Microchip Technology AC244027

Overview

AC244027 from Microchip Technology is a Processor Extension Pak (PEP) containing a debug header designed for in-circuit debugging of PIC18F13K50 and PIC18F14K50 microcontrollers. It integrates the PIC18F14K50-ICE device, supports 5.5V VDD operation, uses a 20-pin DIP footprint, and enables full hardware debugging via MPLAB REAL ICE, ICD 3, or PICkit 3 tools without consuming target board I/O pins.

For engineers reviewing the AC244027 datasheet, AC244027 pinout, AC244027 application, or AC244027 equivalent, this PEP delivers production-ready debug capability for USB-enabled 8-bit MCUs in space-constrained designs - especially where preserving all GPIOs during development is critical.

Technical Context

The AC244027 implements a dedicated debug interface using the PIC18F14K50-ICE silicon variant, which embeds on-chip debug circuitry with dedicated MCLR/VPP, ICSPCLK, and ICSPDAT pins. It routes these signals through a 6-pin modular connector to the debugger and provides a 20-pin DIP socket for direct insertion into target boards.

This PEP supports high-speed USB-based debugging workflows in MPLAB X IDE, requires no target firmware modification, and preserves factory calibration bits for internal oscillator and bandgap references - ensuring consistent timing and analog performance across debug and production firmware builds.

Key Specifications

Availability

AC244027 is available at Aetrix Electronics and suitable for embedded USB development, low-pin-count MCU prototyping, and production-grade firmware validation requiring stable component supply and long-term toolchain continuity.

Supply support for AC244027 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 and ISO 9001 standards.

The AC244027 belongs to Microchip's Processor Extension Pak product line, engineered to extend debugging capability to low-pin-count PIC MCUs by offloading debug circuitry onto a replaceable header - enabling cost-effective production parts and full-featured development.

FAQ

What is the AC244027 used for?

The AC244027 is a Processor Extension Pak that provides hardware debugging capability for PIC18F13K50 and PIC18F14K50 microcontrollers. It contains a PIC18F14K50-ICE device mounted on a debug header with a 20-pin DIP socket and 6-pin modular connector. The AC244027 allows full in-circuit debugging using MPLAB REAL ICE, ICD 3, or PICkit 3 without modifying the target board layout or sacrificing I/O pins on the production MCU.

Does the AC244027 include the actual microcontroller?

Yes - the AC244027 includes the PIC18F14K50-ICE device pre-mounted on the debug header. This is a special silicon variant with on-board debug circuitry, distinct from standard production PIC18F14K50 parts. The AC244027 does not contain a generic or blank MCU; it ships with the debug-enabled device installed and ready for immediate use with compatible debug tools.

Can the AC244027 be used to program production devices?

No - the AC244027 is designed exclusively for debugging, not programming. It supports debug operations (breakpoints, stepping, register inspection) in MPLAB X IDE when selected under the Debug menu. To program standard production PIC18F13K50 or PIC18F14K50 devices, use tools like the MPLAB ICD 3 or PICkit 3 configured as programmers, or the Universal Programming Module (AC162049).

What debug tools are compatible with the AC244027?

The AC244027 is officially supported with the MPLAB REAL ICE in-circuit emulator, MPLAB ICD 3 in-circuit debugger, and PICkit 3 in-circuit debugger. These tools connect via the header's 6-pin modular connector and communicate using the ICSP protocol. Compatibility is confirmed in Microchip's DS50001292W specification and MPLAB X IDE device setup wizard.

Is the AC244027 suitable for production programming or only development?

The AC244027 is strictly a development and debug tool - not intended for production programming or deployment. Its purpose is to enable hardware-assisted debugging during firmware development. Production programming must be performed separately using dedicated programmers (e.g., MPLAB PM3, PICkit 3 in programmer mode) or in-circuit serial programming on the final target board.