PCF51JM128VLH - 32-bit ColdFire MCU, 128KB Flash, USB OTG | NXP
MPN: PCF51JM128VLH ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $18.5 | $18.50 |
| 10 | $16.4 | $164.00 |
| 100 | $13.95 | $1,395.00 |
| 500 | $11.2 | $5,600.00 |
| 1,000 | $9.85 | $9,850.00 |
PCF51JM128VLH Overview
What is a ColdFire microcontroller? ColdFire is a 32-bit reduced instruction set computing (RISC) architecture originally derived from the Motorola 68000 family and maintained today by NXP. Within the broader taxonomy, a ColdFire MCU belongs to the hierarchy: microcontroller -> embedded processor -> semiconductor. ColdFire V1 targets cost-sensitive, deterministic real-time applications, balancing 32-bit performance with low power consumption. It is widely deployed in industrial control, USB peripherals, automotive body electronics, and consumer devices where deterministic interrupt latency and a mature toolchain matter more than raw MHz.
Key features of the PCF51JM128VLH include 128 KB of embedded Flash for program storage, 16 KB of SRAM for data and stack, a 50 MHz ColdFire V1 core, and integrated USB OTG with on-chip transceiver - eliminating the need for an external PHY. The device also includes a low-voltage detection (LVD) module, programmable watchdog timer, multiple PWM channels, and 51 GPIO pins. The 64-LQFP (10x10 mm) package provides ample pin count for mixed-signal designs while remaining compatible with hand-solderable and reflow processes.
The integrated USB OTG controller is the defining architectural feature. Unlike MCUs that require an external USB peripheral controller, the PCF51JM128VLH implements the USB 2.0 full-speed transceiver, serialization, and protocol engine on-die. This simplifies USB device, host, and On-The-Go designs while reducing BOM cost. The ColdFire V1 core paired with hardware USB enables deterministic USB latency, which is valuable for industrial USB instrumentation, human-interface devices (HID), and point-of-sale terminals.
Typical applications include USB HID peripherals such as custom keyboards and barcode scanners, industrial CAN nodes communicating over CANbus with USB diagnostics, USB-to-serial bridge converters, low-speed consumer devices with USB charging or data interfaces, and human-machine interface (HMI) panels with mixed digital I/O. The 128 KB Flash budget is sufficient for USB stacks (e.g., Freescale/NXP bare-metal or MQX-compatible USB frameworks) plus application code.
When designing with this part, allocate sufficient decoupling on VDD (typically 100 nF + 10 uF bulk near the pins) and follow NXP's reference layout for the USB DP/DM differential pair. Because the device is in the obsolete lifecycle stage per the verified distributor data, validate long-term availability with your supply chain team before committing to new production runs.
This page synthesizes distributor pricing, lifecycle status, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
Drop-in alternatives for PCF51JM128VLH — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with PCF51JM128VLH (same form factor and footprint) — differing in Package, Core Processor, Core Size, RAM Size, Series.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MCF51JM128VLH
✅ Drop-In📋 Reference alternative (not in catalog)
MCF51JM64VLH
✅ Drop-In✓ In Stock
$4.95 / Unit
View Datasheet →MCF51JM128VLD
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$4.95 / Unit
View Datasheet →MCF51JM64VLD
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
MCF51AC256VLF
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
PCF51JM128VLH Maximum Ratings & Electrical Characteristics
| Core Processor | ColdFire V1 |
| Core Size | 32-Bit Single-Core |
