PCF51JM128EVLK - 32-Bit ColdFire V1 MCU, 128KB Flash | NXP
MPN: PCF51JM128EVLK ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $8.92 | $8.92 |
| 10 | $8.21 | $82.10 |
| 100 | $7.34 | $734.00 |
| 500 | $6.62 | $3,310.00 |
| 1,000 | $5.95 | $5,950.00 |
PCF51JM128EVLK Overview
Background Knowledge: A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (Flash/ROM), working memory (RAM), and peripheral interfaces (UART, timers, ADC, GPIO, USB, CAN, etc.). ColdFire V1 is NXP's 32-bit RISC architecture derived from the original Motorola 68000 instruction set, optimized for embedded systems that need higher performance than 8/16-bit MCUs without the overhead of ARM Cortex-M cores. MCF51JM Series specifically adds USB On-The-Go capability, making it a popular choice for USB peripherals and industrial controllers.
Key differentiating features include the integrated USB 2.0 Full-Speed OTG controller (with on-chip transceiver and pull-up/pull-down resistors), 66 general-purpose I/O pins, and a rich peripheral set: 2x SCI (UART), 2x SPI, 2x I2C, 6-channel PWM, a 12-bit ADC, and a 16-bit timer. The 80-LQFP package provides generous pin count for multi-interface designs while remaining hand-solderable for prototyping.
Technical depth: The ColdFire V1 core uses a 16/32-bit variable-length instruction encoding that balances code density with 32-bit throughput. The integrated USB OTG controller supports both device and host roles with internal 3.3V regulator and DP/DM pull resistors, eliminating external PHY components. The Flash controller supports in-application programming (IAP) and byte-level EEPROM emulation, allowing non-volatile data storage alongside the main 128 KB program image.
Typical applications include USB-to-UART bridges, USB human-interface devices (HID), industrial control nodes with CAN connectivity, low-cost sensor hubs, and embedded controllers in appliances. The combination of USB, CAN, and multi-protocol serial interfaces makes it ideal for industrial gateways that aggregate sensor data over CAN and expose it to a host PC via USB.
Design consideration: The USB D+/D- traces must be routed as a 90-ohm differential pair with length matching; bypassing the on-chip 3.3V regulator to power the MCU core requires a 4.7 uF decoupling capacitor on the VREG pin. The device operates from -40C to +85C industrial temperature range.
This page synthesizes distributor availability, drop-in same-package alternatives, and design notes not found in the manufacturer datasheet to support sourcing and design decisions.
Drop-in alternatives for PCF51JM128EVLK — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MCF51JM128EVLK
✅ Drop-In📋 Reference alternative (not in catalog)
PCF51JM128VLK
✅ Drop-In📋 Reference alternative (not in catalog)
MCF51JM64EVLK
✅ Drop-In📋 Reference alternative (not in catalog)
PCF51JM64EVLK
✅ Drop-In📋 Reference alternative (not in catalog)
MCF51CN128CLH
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PCF51JM128EVLK Maximum Ratings & Electrical Characteristics
| Core Processor | ColdFire V1 |
| Core Size | 32-Bit |
| Core Series | MCF51JM |
| Maximum Clock Speed | 50 MHz |
| Program Memory Size | 128 KB (128K x 8) |
| Program Memory Type | FLASH |
| RAM Size | 16 KB |
| Number of I/O | 66 |
| Package / Case | 80-LQFP (14x14 mm) |
| Mounting Type | Surface Mount |
| Oscillator Type | External |
| Connectivity | CAN, I2C, SCI, SPI, USB OTG |
| Peripherals | LVD, PWM, WDT |
| Operating Temperature | -40C to +85C |
| RoHS Status | Compliant |
| Packaging | Tray |
PCF51JM128EVLK 80-lqfp (14x14 mm) Pin Configuration Guide
Pin configuration for PCF51JM128EVLK (80-lqfp (14x14 mm) package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for PCF51JM128EVLK.
Refer to the datasheet for full pin configuration.
Typical Applications
PCF51JM128EVLK is suitable for 6 applications: USB-to-CAN Industrial Gateway, USB HID Peripheral Controller, Low-Cost Sensor Hub with SPI/I2C, Appliance Control Board, Building Automation Node, USB Barcode/RFID Reader.
USB-to-CAN Industrial Gateway
The PCF51JM128EVLK's combined USB OTG and CANbus interfaces make it ideal for low-cost industrial gateways that aggregate sensor data from a CAN bus and expose it to a host PC over USB. With 128 KB of Flash it can hold a full USB-CDC class driver plus a CANopen or J1939 stack; the 50 MHz ColdFire V1 core executes these stacks with low latency. Placed on a small PCB with a USB-B connector and a CAN transceiver (such as the TJA1050), it forms a turnkey gateway. The 80-LQFP package gives access to all 66 GPIO pins for status LEDs, address straps, and an optional RS-232 debug port, while the 16 KB SRAM comfortably buffers incoming CAN frames at 1 Mbit/s.
Recommended
USB HID Peripheral Controller
The integrated USB 2.0 Full-Speed OTG controller with on-chip transceiver enables direct USB-HID device implementation without external PHY. The PCF51JM128EVLK's 128 KB Flash accommodates USB HID report descriptors, bootloader code, and application logic simultaneously. With 66 GPIO pins available on the 80-LQFP, designers can build custom HID peripherals (keypads, control surfaces, sensor readout modules) at very low BOM cost. The ColdFire V1 core's 50 MHz speed is more than sufficient for HID polling rates of up to 1 kHz with negligible CPU load, leaving headroom for application processing.
