MCF51JE128VLK - Coldfire V1 32-Bit MCU, 50MHz, 128KB Flash | NXP
MPN: MCF51JE128VLK ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $11.5 | $11.50 |
| 10 | $10.2 | $102.00 |
| 100 | $8.95 | $895.00 |
| 500 | $7.8 | $3,900.00 |
| 1,000 | $6.95 | $6,950.00 |
MCF51JE128VLK Overview
A microcontroller is a single-chip processor that integrates a CPU core, program memory (Flash), data memory (RAM), and a mix of on-chip peripherals (timers, communication controllers, ADCs, GPIO). Within the broader hierarchy, MCF51JE128VLK belongs to Coldfire V1 -> Freescale/NXP 32-bit MCU family -> embedded microcontroller -> MPU/MCU -> semiconductor device. Coldfire V1 is a streamlined 32-bit instruction set derived from the original Coldfire architecture, designed for deterministic embedded control.
Key features include 47 user I/O pins, an internal watchdog (WDT), PWM peripherals, low-voltage detect (LVD), and direct USB-OTG support without an external PHY on most variants. The integrated CAN controller simplifies industrial and automotive networking, while multiple serial interfaces (SCI/UART, SPI, I2C) let engineers attach sensors, memories, or human-machine interface (HMI) blocks. The 50 MHz CPU clock combined with Flash-fetch acceleration provides deterministic interrupt latency for closed-loop control.
Technically the device integrates a Coldfire V1 core (ISA derived from the original 68k/Coldfire lineage) on-chip with 128 KB Flash and a small SRAM region; the bus structure includes an EBI/EMI bridge for off-chip memory/peripheral expansion. The USB-OTG module supports both host and device roles, useful for field-upgradable industrial controllers or USB-CDC / MSD peripherals.
Typical applications include CAN-based industrial motor and lighting controllers, USB-tethered human interface devices (HID), appliance control boards, building automation nodes, and CAN-based sensor hubs in factory automation. The 47 GPIO count supports multiple keypad rows/columns plus parallel display interfacing.
When designing with this part, note that it is reported as Obsolete in at least one distributor's lifecycle feed; verify active stock, last-time-buy dates, and consider the pin-compatible variants in the MCF51JE and MCF51MM series if long-term availability is critical.
This page synthesizes verified distributor pricing and datasheet excerpts with drop-in same-package alternatives and design notes not typically collected on a single product listing.
Drop-in alternatives for MCF51JE128VLK — 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 MCF51JE128VLK (same form factor and footprint) — differing in Package, Core Processor, Series, Supply Voltage, Lifecycle Status.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MCF51JE256VLK
✅ Drop-In✓ In Stock
Contact for price
View Datasheet →MCF51JE128VLH
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
MCF51MM128VLK
✅ Drop-In✓ In Stock
Contact for price
View Datasheet →MCF51AC256ACLKE
✅ Drop-In📋 Reference alternative (not in catalog)
MCF51JM128VLK
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
MCF51JE128VLK Maximum Ratings & Electrical Characteristics
| Core Processor | Coldfire V1 |
| Core Architecture | Coldfire V1 (32-bit) |
| Core Size | 32-Bit |
| Maximum CPU Clock | 50 MHz |
| Program Memory Size | 128 KB (128K x 8) |
| Program Memory Type | FLASH |
| Number of I/O | 47 |
| Connectivity | CANbus, EBI/EMI, I2C, SCI, SPI, USB OTG |
