MCF51JU64VHS - 32-bit ColdFire V1 MCU 64KB 50MHz | NXP
MPN: MCF51JU64VHS ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.8 | $6.80 |
| 10 | $6.15 | $61.50 |
| 100 | $5.55 | $555.00 |
| 500 | $5.05 | $2,525.00 |
| 1,000 | $4.6 | $4,600.00 |
MCF51JU64VHS Overview
A microcontroller (MCU) is a single integrated circuit that combines a processor core, memory, and programmable peripherals into one chip, sitting within the broader hierarchy of embedded processors above bare logic ICs and below full application processors. The MCF51JU64VHS targets embedded control designs that need USB device connectivity and mixed-signal peripherals on a low-pin-count footprint.
Key features include a 50 MHz V1 ColdFire core, 64 KB (64K x 8) on-chip flash, voltage operation from 1.71 V to 3.6 V, and an industrial ambient temperature range of -40 C to +105 C. The integrated 12-bit SAR ADC, 12-bit DAC, and analog comparator containing a 6-bit DAC reduce external component count in measurement and control loops. FlexMemory provides configurable embedded EEPROM for data retention without external nonvolatile memory.
The ColdFire+ architecture shares a common peripheral set across the MCF51JF, MCF51JU, MCF51QF, MCF51QU, MCF51QH, and MCF51QM families, all of which NXP states are software and pin compatible, maximizing code reuse and shortening development time. Flash write operation is supported across the full 1.71 V to 3.6 V supply range, and the USB module enables device-mode connectivity for HID, CDC, and custom class applications.
Typical applications include USB-connected industrial sensors and instrumentation, battery-powered portable devices leveraging the 1.71 V minimum supply, and analog front-end control systems using the 12-bit ADC and DAC combination. The 5x5 mm 44-MAPLGA package suits space-constrained two- and four-layer PCB designs.
Designers should note the industrial temperature ceiling of +105 C, which covers most embedded environments but excludes some automotive under-hood positions. Flash write across the full voltage range simplifies battery designs where the rail sags near end of charge.
This page synthesizes distributor availability data, the NXP family compatibility statements, and practical drop-in replacement analysis not consolidated on the manufacturer product page.
Drop-in alternatives for MCF51JU64VHS — 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:
MCF51JU128VHS
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
MCF51JF64VHS
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
MCF51JU64VHS Maximum Ratings & Electrical Characteristics
| Core Processor | ColdFire V1 |
| Core Size | 32-bit |
| Maximum Clock Frequency | 50 MHz |
| Flash Memory | 64 KB (64K x 8) |
| Supply Voltage Range | 1.71 V to 3.6 V |
| Flash Write Voltage Range | 1.71 V to 3.6 V |
| Operating Temperature Range | -40 C to +105 C |
| Package | 44-MAPLGA (5x5 mm) |
| Number of Terminals | 44 |
| Mounting Type | Surface Mount |
| ADC Resolution | 12-bit SAR |
| DAC Resolution | 12-bit |
| Analog Comparator | CMP with 6-bit DAC |
| FlexMemory | Configurable embedded EEPROM |
| USB | USB device module (JU family) |
| Product Family | ColdFire+ MCF51Jx |
| Flash Family Scaling | 32 KB to 256 KB across MCF51Jx portfolio |
| Program Memory Type | FLASH |
| Package Code (JEDEC style) | VQCCN, square no-lead |
MCF51JU64VHS vqccn, square no-lead Pin Configuration Guide
Pin configuration for MCF51JU64VHS (vqccn, square no-lead 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 MCF51JU64VHS.
Refer to the datasheet for full pin configuration.
Typical Applications
MCF51JU64VHS is suitable for 6 applications: USB-Connected Industrial Sensors, Battery-Powered Portable Instruments, Analog Front-End Control Systems, Test and Measurement Equipment, Building Automation and HVAC Controllers, Consumer Peripheral and HID Devices.