Recommended
Low-Cost Sensor Hub with SPI/I2C
The PCF51JM128EVLK's two SPI and two I2C interfaces support simultaneous sensor network connectivity, ideal for multi-sensor data acquisition nodes. Its 12-bit ADC (typical of the MCF51JM series) and 6-channel PWM enable motor-control or LED-driving side tasks. The 50 MHz ColdFire V1 core reads sensor data via SPI at high rates and forwards aggregated values over USB or CAN. At 128 KB Flash, designers can include lightweight RTOS such as FreeRTOS-ColdFire for deterministic sensor polling. The 80-LQFP package allows easy hand-soldering for prototyping before moving to higher-volume QFN-based migration parts.
Recommended
Appliance Control Board
The PCF51JM128EVLK suits white-goods and appliance controllers where USB is used for factory programming/diagnostics and CAN or SCI (UART) connects to power-inverter or motor-driver boards. The PWM channels drive MOSFET gate drivers for washing-machine pumps or HVAC blowers, while the ADC measures motor current and temperature. Industrial -40C to +85C rating covers appliance environments, and the 80-LQFP is robust against the moderate thermal cycles of household products. With 128 KB Flash, the firmware can include USB DFU bootloader plus full application code without external memory.
Recommended
Building Automation Node
Building automation controllers using the PCF51JM128EVLK benefit from its CAN, RS-232 (SCI), and USB interfaces to integrate HVAC, lighting, and access-control subsystems. The 50 MHz ColdFire V1 core handles BACnet or Modbus protocol stacks while the 16 KB SRAM buffers incoming sensor traffic. The 6 PWM channels drive LED dimmers and small valve actuators directly. Industrial temperature range and 80-LQFP package suit DIN-rail enclosure mounting. With 128 KB Flash, designers can field-upgrade firmware over USB or CAN without removing the device from the panel.
Recommended
USB Barcode/RFID Reader
The PCF51JM128EVLK's USB OTG device mode and abundant GPIO make it a low-cost USB HID barcode or RFID reader controller. The 128 KB Flash stores USB HID keyboard-emulation firmware and reader-state logic. The SPI interface connects to RFID transponder front-ends while GPIO scans keypad matrixes or trigger buttons. ColdFire V1's deterministic interrupt latency ensures reliable barcode scanning timing. The 80-LQFP package supports a small PCB integrating the MCU, scanner engine, and a single USB-C connector for both data and power.
Recommended
Recommended Products Summary
Engineering reference data for PCF51JM128EVLK — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MCF51JM128EVLK | PCF51JM128VLK | MCF51JM64EVLK | PCF51JM64EVLK | MCF51CN128CLH |
|---|---|---|---|---|---|---|
| Package | 80-LQFP (14x14) | 80-LQFP (14x14) - same | 80-LQFP (14x14) - same | 80-LQFP (14x14) - same | 80-LQFP (14x14) - same | 80-LQFP (14x14) - same |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Core Processor | ColdFire V1 | ColdFire V1 | ColdFire V1 | ColdFire V1 | ColdFire V1 | ColdFire V1 |
| Program Flash | 128 KB | 128 KB | 128 KB | 64 KB (-50%) | 64 KB (-50%) | 128 KB |
| Maximum Clock Speed | 50 MHz | 50 MHz | 50 MHz | 50 MHz | 50 MHz | 50 MHz |
| USB OTG | Yes | Yes | Yes | Yes | Yes | No |
| CANbus | Yes | Yes | Yes | Yes | Yes | Yes |
| Lifecycle Status | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete |
Key Differentiators
- Full USB OTG with integrated transceiver eliminates external PHY (vs MCF51CN128CLH)
- Pb-free / RoHS compliant version of the same silicon (vs MCF51JM128EVLK)
- Higher Flash density for full-stack firmware (vs MCF51JM64EVLK)
- Same-package silicon revision with packaging-code flexibility (vs PCF51JM128VLK)
Design Notes
Route the USB D+ and D- traces as a 90-ohm differential pair on the top layer, keeping them short and away from switching signals. Match trace lengths within 150 mil. Place the USBLC6-2SC6 ESD protection array as close to the USB connector as possible to suppress electrostatic transients before they reach the MCU pins. Provide a common ground return path beneath the differential pair.
The PCF51JM128EVLK requires a 3.3V regulated supply on its VDD pins; the internal voltage regulator powers the ColdFire core from this rail. Decouple each VDD pin with a 100 nF ceramic capacitor placed within 5 mm of the pin. Add a bulk 4.7 uF tantalum or ceramic capacitor near the VREG pin. The MCU can be powered directly from USB VBUS through a 5V-to-3.3V LDO such as the MAX15062 when no external supply is available.
Do not confuse the PCF51JM128EVLK (lead-free RoHS) with the MCF51JM128EVLK (leaded). Both share the same silicon but only the PCF variant meets current RoHS requirements for new products. When migrating firmware between the two, the on-chip voltage regulator behavior and reset timings are identical. Always check the device marking to confirm the variant during incoming inspection.
The CAN bus signals require a TJA1050 or similar transceiver between the MCU CAN pins and the bus; the MCU's CAN peripheral is a logic-level interface, not bus-capable. Place the transceiver within 25 mm of the MCU and add a 120-ohm termination resistor at each end of the bus. Use twisted-pair cabling and verify the common-mode voltage rating of the chosen transceiver matches the bus topology.
Compliance Information
RoHS compliant per NXP product page. Part is part of the obsolete MCF51JM Series; AEC-Q100 qualification not applicable for this industrial-grade part. Lead-free 'PCF' prefix indicates Pb-free terminal finish.
