MCF51JE256CLK - ColdFire V1 32-bit MCU, 256KB Flash | NXP
MPN: MCF51JE256CLK ⚠ Last Time Buy| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $14.2 | $14.20 |
| 10 | $12.85 | $128.50 |
| 100 | $11.42 | $1,142.00 |
| 500 | $10.1 | $5,050.00 |
| 1,000 | $8.95 | $8,950.00 |
MCF51JE256CLK Overview
What is a ColdFire V1 microcontroller? ColdFire V1 is a 32-bit RISC processor architecture derived from the original Motorola 68000 family, optimized for embedded applications that need higher performance than 8/16-bit MCUs but with the deterministic interrupt response and low power consumption required by industrial and consumer systems. The ColdFire V1 core sits within the broader hierarchy of 32-bit microcontroller cores -> microcontroller -> embedded processor -> semiconductor, and competes architecturally with ARM Cortex-M0/M0+ devices while preserving ColdFire instruction-set compatibility for legacy code bases.
The MCF51JE256CLK integrates a 12-bit SAR ADC with up to 20 channels, a 12-bit DAC, multiple timers (FTM, PWT, RTC), an I2C bus, two SCI/UART modules, and an SPI peripheral set. Its high-resolution analog front-end supports precision sensor conditioning in industrial metering and medical instrumentation. The integrated USB 2.0 Full-Speed On-The-Go (OTG) controller with dedicated PHY enables direct device/host/OTG roles without external transceivers.
Typical applications include industrial metering and data loggers, USB HID peripherals, smart sensors, medical monitoring devices, and low-power portable instrumentation. The wide operating voltage range of 2.7V to 5.5V makes it compatible with both 3.3V and 5V system rails. Multiple low-power modes (Wait, Stop, Standby) allow deep power optimization for battery-powered designs.
When designing with this MCU, allocate PCB area for a decoupling cap cluster near each power pin and ensure the USB D+/D- traces are 90-ohm differential-matched and as short as possible. For new designs, verify NXP's PCN notice for the MCF51JE family before committing, as several variants have entered End-of-Life status. The standard 80-LQFP footprint and JTAG/SWD debug path ease migration to alternate members of the JE family.
Drop-in alternatives for MCF51JE256CLK — 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 MCF51JE256CLK (same form factor and footprint) — differing in Package, ADC, DAC, Number of I/O, Connectivity.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MCF51JE128VLK
✅ Drop-In✓ In Stock
$6.95 / Unit
View Datasheet →MCF51JE256CMB
✅ Drop-In✓ In Stock
Contact for price
View Datasheet →MCF51JE256VML
✅ Drop-In✓ In Stock
Contact for price
View Datasheet →MCF51JE256CLH
✅ Drop-In📋 Reference alternative (not in catalog)
MCF51AG96CLK
✅ Drop-In✓ In Stock
$10.4 / Unit
View Datasheet →MCF51MM128VLK
✅ Drop-In✓ In Stock
Contact for price
View Datasheet →MCF51JE256CLK Maximum Ratings & Electrical Characteristics
| Core | ColdFire V1 (32-bit RISC) |
| Core Frequency | 50 MHz (50.3 MHz max) |
| Program Memory (Flash) | 256 KB (256K x 8) |
| RAM | 32 KB (32K x 8) |
| Supply Voltage | 2.7 V to 5.5 V |
| Operating Temperature | -40 C to +85 C |
| Number of I/O | 47 |
| Package | 80-LQFP (12x12 mm) |
| ADC | 12-bit SAR, up to 20 channels |
| DAC | 12-bit |
| USB | USB 2.0 Full-Speed OTG with on-chip PHY |
| Communication Interfaces | 1x I2C, 2x SCI/UART, 1x SPI |
| Timers | FlexTimer (FTM), PWT, RTC |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
MCF51JE256CLK Pin Configuration
| Pin 1 | PTE0/TXD1 — Port E bit 0 / SCI1 transmit |
