MCF51JF32VFM - ColdFire V1 MCU, 32KB Flash, 50MHz, 32-HVQFN | NXP
MPN: MCF51JF32VFM ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.45 | $6.45 |
| 10 | $5.78 | $57.80 |
| 100 | $5.05 | $505.00 |
| 500 | $4.42 | $2,210.00 |
| 1,000 | $3.95 | $3,950.00 |
MCF51JF32VFM Overview
What is a 32-bit microcontroller? A 32-bit microcontroller is a single-chip computing engine that fetches and executes 32-bit-wide instructions, provides 32-bit ALU operations, and addresses memory through a 32-bit address/data bus. It sits in the part hierarchy of microcontrollers -> microcontrollers/microprocessors -> digital ICs -> semiconductors. Within NXP's portfolio, the MCF51Jx line bridges the gap between the 8-bit S08 family and higher-performance ColdFire V2/V4 devices, giving designers a familiar roadmap with software-compatible peripherals.
Key features include a 32KB (32K x 8) program Flash array, CPU speeds up to 50MHz, integrated FlexMemory for configurable EEPROM emulation, USB On-The-Go/Full-Speed device support, and a rich analog/digital peripheral set. ColdFire V1 combines a streamlined instruction set with deterministic interrupt latency, making it well suited for real-time control tasks.
The architecture is a Harvard-style ColdFire V1 RISC core with tightly-coupled memories and a peripheral bridge to the chip's peripheral IP blocks. FlexMemory allows designers to allocate part of the Flash array as EEPROM, removing the need for an external serial EEPROM in many parameter-storage applications.
Typical applications include USB HID human-interface devices (mouse, keyboard, game controllers), industrial sensor hubs, home appliances, and low-cost point-of-sale peripherals. Its small HVQFN footprint suits dense PCB layouts, while integration of USB plus PWM simplifies bill-of-materials.
A key design consideration is the power budget when USB is enabled: configure VBUS sensing and the on-chip regulator per the reference manual to keep suspend current within USB 2.0 limits.
This page synthesizes cross-reference intel, distributor pricing, and practical design notes not found in the manufacturer datasheet alone.
Drop-in alternatives for MCF51JF32VFM — 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 MCF51JF32VFM (same form factor and footprint) — differing in Package, Core, Flash Memory, Manufacturer, Peripherals.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
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View Datasheet →MCF51JF32VFM Maximum Ratings & Electrical Characteristics
| Core | ColdFire V1 (32-bit) |
| Data Bus Width | 32 bit |
| Maximum Clock Frequency | 50 MHz |
| Program Memory Size | 32 KB (32K x 8) FLASH |
| Package / Case | 32-HVQFN (5x5 mm) |
| Series | MCF51Jx (ColdFire+) |
| Communication Interfaces | I2C, I2S, SPI, UART, USART, USB |
| Peripherals | DMA, LVD, POR, PWM, WDT |
| FlexMemory (Configurable EEPROM) | Yes (Flash allocation) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| Lead Free | Yes |
MCF51JF32VFM 32-hvqfn (5x5 mm) Pin Configuration Guide
Pin configuration for MCF51JF32VFM (32-hvqfn (5x5 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 MCF51JF32VFM.
Refer to the datasheet for full pin configuration.
Typical Applications
MCF51JF32VFM is suitable for 6 applications: USB Human Interface Devices (HID), Industrial Sensor Aggregators, Home Appliance Control Boards, Point-of-Sale (POS) Terminal Peripherals, Low-Cost IoT Edge Nodes, Automotive Interior Hubs.
USB Human Interface Devices (HID)
The MCF51JF32VFM integrates a USB 2.0 Full-Speed device controller and the ColdFire V1 50MHz core, making it a strong fit for HID peripherals such as keyboards, mice, gamepads, and remote controls. Compared with external-USB-transceiver microcontroller approaches, the JF32 reduces BOM by integrating the PHY and pull-up resistors, while 32KB of Flash comfortably fits most HID class descriptors and report handlers. Designers should size FlexMemory for nonvolatile configuration storage (key maps, calibration) to avoid adding an external EEPROM.
Recommended
Industrial Sensor Aggregators
With its 50MHz ColdFire V1 deterministic interrupt controller, DMA support, and LVD/POR hardening, the MCF51JF32VFM serves as a sensor aggregator front-end in industrial panels. The chip can poll I2C and SPI sensors at high rate, buffer reads in DMA channels, and forward summaries via UART or USB to a host PLC. The 32KB Flash budget is adequate for protocol stacks like Modbus RTU plus 8-12 sensor drivers. Industrial-grade temperature operation lets the design survive -40C cold-box environments.