USB-Connected Industrial Sensors
The MCF51JU64VHS fits USB-connected sensor nodes because the JU family integrates a USB device module alongside a 12-bit SAR ADC, allowing raw sensor data to be digitized on-chip and streamed to a host PC or industrial controller over a standard USB CDC/HID class. The 1.71 V to 3.6 V supply range and -40 C to +105 C industrial rating cover factory-floor temperature swings, while FlexMemory embedded EEPROM stores calibration coefficients that survive power cycles without an external EEPROM IC. In a typical node, the ADC samples the sensor front end at 12-bit resolution, the ColdFire V1 core applies scaling and filtering, and the USB block reports data to the host. Because USB powers the node in many installs, the 5x5 mm 44-MAPLGA footprint keeps the PCB compact enough for probe-style or DIN-rail form factors.
Recommended
Battery-Powered Portable Instruments
The MCF51JU64VHS is well suited to battery-powered portable instruments because it operates from 1.71 V to 3.6 V and, per the Freescale datasheet, supports flash write across that entire range - so firmware can log calibration and measurement data even as the battery sags near end of charge. The integrated 12-bit DAC can drive bias or stimulus signals for measurement excitation, and the comparator with internal 6-bit DAC reference provides threshold wake-up so the CPU only runs when a parameter crosses a limit, conserving average current. The 44-MAPLGA 5x5 mm no-lead package minimizes board area in handheld enclosures, and the 50 MHz ColdFire V1 core supplies enough throughput for math-heavy conversion routines without moving to a higher-power 32-bit class device. FlexMemory EEPROM further removes an external nonvolatile component from the power budget.
Recommended
Analog Front-End Control Systems
For mixed-signal control loops, the MCF51JU64VHS consolidates the conversion chain on-chip: the 12-bit SAR ADC digitizes sensor outputs, the 12-bit DAC generates actuator or reference drive, and the analog comparator containing a 6-bit DAC provides an independent hardware threshold monitor that can interrupt the CPU without software latency. According to the Freescale datasheet excerpt, these analog blocks are core Jx-family features, so a single 44-MAPLGA device replaces a discrete ADC, DAC, and comparator in moderate-resolution loops - reducing BOM count and board area. The 50 MHz core throughput handles PID-style control updates well within sub-millisecond loop periods, and the 1.71 V minimum supply supports single-cell lithium designs with a regulator. The 12-bit resolution covers most industrial sensor spans where 10-bit is marginal and 16-bit external converters add cost.
Recommended
Test and Measurement Equipment
Benchtop and portable test instruments benefit from the MCF51JU64VHS as a control and communication subsystem: the USB device module connects the instrument to host software for configuration and data transfer, while the 12-bit ADC monitors supply rails, temperature, or auxiliary inputs. The -40 C to +105 C ambient rating covers instrument interiors that warm under load, and the ColdFire V1 50 MHz core manages front-panel interfaces and housekeeping tasks alongside the USB stack. NXP's statement that the MCF51JF, JU, QF, QU, QH, and QM families are software and pin compatible lets instrument makers qualify one PCB across multiple flash sizes and peripheral mixes, reusing the same firmware base across product tiers. The 64 KB flash holds protocol stacks and calibration routines typical of compact instrumentation, with the MCF51JU128VHS drop-in available for feature-rich variants.
Recommended
Building Automation and HVAC Controllers
The MCF51JU64VHS serves building automation nodes such as damper actuators, zone controllers, and sensor hubs, where its industrial -40 C to +105 C range tolerates rooftop and mechanical-room environments. The 12-bit ADC reads NTC thermistors and 0-10 V-scaled inputs through simple dividers, the comparator with 6-bit DAC reference implements hardware over-temperature cutoffs independent of firmware, and the 12-bit DAC drives proportional control outputs. FlexMemory EEPROM stores setpoints and learned schedules through power interruptions without external memory. USB provides commissioning and diagnostics access from a laptop without dedicated programming hardware in the field. Per NXP, the pin compatibility across the ColdFire+ MCF51Jx and Qx families lets one controller PCB scale from basic (JF, no USB) to networked (JU) product variants, amortizing qualification and layout costs across the product line.
