LE88266DLC Equivalent & Substitute Parts

Part Overview

The LE88266DLC is a telecom interface integrated circuit manufactured by Microchip Technology, designed for PCM-based telecommunications applications. This device is classified as obsolete, which necessitates identification of functionally equivalent alternatives for ongoing system support and new designs. The LE88266DLC operates across a wide supply voltage range of 4.75V to 35V and is packaged in an 80-LQFP surface mount configuration with a moisture sensitivity level of 3.

Substiute Parts

LE88266DLC

Microchip TechnologyIn Stock: 26319LE88266DLC Datasheet

Current PartRFQ

LE9622RQC

Microchip TechnologyIn Stock: 1000258LE9622RQC Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LE88266DLC is determined by the following critical parameters:

Manufacturer alignment with Microchip Technology ensures design continuity and technical support consistency. Both the main part and substitute must operate within telecommunications interface standards. The PCM interface requirement is fundamental to system compatibility. RoHS3 compliance and MSL rating of 3 are mandatory for environmental and manufacturing process compatibility. Surface mount packaging is required for board-level integration.

The LE9622RQC qualifies as a manufacturer-recommended substitute based on shared manufacturer origin, interface capability, RoHS3 compliance, and equivalent MSL rating. While the LE9622RQC operates at lower supply voltages (1.8V, 2.5V, 3.3V) and uses a different package format (53-VFQFN), it provides equivalent telecom interface functionality through its Subscriber Line Interface Concept (SLIC) architecture with PCM and SPI interface support.

Parameter Comparison

Engineering Selection Recommendations

The LE9622RQC is the manufacturer-recommended substitute for the obsolete LE88266DLC. Selection of this alternative is supported by active product status, ensuring long-term availability and continued manufacturer support. Both devices maintain ROHS3 compliance and REACH unaffected status, satisfying regulatory requirements for new designs and legacy system replacements.

The transition from LE88266DLC to LE9622RQC requires evaluation of supply voltage compatibility within the target application. The LE88266DLC operates at higher supply voltages (4.75V to 35V), while the LE9622RQC is specified for lower voltage operation (1.8V, 2.5V, 3.3V). Package footprint differences between 80-LQFP and 53-VFQFN require PCB layout modification. The LE9622RQC provides expanded interface capability through SPI support in addition to PCM, offering enhanced system integration flexibility.

Frequently Asked Questions (FAQ)

Q: Why is the LE88266DLC being phased out? A: The LE88266DLC is classified as obsolete by the manufacturer. The LE9622RQC represents the active product line continuation for telecom interface applications.

Q: Can the LE9622RQC directly replace the LE88266DLC without circuit modification? A: Direct pin-for-pin replacement is not possible due to different package formats (80-LQFP versus 53-VFQFN). Supply voltage requirements differ significantly. Circuit redesign is necessary for functional substitution.

Q: What are the key differences in supply voltage between these parts? A: The LE88266DLC operates across 4.75V to 35V, supporting higher voltage applications. The LE9622RQC operates at fixed voltage levels: 1.8V, 2.5V, or 3.3V. Application voltage requirements determine substitution feasibility.

Q: Does the LE9622RQC support PCM interface operation? A: Yes. The LE9622RQC supports both PCM and SPI interfaces, providing compatibility with PCM-based systems while offering additional SPI interface capability.

Q: Are both parts RoHS3 compliant? A: Yes. Both the LE88266DLC and LE9622RQC are ROHS3 compliant with equivalent MSL ratings of 3 (168 hours), satisfying environmental and manufacturing process requirements.

Q: What is the circuit count difference between these devices? A: The LE88266DLC contains 2 circuits, while the LE9622RQC contains 1 circuit. Application requirements for circuit quantity must be evaluated during substitution planning.