LA1781M-MPB-E Equivalent & Substitute Parts

Part Overview

The LA1781M-MPB-E is an analog car radio tuner IC manufactured by onsemi, designed for AM and FM radio reception in automotive applications. This component integrates RF tuning functionality in a 64-pin BQFP package. The product is classified as obsolete, making identification of suitable substitute components essential for ongoing system support and new design implementations.

Substiute Parts

LA1781M-MPB-E

onsemiIn Stock: 1191LA1781M-MPB-E Datasheet

Current PartRFQ

TDA7706CB

STMicroelectronicsIn Stock: 2166TDA7706CB Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LA1781M-MPB-E is determined by the following critical parameters:

• Functional Equivalence: Both main and substitute parts must provide AM and FM tuner functionality
• RF Type Compatibility: AM, FM reception capability required
• Package Classification: 64-pin surface mount packages (BQFP and LQFP variants acceptable)
• Mounting Technology: Surface mount configuration
• Moisture Sensitivity: MSL 3 rating maintained
• Regulatory Compliance: REACH and ECCN classifications aligned

The TDA7706CB from STMicroelectronics meets these substitution criteria as an active product with equivalent AM/FM tuner functionality in a 64-pin surface mount package.

Parameter Comparison

Engineering Selection Recommendations

The TDA7706CB is the identified substitute for the obsolete LA1781M-MPB-E based on functional and regulatory alignment. Key selection factors include:

• Product Availability: TDA7706CB is an active product with documented inventory, whereas LA1781M-MPB-E is obsolete
• Compliance Status: Both components maintain REACH Unaffected and EAR99 ECCN classifications
• Automotive Qualification: TDA7706CB carries AEC-Q100 qualification and automotive grade designation, providing enhanced reliability assurance for automotive applications
• RoHS Compliance: TDA7706CB is ROHS3 compliant, meeting current environmental standards
• Package Compatibility: Both utilize 64-pin surface mount configurations with equivalent MSL ratings

Frequently Asked Questions (FAQ)

Q: Can the TDA7706CB directly replace the LA1781M-MPB-E?

A: The TDA7706CB provides functional equivalence in AM/FM tuner operation and maintains compatible package specifications (64-pin surface mount, MSL 3). Pin-level compatibility and circuit integration must be verified during design implementation.

Q: What is the primary difference between the BQFP and LQFP packages?

A: Both are 64-pin surface mount packages with different physical dimensions. The LA1781M-MPB-E uses 64-QIPE (14x14) while the TDA7706CB uses 64-TQFP (10x10). PCB layout and footprint adjustments are required for substitution.

Q: Why is the TDA7706CB recommended over the LA1781M-MPB-E?

A: The LA1781M-MPB-E is classified as obsolete, limiting long-term availability. The TDA7706CB is an active product with AEC-Q100 qualification and ROHS3 compliance, providing superior supply chain continuity and regulatory alignment.

Q: Are moisture sensitivity levels equivalent?

A: Both components maintain MSL 3 (168 Hours) ratings, ensuring equivalent handling and storage requirements during manufacturing and assembly processes.

Q: What regulatory certifications apply to both parts?

A: Both components are REACH Unaffected and classified under ECCN EAR99, with HTSUS code 8542.39.0001, maintaining consistent export and compliance status.