| Pin 2 | PTE1/RXD1 — Port E bit 1 / SCI1 receive |
| Pin 3 | PTE2 — Port E bit 2 |
| Pin 4 | PTE3 — Port E bit 3 |
| Pin 5 | VDD — Supply voltage (3.3V typical) |
| Pin 6 | VSS — Ground |
| Pin 7 | PTE4 — Port E bit 4 |
| Pin 8 | PTE5 — Port E bit 5 |
| Pin 9 | PTE6 — Port E bit 6 |
| Pin 10 | PTE7 — Port E bit 7 |
| Pin 11 | PTF0 — Port F bit 0 |
| Pin 12 | PTF1 — Port F bit 1 |
| Pin 13 | PTF2 — Port F bit 2 |
| Pin 14 | PTF3 — Port F bit 3 |
| Pin 15 | PTF4 — Port F bit 4 |
| Pin 16 | PTF5 — Port F bit 5 |
| Pin 17 | PTF6 — Port F bit 6 |
| Pin 18 | PTF7 — Port F bit 7 |
| Pin 19 | PTG0 — Port G bit 0 |
| Pin 20 | PTG1 — Port G bit 1 |
| Pin 21 | PTG2 — Port G bit 2 |
| Pin 22 | PTG3 — Port G bit 3 |
| Pin 23 | PTH0 — Port H bit 0 |
| Pin 24 | PTH1 — Port H bit 1 |
| Pin 25 | PTH2 — Port H bit 2 |
| Pin 26 | PTH3 — Port H bit 3 |
| Pin 27 | PTH4 — Port H bit 4 |
| Pin 28 | PTH5 — Port H bit 5 |
| Pin 29 | PTH6 — Port H bit 6 |
| Pin 30 | PTH7 — Port H bit 7 |
| Pin 31 | PTI0 — Port I bit 0 |
| Pin 32 | PTI1 — Port I bit 1 |
| Pin 33 | PTI2 — Port I bit 2 |
| Pin 34 | PTI3 — Port I bit 3 |
| Pin 35 | PTI4 — Port I bit 4 |
| Pin 36 | PTI5 — Port I bit 5 |
| Pin 37 | PTI6 — Port I bit 6 |
| Pin 38 | PTI7 — Port I bit 7 |
| Pin 39 | USB_DP — USB D+ data line |
| Pin 40 | USB_DM — USB D- data line |
| Pin 41 | VDD_USB — USB transceiver supply (3.3V) |
| Pin 42 | VSS_USB — USB transceiver ground |
| Pin 43 | PTA0 — Port A bit 0 |
| Pin 44 | PTA1 — Port A bit 1 |
| Pin 45 | PTA2 — Port A bit 2 |
| Pin 46 | PTA3 — Port A bit 3 |
| Pin 47 | PTA4 — Port A bit 4 |
| Pin 48 | PTA5 — Port A bit 5 |
| Pin 49 | PTA6 — Port A bit 6 |
| Pin 50 | PTA7 — Port A bit 7 |
| Pin 51 | PTB0/AD0 — Port B bit 0 / ADC channel 0 |
| Pin 52 | PTB1/AD1 — Port B bit 1 / ADC channel 1 |
| Pin 53 | PTB2/AD2 — Port B bit 2 / ADC channel 2 |
| Pin 54 | PTB3/AD3 — Port B bit 3 / ADC channel 3 |
| Pin 55 | PTB4/AD4 — Port B bit 4 / ADC channel 4 |
| Pin 56 | PTB5/AD5 — Port B bit 5 / ADC channel 5 |
| Pin 57 | PTB6/AD6 — Port B bit 6 / ADC channel 6 |
| Pin 58 | PTB7/AD7 — Port B bit 7 / ADC channel 7 |
| Pin 59 | PTC0/AD8 — Port C bit 0 / ADC channel 8 |
| Pin 60 | PTC1/AD9 — Port C bit 1 / ADC channel 9 |
| Pin 61 | PTC2/AD10 — Port C bit 2 / ADC channel 10 |
| Pin 62 | PTC3/AD11 — Port C bit 3 / ADC channel 11 |
| Pin 63 | PTC4/AD12 — Port C bit 4 / ADC channel 12 |
| Pin 64 | PTC5/AD13 — Port C bit 5 / ADC channel 13 |
| Pin 65 | PTC6/AD14 — Port C bit 6 / ADC channel 14 |
| Pin 66 | PTC7/AD15 — Port C bit 7 / ADC channel 15 |
| Pin 67 | PTD0/AD16/DAC0 — Port D bit 0 / ADC channel 16 / DAC output |
| Pin 68 | PTD1/AD17/DAC1 — Port D bit 1 / ADC channel 17 / DAC output |
| Pin 69 | PTD2/AD18 — Port D bit 2 / ADC channel 18 |
| Pin 70 | PTD3/AD19 — Port D bit 3 / ADC channel 19 |
| Pin 71 | PTD4 — Port D bit 4 |
| Pin 72 | PTD5 — Port D bit 5 |
| Pin 73 | PTD6 — Port D bit 6 |
| Pin 74 | PTD7 — Port D bit 7 |
| Pin 75 | RESET — External reset input (active low) |
| Pin 76 | TCLK/PTA7 — Debug clock / PTA7 alternate |
| Pin 77 | TDI/PTA1 — JTAG TDI / PTA1 alternate |
| Pin 78 | TDO/PTA2 — JTAG TDO / PTA2 alternate |
| Pin 79 | TMS/PTA3 — JTAG TMS / PTA3 alternate |
| Pin 80 | TRST/PTA4 — JTAG TRST / PTA4 alternate |
Typical Applications
MCF51JE256CLK is suitable for 6 applications: Industrial Metering and Data Loggers, USB HID Peripherals and Human Interface Devices, Smart Sensor Hubs and Sensor Aggregators, Medical Monitoring Point-of-Care Devices, Low-Power Portable Instrumentation, Building Automation and HVAC Controllers.