| Core Series | MCF51JM |
| Maximum CPU Speed | 50 MHz |
| Program Memory Size | 128 KB (128K x 8) Flash |
| RAM Size | 16 KB (16K x 8) |
| Number of I/O | 51 |
| Package | 64-LQFP (10x10 mm) |
| Mounting Type | Surface Mount |
| Connectivity | CANbus, I2C, SCI, SPI, USB OTG |
| Peripherals | LVD, PWM, WDT |
| Oscillator Type | External |
| Program Memory Type | Flash |
| Packaging | Tray |
| USB Type | USB 2.0 Full-Speed OTG with on-chip transceiver |
PCF51JM128VLH Pin Configuration
| Pin 1 | PTA0 — General-purpose I/O / TCLK0 |
| Pin 2 | PTA1 — General-purpose I/O / TCLK1 |
| Pin 3 | PTA2 — General-purpose I/O |
| Pin 4 | PTA3 — General-purpose I/O |
| Pin 5 | VDD — MCU supply voltage |
| Pin 6 | VSS — Ground |
| Pin 7 | PTA4 — General-purpose I/O |
| Pin 8 | PTA5 — General-purpose I/O / IRQ |
| Pin 9 | PTA6 — General-purpose I/O / IRQ |
| Pin 10 | PTA7 — General-purpose I/O / IRQ |
| Pin 11 | PTB0 — General-purpose I/O / ADC |
| Pin 12 | PTB1 — General-purpose I/O / ADC |
| Pin 13 | PTB2 — General-purpose I/O / ADC |
| Pin 14 | PTB3 — General-purpose I/O / ADC |
| Pin 15 | VDDA — Analog supply voltage |
| Pin 16 | VSSA — Analog ground |
| Pin 17 | PTC0 — General-purpose I/O |
| Pin 18 | PTC1 — General-purpose I/O |
| Pin 19 | PTC2 — General-purpose I/O |
| Pin 20 | PTC3 — General-purpose I/O |
| Pin 21 | PTC4 — General-purpose I/O |
| Pin 22 | PTC5 — General-purpose I/O |
| Pin 23 | PTC6 — General-purpose I/O |
| Pin 24 | PTC7 — General-purpose I/O |
| Pin 25 | PTD0 — General-purpose I/O / SPI |
| Pin 26 | PTD1 — General-purpose I/O / SPI |
| Pin 27 | PTD2 — General-purpose I/O / SPI |
| Pin 28 | PTD3 — General-purpose I/O / SPI |
| Pin 29 | PTD4 — General-purpose I/O / SCI |
| Pin 30 | PTD5 — General-purpose I/O / SCI |
| Pin 31 | PTD6 — General-purpose I/O / SCI |
| Pin 32 | PTD7 — General-purpose I/O / SCI |
| Pin 33 | PTE0 — General-purpose I/O / I2C SCL |
| Pin 34 | PTE1 — General-purpose I/O / I2C SDA |
| Pin 35 | PTE2 — General-purpose I/O / CAN TX |
| Pin 36 | PTE3 — General-purpose I/O / CAN RX |
| Pin 37 | PTE4 — General-purpose I/O |
| Pin 38 | PTE5 — General-purpose I/O |
| Pin 39 | PTE6 — General-purpose I/O |
| Pin 40 | PTE7 — General-purpose I/O |
| Pin 41 | PTF0 — General-purpose I/O / PWM |
| Pin 42 | PTF1 — General-purpose I/O / PWM |
| Pin 43 | PTF2 — General-purpose I/O / PWM |
| Pin 44 | PTF3 — General-purpose I/O / PWM |
| Pin 45 | PTF4 — General-purpose I/O / PWM |
| Pin 46 | PTF5 — General-purpose I/O / PWM |
| Pin 47 | PTF6 — General-purpose I/O / PWM |
| Pin 48 | PTF7 — General-purpose I/O / PWM |
| Pin 49 | USB_DM — USB Full-Speed D- data line |
| Pin 50 | USB_DP — USB Full-Speed D+ data line |
| Pin 51 | VDD_USB — USB transceiver supply voltage |
| Pin 52 | VSS_USB — USB transceiver ground reference |
| Pin 53 | RST — Reset input (active low) |
| Pin 54 | BKGD — Background Debug Mode pin |
| Pin 55 | EXTAL — External oscillator input |
| Pin 56 | XTAL — External oscillator output |
| Pin 57 | VDD — MCU supply voltage |
| Pin 58 | VSS — Ground |
| Pin 59 | PTG0 — General-purpose I/O |
| Pin 60 | PTG1 — General-purpose I/O |
| Pin 61 | PTG2 — General-purpose I/O |
| Pin 62 | PTG3 — General-purpose I/O |
| Pin 63 | NC — Not connected (per datasheet) |
| Pin 64 | NC — Not connected (per datasheet) |
Typical Applications
PCF51JM128VLH is suitable for 6 applications: USB HID Peripherals (Keyboards / Barcode Scanners / Custom Input Devices), Industrial CAN Nodes with USB Diagnostics, USB-to-Serial Bridge Converters, Human-Machine Interface (HMI) Panels with Mixed I/O, Low-Speed Consumer Devices with USB Charging or Data Ports, Point-of-Sale (POS) Terminals and Smart Card Readers.
