LE88266TQC Equivalent & Substitute Parts

Part Overview

The LE88266TQC is a Telecom Interface IC manufactured by Microchip Technology, designed for PCM-based telecom circuit applications with dual-circuit configuration. This component operates across a wide supply voltage range of 4.75V to 35V and is housed in a 64-QFN surface mount package. The part is currently classified as obsolete, making identification of suitable substitute components essential for ongoing system support and new design implementations.

Substiute Parts

LE88266TQC

Microchip TechnologyIn Stock: 20023LE88266TQC Datasheet

Current PartRFQ

LE9622RQC

Microchip TechnologyIn Stock: 1000258LE9622RQC Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LE88266TQC is based on the following critical parameters:

Functional Compatibility: Both the main part and substitute must operate as telecom interface circuits with PCM protocol support.

Manufacturer Consistency: Microchip Technology maintains the LE series product line, ensuring design continuity and technical support alignment.

Interface Protocol: PCM interface capability is the primary functional requirement for telecom circuit substitution.

Compliance Standards: RoHS3 compliance and REACH unaffected status must be maintained across substitute selections.

Packaging and Mounting: Surface mount technology with QFN package form factor ensures mechanical and thermal compatibility with existing PCB layouts.

The LE9622RQC qualifies as a manufacturer-recommended substitute based on these parameters, despite differences in circuit count, voltage specifications, and package pin configuration.

Parameter Comparison

Engineering Selection Recommendations

The LE9622RQC is designated as the manufacturer-recommended substitute for the obsolete LE88266TQC. Selection of this substitute is supported by the following factors:

Product Status Alignment: The LE9622RQC maintains active product status with Microchip Technology, ensuring continued availability, technical documentation, and manufacturing support compared to the obsolete LE88266TQC.

Regulatory Compliance: Both components maintain identical RoHS3 compliance, REACH unaffected status, and ECCN/HTSUS classifications, eliminating regulatory substitution barriers.

Moisture Sensitivity Equivalence: Matching MSL ratings of 3 (168 Hours) ensure equivalent handling, storage, and assembly process requirements.

Interface Protocol Support: The LE9622RQC extends interface capability with dual PCM and SPI support, providing functional flexibility beyond the PCM-only LE88266TQC.

Manufacturer Continuity: Both components are manufactured by Microchip Technology, maintaining design philosophy and technical support consistency within the LE product series.

Frequently Asked Questions (FAQ)

Q: Can the LE9622RQC directly replace the LE88266TQC in existing designs?

A: Direct replacement requires circuit-level evaluation. The LE9622RQC operates with reduced circuit count (1 versus 2), different supply voltage specifications (1.8V, 2.5V, 3.3V versus 4.75V ~ 35V), and different package pin configuration (53-QFN versus 64-QFN). PCB layout and schematic modifications are necessary.

Q: What are the key differences in supply voltage specifications?

A: The LE88266TQC operates across 4.75V to 35V, supporting wide-range industrial and telecom applications. The LE9622RQC operates at discrete voltage levels of 1.8V, 2.5V, and 3.3V, typical for modern low-voltage digital systems. System power architecture must be evaluated for compatibility.

Q: How do the package differences affect PCB implementation?

A: The LE88266TQC uses a 64-pin QFN package, while the LE9622RQC uses a 53-pin QFN (7x7) package. Pin assignments, thermal pad dimensions, and board layout footprints differ. Complete schematic and layout redesign is required for substitution.

Q: Are there any functional differences between the two parts?

A: The LE88266TQC is a dual-circuit telecom interface with PCM support. The LE9622RQC is a single-circuit Subscriber Line Interface Concept (SLIC) device with PCM and SPI interface options. Functional scope differs based on application requirements.

Q: What is the availability status of each component?

A: The LE88266TQC is obsolete with 19,965 units in current inventory. The LE9622RQC is active with 1,000,199 units in inventory, providing superior long-term availability and supply chain stability.