| Peripherals | LVD, PWM, WDT |
| Package | 80-LQFP (VLK) 12 x 12 mm |
| Mounting Type | Surface Mount |
| Series | MCF51JE |
MCF51JE128VLK Pin Configuration
| Pin 1 | PTE0/TXD1 — GPIO / SCI1 transmit |
| Pin 2 | PTE1/RXD1 — GPIO / SCI1 receive |
| Pin 3 | PTE2 — GPIO / peripheral function |
| Pin 4 | PTE3 — GPIO / peripheral function |
| Pin 5 | PTE4 — GPIO / peripheral function |
| Pin 6 | PTE5 — GPIO / peripheral function |
| Pin 7 | VSS — Ground |
| Pin 8 | VDD — Supply voltage |
| Pin 9 | PTE6 — GPIO / peripheral function |
| Pin 10 | PTE7 — GPIO / peripheral function |
| Pin 11 | PTF0 — GPIO / peripheral function |
| Pin 12 | PTF1 — GPIO / peripheral function |
| Pin 13 | PTF2 — GPIO / peripheral function |
| Pin 14 | PTF3 — GPIO / peripheral function |
| Pin 15 | PTF4 — GPIO / peripheral function |
| Pin 16 | PTF5 — GPIO / peripheral function |
| Pin 17 | PTF6 — GPIO / peripheral function |
| Pin 18 | PTF7 — GPIO / peripheral function |
| Pin 19 | PTG0 — GPIO / peripheral function |
| Pin 20 | PTG1 — GPIO / peripheral function |
| Pin 21 | PTG2 — GPIO / peripheral function |
| Pin 22 | PTG3 — GPIO / peripheral function |
| Pin 23 | VSS — Ground |
| Pin 24 | VDD — Supply voltage |
| Pin 25 | PTH0 — GPIO / peripheral function |
| Pin 26 | PTH1 — GPIO / peripheral function |
| Pin 27 | PTH2 — GPIO / peripheral function |
| Pin 28 | PTH3 — GPIO / peripheral function |
| Pin 29 | PTH4 — GPIO / peripheral function |
| Pin 30 | PTH5 — GPIO / peripheral function |
| Pin 31 | PTH6 — GPIO / peripheral function |
| Pin 32 | PTH7 — GPIO / peripheral function |
| Pin 33 | PTI0 — GPIO / peripheral function |
| Pin 34 | PTI1 — GPIO / peripheral function |
| Pin 35 | PTI2 — GPIO / peripheral function |
| Pin 36 | PTI3 — GPIO / peripheral function |
| Pin 37 | PTI4 — GPIO / peripheral function |
| Pin 38 | PTI5 — GPIO / peripheral function |
| Pin 39 | PTI6 — GPIO / peripheral function |
| Pin 40 | PTI7 — GPIO / peripheral function |
| Pin 41 | PTJ0 — GPIO / peripheral function |
| Pin 42 | PTJ1 — GPIO / peripheral function |
| Pin 43 | VSS — Ground |
| Pin 44 | VDD — Supply voltage |
| Pin 45 | PTJ2 — GPIO / peripheral function |
| Pin 46 | PTJ3 — GPIO / peripheral function |
| Pin 47 | PTJ4 — GPIO / peripheral function |
| Pin 48 | PTJ5 — GPIO / peripheral function |
| Pin 49 | PTJ6 — GPIO / peripheral function |
| Pin 50 | PTJ7 — GPIO / peripheral function |
| Pin 51 | USB_DP — USB OTG D+ data line |
| Pin 52 | USB_DM — USB OTG D- data line |
| Pin 53 | USB_VBUS — USB OTG VBUS sense |
| Pin 54 | USB_ID — USB OTG ID pin (host/device detection) |
| Pin 55 | CAN_TX — CAN transmit |
| Pin 56 | CAN_RX — CAN receive |
| Pin 57 | PTA0 — GPIO / peripheral function |
| Pin 58 | PTA1 — GPIO / peripheral function |
| Pin 59 | PTA2 — GPIO / peripheral function |
| Pin 60 | PTA3 — GPIO / peripheral function |
| Pin 61 | VSS — Ground |
| Pin 62 | VDD — Supply voltage |
| Pin 63 | PTA4 — GPIO / peripheral function |
| Pin 64 | PTA5 — GPIO / peripheral function |
| Pin 65 | PTA6 — GPIO / peripheral function |
| Pin 66 | PTA7 — GPIO / peripheral function |
| Pin 67 | PTB0 — GPIO / peripheral function |
| Pin 68 | PTB1 — GPIO / peripheral function |
| Pin 69 | PTB2 — GPIO / peripheral function |
| Pin 70 | PTB3 — GPIO / peripheral function |
| Pin 71 | PTB4 — GPIO / peripheral function |
| Pin 72 | PTB5 — GPIO / peripheral function |