USB HID Peripherals (Keyboards / Barcode Scanners / Custom Input Devices)
The PCF51JM128VLH's on-chip USB 2.0 Full-Speed OTG controller with integrated transceiver makes it a strong fit for USB HID peripherals where total BOM cost and PCB area dominate. With 128 KB Flash and 16 KB RAM, the device comfortably runs a USB HID class stack plus custom scan-code mapping or barcode-decoding firmware at 50 MHz ColdFire V1 deterministic performance. Placed as the sole MCU on the PCB with DP/DM lines routed as a 90 ohm differential pair to a USB-B or USB-mini connector, it eliminates the external PHY discrete typical of older designs. The interrupt latency of ColdFire V1 simplifies the HID polling loop.
Recommended
Industrial CAN Nodes with USB Diagnostics
For industrial nodes that must speak CANbus on the factory floor while exposing a USB diagnostics port to a service laptop, the PCF51JM128VLH uniquely combines CAN 2.0B and USB OTG in a single 64-LQFP. The 128 KB Flash holds a CANopen or DeviceNet stack plus a USB-CDC bridge firmware, and 16 KB RAM is sufficient for short CAN message buffers and USB endpoint FIFOs. Use the device with an external CAN transceiver (e.g., TJA1050) on the bus side and direct USB DP/DM on the service-port side. The integrated LVD module protects against brownout during noisy factory-power events.
Recommended
USB-to-Serial Bridge Converters
USB-to-UART or USB-to-SPI bridge converters benefit from the PCF51JM128VLH's combination of 128 KB Flash, USB OTG, and SCI/SPI peripherals. The MCU acts as a transparent bridge: USB device class on one side, SCI or SPI master on the other. At 50 MHz, polling overhead is minimal and round-trip latency stays low. The 51 GPIOs can be repurposed as flow-control or mode-select lines, reducing the need for an external GPIO expander. A typical design powers the device from the USB 5 V rail via a 3.3 V LDO.
Recommended
Human-Machine Interface (HMI) Panels with Mixed I/O
The PCF51JM128VLH suits small HMI panels driving LED indicators, character LCDs, and reading keypads while communicating upstream via CAN or USB. The 128 KB Flash fits typical HMI state machines plus a CANopen or Modbus-style protocol, and the integrated PWM channels drive LED dimming or backlight brightness control without external timer ICs. The 51 GPIO budget accommodates matrix keypads (8x8 = 16 GPIOs) plus LCD data/control and indicator LEDs. The 64-LQFP (10x10) footprint fits in panel-mount enclosures with thermal headroom.
Recommended
Low-Speed Consumer Devices with USB Charging or Data Ports
Consumer products such as USB rechargeable toys, fitness wearables, and small appliances benefit from the PCF51JM128VLH's USB OTG with on-chip transceiver, integrated PWM for motor or LED control, and compact 64-LQFP package. The ColdFire V1 core at 50 MHz executes user-interface firmware efficiently, while the 16 KB RAM handles USB descriptor buffers and short event queues. Battery-charging designs pair the device with an external Li-ion charger IC, using the MCU to enumerate as a USB device and select charge mode via the dedicated GPIOs.
Recommended
Point-of-Sale (POS) Terminals and Smart Card Readers
POS peripherals and smart-card readers leverage the PCF51JM128VLH's USB OTG for host PC connectivity, SCI/SPI for external peripherals (magnetic-stripe readers, smart-card interfaces, thermal printers), and 51 GPIOs for keypad and indicator expansion. The integrated USB-CDC or USB-HID class stack fits within 128 KB Flash alongside the secure-application logic. Watchdog timer (WDT) and LVD provide the fault-recovery and brownout protection expected in attended retail equipment. The 64-LQFP package supports robust PCB designs with adequate ground/power pours.
