Microchip Technology XLT64PT2

Overview

XLT64PT2 from Microchip Technology is a discontinued QFP transition socket designed to bridge 64-lead DIP-based debug hardware (e.g., MPLAB ICE 2000/4000 device adapters) to 64-lead production QFP target boards with 0.5 mm pitch. It comprises an adapter socket for DIP-style emulator interfaces and a surface-mount QFP header for soldering onto target PCBs. Used in embedded microcontroller development for PIC® and dsPIC® devices, it enables identical prototype and production board layouts.

For engineers reviewing the XLT64PT2 datasheet, XLT64PT2 pinout, XLT64PT2 application, or XLT64PT2 equivalent, key selection criteria include QFP pitch compatibility (0.5 mm), lead count (64), mechanical footprint alignment with target SOIC/SSOP/QFP land patterns, and support for in-circuit debugging of Microchip 8-bit and 16-bit MCUs during early-stage firmware validation.

Technical Context

The XLT64PT2 implements a passive mechanical interface-no active circuitry, power, or signal conditioning. Its design strictly maintains 1:1 pin mapping between the DIP adapter side (male pins) and the QFP header side (surface-mount terminals), preserving signal integrity for debug clock, data, and control lines. All electrical paths are direct copper traces with gold-plated contacts rated for >50 mating cycles.

It is mechanically engineered for use with Microchip's QFP device adapters (e.g., DAF-QFP series) and requires precise PCB land pattern adherence per Microchip's recommended layout guidelines-including via placement restrictions, solder mask clearance, and thermal pad isolation-to prevent solder bridging or misalignment during reflow.

Key Specifications

Availability

XLT64PT2 is available at Aetrix Electronics and suitable for embedded MCU prototyping, in-circuit debugger integration, and production-ready board validation requiring stable component supply despite its discontinued status.

Supply support for XLT64PT2 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Microchip Technology Inc. is a U.S.-based semiconductor manufacturer specializing in microcontrollers, analog devices, and development tools, certified to ISO/TS-16949:2002 and ISO 9001:2000.

The XLT64PT2 belongs to Microchip's Transition Socket product line, engineered to eliminate package-format mismatches between legacy DIP-based debug hardware and modern surface-mount target boards-enabling identical PCB layouts across prototype and production phases.

FAQ

Is XLT64PT2 still in production?

No, XLT64PT2 is officially discontinued per Microchip's DS51194S specification. It has been replaced by XLT64PT5, which supports the same 64-lead QFP (0.5 mm) interface but with updated mechanical tolerances and enhanced solder reliability. Aetrix Electronics maintains limited legacy stock of XLT64PT2 for continuity support, subject to availability.

What is the pin pitch supported by XLT64PT2?

XLT64PT2 supports a 0.5 mm pitch on the QFP header side, matching standard Microchip 64-lead TQFP and MQFP packages. This pitch is confirmed in the DS51194S datasheet and is critical for correct alignment with target board land patterns-using it with 0.65 mm or 0.8 mm QFP footprints will result in mechanical misfit and solder joint failure.

Can XLT64PT2 be used with non-Microchip debuggers?

XLT64PT2 is mechanically and electrically compatible only with Microchip's QFP device adapters (e.g., DAF-QFP series) and associated in-circuit emulators like MPLAB ICE 2000/4000. Its DIP-side footprint and pinout follow Microchip-specific mechanical standards; third-party debuggers with non-conforming DIP headers may not achieve reliable contact or correct pin alignment.

Does XLT64PT2 require special soldering processes?

Yes - Microchip specifies controlled soldering with tip temperatures between 300°C and 325°C, and recommends PACE mini-wave or equivalent soldering iron tips. The XLT64PT2's fine-pitch QFP header demands precise thermal profiling to avoid tombstoning, solder bridging, or pad lifting; reflow profiles must follow DS51194S Section "QFP TRANSITION SOCKET SOLDERING TIPS".

What is the replacement part number for XLT64PT2?

The official replacement for XLT64PT2 is XLT64PT5, as explicitly stated in Microchip's DS51194S documentation ("XLT64PT2 (Discontinued – see XLT64PT5)"). XLT64PT5 retains identical 64-lead, 0.5 mm QFP functionality but features improved mechanical stability and updated land pattern recommendations for higher-yield assembly.