Recommended
Home Appliance Control Boards
The MCF51JF32VFM's small 5x5 mm HVQFN package, integrated PWM timers, and WDT are well-suited for compact appliance control boards in dishwashers, microwaves, and small motor drives. The ColdFire V1 core delivers deterministic interrupt response needed for closed-loop control of small brushless DC motors. FlexMemory can store user presets and run-time counters, eliminating a separate EEPROM. The chip's PWM plus ADC (when available in the package variant) simplifies BLDC commutation logic on the same die.
Recommended
Point-of-Sale (POS) Terminal Peripherals
POS peripherals such as barcode scanners, PIN pads, and receipt printers benefit from the MCF51JF32VFM's USB, UART, and SPI peripherals combined with its tamper-monitor-friendly watchdog. The 50MHz ColdFire V1 core is sufficient to run USB HID class plus simple encryption for token authentication. FlexMemory stores merchant configuration keys, and the on-chip LVD detects power-loss events for safe transaction rollback. Compared with discrete USB chipsets, this design lowers PCB area and BOM cost in space-constrained terminals.
Recommended
Low-Cost IoT Edge Nodes
For IoT edge devices that need USB-based provisioning or firmware updates, the MCF51JF32VFM integrates USB device, I2C, and SPI - sufficient for sensor data collection plus tethered firmware update. The ColdFire V1 core's deterministic performance simplifies real-time sensor fusion, while 32KB Flash holds a small TCP/IP-over-USB stack or vendor-specific telemetry protocol. Putting VBUS detection on the dedicated pin lets the device detect USB host presence and switch from battery to bus power cleanly.
Recommended
Automotive Interior Hubs
Although not AEC-Q100 qualified, the MCF51JF32VFM serves well in non-safety automotive interior domains such as rear-seat USB charging ports, ambient lighting controllers, and HVAC accessories. Its wide operating temperature range and on-chip peripherals (PWM, DMA, WDT, LVD) help with harsh electrical environments. Engineers should pair the chip with external ESD protection on USB lines and verify qualification needs before deploying in OEM vehicle platforms; for safety-critical modules the Q1-grade Kinetis KE series is recommended.
Recommended
Recommended Products Summary
Engineering reference data for MCF51JF32VFM — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MCF51JE256VML | MCF51JM64VQH | MCF51QE32CLH |
|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | 32-HVQFN (5x5) | 32-HVQFN (5x5) [verify] | 32-HVQFN (5x5) | 32-HVQFN (5x5) [verify] |
| Core | ColdFire V1 (32-bit) | ColdFire V1 (32-bit) | ColdFire V1 (32-bit) | ColdFire V1 (32-bit) |
| Program Flash | 32 KB | 256 KB | 64 KB | 32 KB |
| FlexMemory (EEPROM Emulation) | Yes | Yes | Yes | Yes |
| USB | Full-Speed Device | Full-Speed Device | OTG | Device |
| Max Clock Frequency | 50 MHz | 50 MHz | 50 MHz | 50 MHz |
| Primary Use Case | Cost-optimized USB HID / peripherals | Mid-range ColdFire+ rich peripheral apps | OTG applications | ADC-rich analog control |
Key Differentiators
- ColdFire V1 in smallest NXP 32-bit MCU package (vs MCF51JE256VML)
- FlexMemory EEPROM emulation on-chip (vs MCF51JM64VQH)
- Cost-optimized peripheral mix (vs MCF51QM32VFM)
Design Notes
Estimated: At 50MHz core with internal regulator active, package power is dominated by I/O toggling rather than core quiescent current. For typical USB HID workloads, junction temperature rise stays modest. Mount the 32-HVQFN's exposed pad on a 1 sq cm copper pour to keep within the recommended thermal envelope under 105C ambient.
According to the MCF51Jx reference manual, place the 0.1uF VDD decoupling capacitors as close as possible to each supply pin, with an additional 4.7uF bulk capacitor near the regulator output. Keep the USB D+/D- traces matched in length and routed over a continuous ground plane to meet USB 2.0 signal-integrity margins.
Do not configure FlexMemory beyond the device's guaranteed endurance; reserve a dedicated Flash block for EEPROM emulation to keep wear leveling deterministic. When enabling USB, the VBUS detection pin must be tied through a proper resistor divider, and code must clear the USB suspend bit to stay under USB 2.0 suspend current limits.
Route the 32-HVQFN's exposed pad stitch vias on a 0.5 mm pitch to minimize thermal impedance, and avoid running high-frequency signals over the pad split. Place the external 8 MHz crystal within 5 mm of the XTAL pins, with a guard ring tied to ground, to keep the PLL jitter within the ColdFire V1 spec.
Compliance Information
RoHS compliant per NXP product information page; not AEC-Q100 qualified - choose Kinetis KE family for automotive safety roles.