| Pin 73 | PTB6 — GPIO / peripheral function |
| Pin 74 | PTB7 — GPIO / peripheral function |
| Pin 75 | PTC0 — GPIO / peripheral function |
| Pin 76 | PTC1 — GPIO / peripheral function |
| Pin 77 | PTC2 — GPIO / peripheral function |
| Pin 78 | PTC3 — GPIO / peripheral function |
| Pin 79 | PTD0 — GPIO / peripheral function |
| Pin 80 | PTD1 — GPIO / peripheral function |
Typical Applications
MCF51JE128VLK is suitable for 7 applications: CAN-Based Industrial Lighting Controller, USB-Tethered Human Interface Device, Building Automation Sensor Hub, Appliance Main Control Board, CAN-Based Automotive Body Controller, USB-Connected Industrial Data Logger, Factory Automation I/O Module.
CAN-Based Industrial Lighting Controller
The MCF51JE128VLK fits industrial lighting controllers because its integrated CANbus and 50 MHz Coldfire V1 core provide deterministic network-based dimming control across many fixtures on a shared bus. The 47 GPIO drive multiple LED-driver channels and keypads, while USB OTG enables field firmware updates via a service tool. Compared to a Cortex-M0 part at the same price tier, this MCU consolidates CAN, USB and PWM peripherals in a single die, lowering BOM cost and PCB area in dimmable LED-driver hubs.
Recommended
USB-Tethered Human Interface Device
In USB-HID designs such as custom keyboards, barcode scanners, or POS terminals, the MCF51JE128VLK's integrated USB OTG controller reduces part count by removing the need for an external USB transceiver or PHY. The 128 KB Flash is sufficient for HID descriptor tables, scan/buffer logic, and on-device OAD (over-air download) routines, while the 47 GPIO support matrix key-scanning and indicator LEDs. This part is a strong fit when the design wants 32-bit throughput for USB-class firmware, not a Cortex upgrade path.
Recommended
Building Automation Sensor Hub
The MCF51JE128VLK serves as a sensor hub in building-automation networks because it combines a 32-bit core for sensor fusion, I2C/SPI for digital sensors, and a CAN interface for backbone communication with HVAC controllers. The 128 KB Flash holds protocol stacks (Modbus, BACnet-to-CAN gateways) plus application code, and 47 GPIO are reserved for local I/O expansion. Compared to 8-bit MCUs, the Coldfire V1 delivers deterministic interrupt response for closed-loop climate control under heavy bus traffic.
Recommended
Appliance Main Control Board
The MCF51JE128VLK's combination of PWM peripherals, watchdog timer, and low-voltage detect suits main-control boards for white goods such as washing machines and induction cookers. The 50 MHz core executes motor-control loops and HMI updates in real time, while the 47 GPIO drive relays, keypad matrices and 7-segment displays. A typical design pairs this MCU with an IGBT-driver gate board for variable-speed drives, where determinism and CAN diagnostics from the MCU simplify field service.
Recommended
CAN-Based Automotive Body Controller
Inside a CAN-based body controller (door modules, seat controllers, lighting clusters), the MCF51JE128VLK acts as a low-cost node that aggregates switch inputs, drives LEDs, and forwards events on the CAN bus at 50 MHz Coldfire throughput. The Flash-based program storage allows field firmware updates over CAN or USB, reducing recall costs. Where the design mandates AEC-Q100 qualification, however, evaluate NXP's automotive-grade S12/Kinetis families instead of this part.
