LE89156PQC Equivalent & Substitute Parts

Part Overview

The LE89156PQC is a Telecom Interface IC manufactured by Microchip Technology, designed for PCM-based telecom circuit applications in a 48-QFN (7x7) surface mount package. This part is classified as Obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design considerations. The LE89156PQC operates within a supply voltage range of 3.135V to 3.465V and is rated for operating temperatures from -40°C to 85°C. Due to its obsolete status, sourcing equivalent or substitute components becomes necessary for maintenance, repair, and redesign activities.

Substiute Parts

LE89156PQC

Microchip TechnologyIn Stock: 32822LE89156PQC Datasheet

Current PartRFQ

LE9643AQC

Microchip TechnologyIn Stock: 977LE9643AQC Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LE89156PQC is determined by the following critical parameters:

• Manufacturer: Microchip Technology (primary source for compatible telecom interface ICs)
• Category: Interface (functional classification for telecom circuit applications)
• Function: Telecom Circuit with PCM interface support
• Package Type: Surface mount QFN variants with compatible pinout and thermal characteristics
• Voltage Supply Range: 3.135V ~ 3.465V (3.3V nominal operation)
• Operating Temperature Range: -40°C ~ 85°C
• Compliance Standards: ROHS3 Compliant, REACH Unaffected

The identified substitute part LE9643AQC is manufactured by Microchip Technology and operates within the same functional category and voltage specifications. While the LE9643AQC utilizes a 36-QFN package (compared to the 48-QFN of the original), it maintains compatibility within the telecom interface IC product family and shares the same compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

The LE9643AQC is classified as Active product status, providing a current manufacturing source for telecom interface IC applications. Both parts maintain ROHS3 compliance and REACH unaffected status, satisfying regulatory requirements for electronic component deployment.

Selection between the LE89156PQC and LE9643AQC should be based on:

• Availability: The LE9643AQC is actively manufactured and available in current inventory (878 Pcs), whereas the LE89156PQC is obsolete with limited remaining stock (32,745 Pcs).
• Regulatory Compliance: Both parts meet ROHS3 and REACH requirements, ensuring compatibility with current environmental and safety standards.
• Package Considerations: The transition from 48-QFN to 36-QFN requires PCB layout and pinout verification to confirm functional equivalence in the target application.

Frequently Asked Questions (FAQ)

Q: Can the LE9643AQC directly replace the LE89156PQC in existing designs?

A: Direct replacement requires verification of pinout compatibility and circuit functionality. While both are Microchip Technology telecom interface ICs with ROHS3 compliance, the package transition from 48-QFN to 36-QFN necessitates PCB layout assessment and functional testing to confirm suitability for the specific application.

Q: What is the significance of the package difference between 48-QFN and 36-QFN?

A: The package difference indicates a reduction in pin count and physical footprint. This affects PCB layout, thermal management, and circuit integration. Functional equivalence must be confirmed through datasheet comparison and application-specific requirements.

Q: Are both parts compliant with current environmental regulations?

A: Yes. Both the LE89156PQC and LE9643AQC are ROHS3 compliant and REACH unaffected, meeting current environmental and safety standards for electronic component manufacturing and deployment.

Q: Why is the LE89156PQC classified as obsolete?

A: Obsolete status indicates that the manufacturer has discontinued production. The LE9643AQC, classified as Active, represents the current manufacturing alternative within the Microchip Technology telecom interface IC product line.

Q: What should be verified before implementing the LE9643AQC as a substitute?

A: Verification should include pinout compatibility, functional equivalence through datasheet review, PCB layout feasibility for the 36-QFN package, and application-specific performance testing to confirm suitability in the target telecom circuit application.