.

Regulatory Compliance: Both parts maintain ROHS3 compliance and REACH unaffected status, satisfying current environmental and regulatory requirements.

Supply Chain Viability: The TIR1000PSR holds active product status with substantial inventory availability (17,981 pcs), providing long-term procurement security compared to the obsolete TOIM5232-TR3.

Moisture Handling: The TIR1000PSR features MSL-1 rating (unlimited moisture exposure), providing superior moisture tolerance compared to the MSL-3 rating of the original part.

Package Consideration: The transition from 20-QFN to 8-SO packaging requires PCB layout modification. The 8-SO package is a standard industry format with established design guidelines and manufacturing support.

Frequently Asked Questions (FAQ)

Q: Can the TIR1000PSR directly replace the TOIM5232-TR3 without circuit modification?

A: Functional replacement is possible due to equivalent infrared encoding/decoding capability and overlapping voltage specifications. However, the package change from 20-QFN to 8-SO requires PCB layout redesign. Pin-to-pin functional mapping must be verified against device datasheets before implementation.

Q: What is the impact of the voltage range difference (2.7V ~ 3.6V versus 2.7V ~ 5.5V)?

A: The wider voltage range of the TIR1000PSR is advantageous. Systems designed for 3.3V operation fall within both specifications. The substitute part provides additional design flexibility for future applications operating at higher voltages without component change.

Q: Why is the package size different between the main part and substitute?

A: The TOIM5232-TR3 uses a 20-pin QFN package, while the TIR1000PSR uses an 8-pin SOIC package. This reflects different design approaches by the manufacturers. The 8-SO package is a standard surface mount format with established manufacturing processes and lower cost profile.

Q: Does the MSL-1 rating of the TIR1000PSR provide any advantage?

A: Yes. MSL-1 (unlimited moisture exposure) compared to MSL-3 (168 hours) indicates superior moisture resistance. This reduces handling and storage constraints during manufacturing and improves reliability in humid environments.

Q: Are both parts suitable for new design implementations?

A: The TOIM5232-TR3 is obsolete and unsuitable for new designs. The TIR1000PSR, with active product status and established supply chain, is the appropriate choice for new infrared encoder/decoder implementations requiring IrDA compatibility.

Q: What compliance certifications apply to both parts?

A: Both the TOIM5232-TR3 and TIR1000PSR are ROHS3 compliant and REACH unaffected, meeting current environmental and hazardous substance regulations applicable to electronic components.