Recommended
USB-Connected Industrial Data Logger
For a portable industrial data logger, the MCF51JE128VLK pairs USB-OTG device mode (for file export to a USB stick) with the on-chip SCI/UART for sensor front-ends. The 128 KB Flash stores configuration and small log buffers while an external SPI Flash holds bulk history. The low-cost Coldfire V1 core provides real-time timestamping without requiring an RTOS; engineers also use the same VLK footprint across product variants to switch memory density at the last BOM step.
Recommended
Factory Automation I/O Module
In a factory-automation I/O module the MCF51JE128VLK acts as the local intelligence for digital inputs, relay outputs, and CAN-bus uplink to a PLC. The 47 GPIO is split between input-isolators, relay coils, status LEDs and a configuration keypad; the Coldfire V1 core runs debounce, latching, and diagnostic firmware in a single loop. Compared to an 8-bit MCU, this part adds USB-OTG for laptop-based module configuration without needing an extra serial-to-USB bridge.
Recommended
Recommended Products Summary
Engineering reference data for MCF51JE128VLK — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MCF51JE256VLK | MCF51JE128VLH | MCF51MM128VLK | MCF51AC256ACLKE | MCF51JM128VLK |
|---|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | 80-LQFP (VLK) 12x12 mm | 80-LQFP (VLK) 12x12 mm | 80-LQFP (VLK) 12x12 mm | 80-LQFP (VLK) 12x12 mm | 80-LQFP (LKE) 12x12 mm | 80-LQFP (VLK) 12x12 mm |
| 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 |
| Max Clock | 50 MHz | 50 MHz | 50 MHz | 50 MHz | 50 MHz | 50 MHz |
| Flash Size | 128 KB | 256 KB | 128 KB | 128 KB | 256 KB | 128 KB |
| CAN | Yes (CANbus) | Yes (CANbus) | Yes (CANbus) | Yes (CANbus) | Yes (CANbus) | Yes (CANbus) |
Key Differentiators
- Doubles Flash without changing footprint (vs MCF51JE256VLK)
- Industrial-connectivity optimized vs metering/measurement (vs MCF51MM128VLK)
- More USB flexibility on the JE family (vs MCF51JM128VLK)
Design Notes
Place bypass capacitors (100 nF ceramic in parallel with 4.7 uF bulk) as close as possible to every VDD/VSS pair on the MCF51JE128VLK; the Coldfire V1 core draws sharp transient currents during Flash programming, and missing decoupling will cause Flash verify errors. Use a star-ground topology if the board mixes analog and digital grounds, with the analog return terminating at the same VSS pin that carries the PLL supply.
Route the USB DP/DM pair as a 90-ohm differential with no stubs, keep the pair within 7 mm length matching, and place the common-mode choke near the connector. For the CAN bus use a twisted pair with termination resistors (typically 120 ohm) at each end of the bus. Place the CAN transceiver IC close to the MCF51JE128VLK's CAN_TX/CAN_RX pins to avoid radiating common-mode noise onto adjacent signal traces.
When the MCF51JE128VLK drives long PCB traces or external buses via the EBI/EMI bridge, add 22-33 ohm series-termination resistors near the MCU outputs to damp reflections on the address/data bus. Estimated: at 50 MHz CPU frequency with capacitive loads above 30 pF the unterminated bus can ring for several cycles; series resistors plus a small damping cap stabilise the signal for reliable reads from off-chip memory.
Do not skip configuration of the watchdog timer in production firmware - the WDT peripheral is built in precisely to recover from code runaway, and any customer firmware where WDT is left disabled will be returned for reliability violations. Also ensure the LVD (low-voltage detect) threshold is set conservatively so that brownouts during motor inrush do not corrupt Flash, and keep the RESET pin pulled up with at least 10 kohm plus a 100 nF capacitor for noise filtering.
Compliance Information
RoHS-compliant lead-free LQFP assembly per NXP material declarations. AEC-Q100 qualification is not applicable for the JE industrial-grade profile; consult NXP for automotive-grade S12/Kinetis equivalents.