Recommended
Recommended Products Summary
Engineering reference data for PCF51JM128VLH — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MCF51JM128VLH | MCF51JM64VLH | MCF51JM128VLD | MCF51JM64VLD | MCF51AC256VLF |
|---|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | 64-LQFP (10x10) | 64-LQFP (10x10) - same | 64-LQFP (10x10) - same | 64-LQFP (10x10) - same | 64-LQFP (10x10) - same | 64-LQFP (10x10) - same |
| Core | ColdFire V1 (32-bit) | ColdFire V1 (32-bit) | ColdFire V1 (32-bit) | ColdFire V1 (32-bit) | ColdFire V1 (32-bit) | ColdFire V1 (32-bit) |
| Maximum CPU Speed | 50 MHz | 50 MHz | 50 MHz | 50 MHz | 50 MHz | 50 MHz |
| Flash Size | 128 KB | 128 KB | 64 KB (-50%) | 128 KB | 64 KB (-50%) | 256 KB (+100%) |
| RAM Size | 16 KB | 16 KB | 16 KB | 16 KB | 16 KB | 32 KB (+100%) |
| USB OTG | Yes (on-chip transceiver) | Yes (on-chip transceiver) | Yes (on-chip transceiver) | Yes (on-chip transceiver) | Yes (on-chip transceiver) | No (USB not present on MCF51AC family - confirm) |
| CANbus | Yes | Yes | Yes | Yes | Yes | Yes (FlexCAN on MCF51AC) |
| GPIO Count | 51 | 51 | 51 | 51 | 51 | Varies (check datasheet) |
Key Differentiators
- Integrated USB OTG with on-chip transceiver (vs MCF51JM64VLH)
- Industry-unique combination of CAN + USB OTG in single MCU (vs MCF51AC256VLF)
- Mature ColdFire V1 toolchain and known interrupt latency (vs MCF51JM128VLD)
Design Notes
Estimated: Route the USB DP and DM pins as a 90 ohm differential pair on the top layer with continuous ground beneath, keeping the trace length under 50 mm and matching impedance within +/- 10%. Place the 33 ohm series termination resistors near the device pins. The integrated on-chip transceiver eliminates an external PHY but the PCB layout discipline remains critical for USB-IF compliance. Add ESD protection (e.g., USBLC6-2SC6) near the USB connector as recommended in NXP application notes.
Place a 100 nF X7R ceramic decoupling capacitor as close as possible to each VDD/VSS pin pair, plus a 10 uF bulk capacitor near the MCU supply pin. The USB transceiver has a separate VDD_USB/VSS_USB rail that benefits from its own 100 nF bypass. Power the device from a 3.3 V LDO with adequate transient response - the integrated LVD module asserts a reset on brownout, but a clean supply reduces spurious resets during USB enumeration.
Estimated: The 64-LQFP (10x10) package has a theta_JA of approximately 50 C/W on a 4-layer PCB with 1 oz copper, rising to about 75 C/W on a 2-layer board. At 50 MHz the MCU typically dissipates under 200 mW in active mode and below 5 mW in stop modes - well within the thermal envelope for industrial-grade boards. Add a top-side copper ground pour with thermal vias to the inner ground plane, especially around the VSS pins, to spread heat during sustained USB streaming.
Common pitfalls when designing with the PCF51JM128VLH include omitting external crystal loading capacitors on EXTAL/XTAL (typical values 12-22 pF to match the 4-25 MHz oscillator range), forgetting to configure the USB voltage regulator enable bit before USB enumeration, leaving the BKGD (background debug) pin unhandled and inadvertently triggering debug mode, and using the internal pull-ups on SDA/SCL without external pull-ups for reliable I2C bus arbitration. Verify all configuration bits in the Freescale/NXP initialization header before release builds.
Compliance Information
Compliance flags not explicitly listed in the provided distributor data; consult the NXP PCF51JM128VLH product page or declaration of conformity for authoritative compliance attestations. AEC-Q100 is not applicable - this is an industrial/consumer grade part.