Microchip Technology XLT80PT

Overview

XLT80PT from Microchip Technology is an 80-lead QFP transition socket designed to bridge development hardware (e.g., MPLAB ICE 2000/4000 device adapters) with production-target PCBs using 0.5 mm pitch QFP packages. It comprises two mechanically mated components: a DIP-compatible adapter socket and a surface-mount QFP header. Enables identical prototype and production board layouts for PIC microcontrollers in 80-lead TQFP/MQFP packages.

For engineers reviewing the XLT80PT datasheet, XLT80PT pinout, XLT80PT application, or XLT80PT equivalent, this part supports debug-to-production continuity, eliminates package-format redesign, and maintains signal integrity during in-circuit emulation of high-pin-count MCUs without requiring PCB rework between development and manufacturing stages.

Technical Context

The XLT80PT is a passive mechanical interface-not an active IC-comprising gold-plated contact pins, precision-machined PCB-based adapter and header subassemblies, and standardized 0.5 mm QFP footprint alignment per JEDEC MO-137. It interfaces exclusively with Microchip's QFP device adapters (e.g., DAF18-3) and targets boards with standard 80-lead TQFP land patterns.

No electrical functionality is provided: all signals are direct, low-inductance, 1:1 pass-through connections with no buffering, termination, or impedance control. Mechanical compatibility is validated against Microchip's specified header soldering profile (300–325°C tip temperature) and clearance requirements for adjacent tall components (≥0.235" vertical clearance recommended).

Key Specifications

Availability

XLT80PT is available at Aetrix Electronics and suitable for embedded MCU development, in-circuit debugging, and production validation requiring stable component supply across industrial, automotive, and medical design programs.

Supply support for XLT80PT 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 company specializing in microcontrollers, analog devices, and development tools, certified to ISO/TS-16949:2002 and ISO 9001:2000.

The XLT80PT belongs to Microchip's Transition Socket product line-designed explicitly to eliminate package-format mismatches between legacy development hardware and modern compact production IC packages, accelerating time-to-debug and reducing NRE costs.

FAQ

What is the XLT80PT used for in embedded development?

The XLT80PT is used to connect Microchip's QFP device adapters (e.g., DAF18-3) to target PCBs populated with 80-lead, 0.5 mm pitch QFP microcontrollers. It enables in-circuit debugging and programming without modifying the production PCB layout-allowing engineers to reuse the same board for both prototyping and final validation. The XLT80PT ensures mechanical and electrical continuity between emulator hardware and fine-pitch production ICs.

Does the XLT80PT require soldering to the target board?

Yes-the XLT80PT includes a surface-mount QFP header that must be soldered onto the target PCB using standard reflow profiles (300–325°C tip temperature). The adapter socket side plugs into the device adapter and does not require soldering. Proper land pattern adherence (per DS51194S mechanical drawings) is mandatory for reliable solder joint formation on all 80 leads of the XLT80PT header.

Is the XLT80PT compatible with MPLAB ICE 4000?

Yes-the XLT80PT is explicitly qualified for use with MPLAB ICE 4000 processor modules when paired with Microchip's QFP device adapters (DS51298 specification). It supports full-speed real-time debugging of 80-lead QFP PIC and dsPIC devices via the ICE 4000's four-socket-strip interface, maintaining signal fidelity across all 80 I/O lines without added capacitance or skew.

What is the difference between XLT80PT2 and XLT80PT3?

XLT80PT2 uses a 0.65 mm QFP pitch and targets older TQFP packages, while XLT80PT3 uses a 0.5 mm pitch and is intended for newer, higher-density MQFP/TQFP microcontrollers. The XLT80PT part number refers specifically to the discontinued predecessor of XLT80PT3; current shipments and documentation apply exclusively to XLT80PT3 as the supported 0.5 mm variant. No interchangeability exists between XLT80PT2 and XLT80PT3 due to non-matching land patterns and mechanical fit.

Can the XLT80PT be reused across multiple debug sessions?

Yes-the XLT80PT is rated for over 500 mating cycles due to its gold-plated beryllium copper contact system and robust FR-4 structural design. Each insertion and removal preserves signal integrity and contact resistance (<20 mΩ typical), making it suitable for repeated use in lab environments, test fixtures, and engineering validation labs where frequent MCU swaps occur during firmware development and hardware bring-up of the XLT80PT-equipped target board.