Recommended
Consumer Peripheral and HID Devices
The JU family's USB device module makes the MCF51JU64VHS a fit for HID-class consumer peripherals - custom keyboards, encoder panels, gaming inputs, and USB accessories - where the ColdFire V1 core scans matrices and services USB endpoints at 50 MHz with margin. Operation down to 1.71 V supports direct bus-powered designs from the 3.3 V USB rail via a small LDO, and the 44-MAPLGA 5x5 mm package fits slim enclosure profiles. The 12-bit ADC reads thumbstick or potentiometer inputs with adequate resolution for HID axes, and FlexMemory EEPROM retains user configuration profiles through power cycles without an external serial EEPROM. Because NXP documents the JU family as software compatible with the wider ColdFire+ portfolio, accessory makers can reuse USB stacks and drivers across family members, reducing firmware certification effort when scaling the product range.
Recommended
Recommended Products Summary
Engineering reference data for MCF51JU64VHS — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MCF51JU128VHS | MCF51JF64VHS | MCF51JU64VLF |
|---|---|---|---|---|
| Package | 44-MAPLGA (5x5 mm) | 44-MAPLGA (5x5 mm) - same | 44-MAPLGA (5x5 mm) - same | LQFP-64 - different footprint |
| Brand | NXP Semiconductors (Freescale) | NXP Semiconductors (Freescale) | NXP Semiconductors (Freescale) | NXP Semiconductors (Freescale) |
| Core / Frequency | ColdFire V1, 50 MHz | ColdFire V1, 50 MHz | ColdFire V1, 50 MHz | ColdFire V1, 50 MHz |
| Flash Memory | 64 KB | 128 KB (+100%) | 64 KB | 64 KB |
| USB Device Module | Yes (JU family) | Yes (JU family) | No (JF family) | Yes (JU family) |
| Supply Voltage Range | 1.71 V to 3.6 V | 1.71 V to 3.6 V | 1.71 V to 3.6 V | 1.71 V to 3.6 V |
| Pin Compatibility (per NXP) | Reference (JU family) | Pin and software compatible | Pin and software compatible | Software compatible, different package |
| Drop-in on Same PCB | - | Yes | Yes (if package suffix VHS ordered) | No - requires PCB respin |
Key Differentiators
- USB device connectivity in a 44-pin 5x5 mm package (vs MCF51JF64VHS)
- Flash headroom upgrade without respin (vs MCF51JU128VHS)
- Full-range flash write (vs Generic MCUs requiring VDD > 2.7 V for flash program)
- Trade-off: legacy ColdFire architecture (vs ARM Cortex-M0+ MCUs)
Design Notes
The 44-MAPLGA package is a molded land-grid array with no protruding leads; pad geometry must follow the datasheet land-pattern recommendation with the center exposed-pad region used for ground. Use a 0.25-0.3 mm stencil aperture reduction (estimated typical practice for LGA types) and inspect with X-ray or angled AOI because solder joints are hidden under the body. Confirm the exact 5x5 mm land pattern from the current NXP datasheet before layout release, since advance-information datasheets may contain preliminary dimensions that were revised in the final release.
This is an advance-information-era Freescale part now fulfilled largely by Rochester Electronics. Before committing a new design, verify the latest datasheet revision on nxp.com and request product change notices (PCN), since Freescale-to-NXP transitions often include bond-out or fab updates. The package suffix encodes speed and temperature: VHS corresponds to the 50 MHz / -40 to +105 C grade in 44-MAPLGA - do not substitute a different suffix without confirming identical speed and temperature ratings.
Decouple the 1.71-3.6 V supply with 0.1 uF ceramic capacitors at the supply pins plus bulk capacitance per the datasheet typical application. Because flash write is supported down to 1.71 V, designs can log data at low battery voltage, but the brown-out reset threshold should be set below the minimum operating point yet above the level where flash writes become unreliable - consult the electrical tables for the precise flash-write voltage guarantee before finalizing the supervisor setting.
USB device operation requires a 1.5 k pull-up on D+ (full-speed) per the USB 2.0 specification unless the internal pull-up is enabled - check whether the JU family provides an internal pull-up and enable it in the USB control register if so. Keep the D+/D- pair routed as a 90-ohm differential pair with length matching, and place the USB connector within a few centimeters of the MCU to keep stubs short on two-layer boards.
Compliance Information
Compliance data not present in the retrieved web data. Check the NXP product page Quality/Environmental section for RoHS/REACH certificates. This is an industrial-temperature part (-40 to +105 C) and is not marketed as AEC-Q100 automotive qualified.