Industrial Metering and Data Loggers
The MCF51JE256CLK is well-suited for industrial metering and data-logger designs, where 256KB Flash supports complex tariff/calibration tables, and the 12-bit SAR ADC with up to 20 channels handles multi-phase voltage and current sensing directly. Its integrated USB 2.0 Full-Speed OTG with on-chip PHY eliminates external interface ICs and enables field firmware updates via USB mass storage without additional components. The ColdFire V1 core at 50MHz executes metering algorithms with deterministic response, while low-power Wait and Stop states allow sleep-mode current below typical battery-discharge thresholds. Across the 2.7V to 5.5V supply range, the MCU runs directly from 3.6V lithium thionyl chloride cells common in sealed utility meters, simplifying the analog front-end power tree.
Recommended
USB HID Peripherals and Human Interface Devices
The integrated USB 2.0 Full-Speed OTG controller with on-chip PHY allows the MCF51JE256CLK to implement HID-class devices such as keyboards, pointing devices, custom controls, and barcode scanners without external transceivers. The 50MHz ColdFire V1 core processes HID report descriptors and debounce logic with sub-frame latency, while 32KB of RAM comfortably holds USB stack plus application buffers. 256KB Flash supports rich USB descriptor sets and vendor-specific command handling. Operating from 2.7V to 5.5V covers both bus-powered 5V USB rails and 3.3V regulated internal supplies, simplifying single-PCB HID designs.
Recommended
Smart Sensor Hubs and Sensor Aggregators
The MCF51JE256CLK is well matched to multi-sensor aggregation nodes thanks to its 12-bit SAR ADC with up to 20 channels, 12-bit DAC for excitation signals, and multiple serial interfaces (I2C, SPI, dual UART) for connecting external digital sensors. The 50MHz ColdFire V1 core runs sensor-fusion filters with deterministic latency, and 256KB Flash supports BLE/Zigbee stack overlays or vendor-specific driver libraries. Wide 2.7V-5.5V supply operation enables direct connection to 3.6V lithium or 5V regulated rails in distributed sensor systems, while low-power modes extend battery life in wireless environmental nodes.
Recommended
Medical Monitoring Point-of-Care Devices
The MCF51JE256CLK fits point-of-care medical monitoring instruments where high-resolution analog front-end and USB data transfer are both required in a single device. Its 12-bit ADC and DAC support pulse-oximeter and blood-glucose-meter signal chains, while the integrated USB 2.0 OTG enables direct connection to host software for result logging. The ColdFire V1 deterministic interrupt response is critical for real-time waveform sampling, and 256KB Flash accommodates application firmware plus calibration constants. Low-power modes extend battery life in portable diagnostic tools, and the 80-LQFP package suits compact handheld form factors.
Recommended
Low-Power Portable Instrumentation
The MCF51JE256CLK suits battery-powered portable test and measurement instruments, where its integrated 12-bit ADC, USB for charging/data transfer, and ColdFire V1 deterministic core combine in a single chip. The 2.7V to 5.5V supply range accepts single-cell Li-ion and two-AA battery configurations directly, simplifying power-tree design. Multiple low-power modes (Wait, Stop, Standby) drop quiescent current to microamp levels between measurements, and 256KB Flash supports full measurement firmware plus USB stack. The 80-LQFP package fits compact handheld enclosures with adequate thermal headroom for the 50MHz operating frequency.
Recommended
Building Automation and HVAC Controllers
The MCF51JE256CLK fits building automation controllers that require USB commissioning ports plus analog sensor inputs for temperature, humidity, and air-quality measurements. Its 12-bit SAR ADC and DAC support thermistor bridges and analog actuator outputs, while the integrated USB OTG enables field technicians to load configuration profiles via USB flash drives. ColdFire V1 deterministic interrupt handling is well-suited to HVAC control loops, and the 80-LQFP package allows compact controller PCBs that fit standard electrical boxes. Wide operating voltage from 2.7V to 5.5V accommodates 24VAC-derived DC rails commonly used in building control systems.
Recommended
Recommended Products Summary
Engineering reference data for MCF51JE256CLK — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MCF51JE128VLK | MCF51JE256CMB | MCF51AG96CLK | MCF51MM128VLK |
|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | 80-LQFP (12x12 mm) | 80-LQFP (12x12 mm) - same | 81-MAPBGA - different package | 80-LQFP (12x12 mm) - same | 80-LQFP (12x12 mm) - same |
| Core | ColdFire V1 32-bit | ColdFire V1 32-bit | ColdFire V1 32-bit | ColdFire V1 32-bit | ColdFire V1 32-bit |
| Core Frequency | 50 MHz | 50 MHz | 50 MHz | 50 MHz | 50 MHz |
| Flash | 256 KB | 128 KB (-50%) | 256 KB | 96 KB (-62%) | 128 KB (-50%) |
| RAM | 32 KB | 32 KB | 32 KB | 16 KB (-50%) | 16 KB (-50%) |
| USB | USB 2.0 Full-Speed OTG with PHY | USB 2.0 Full-Speed OTG with PHY | USB 2.0 Full-Speed OTG with PHY | No USB | No USB |
| ADC | 12-bit SAR, 20 ch | 12-bit SAR, 20 ch | 12-bit SAR, 20 ch | 12-bit SAR, fewer ch | 12-bit SAR, 16 ch |
Key Differentiators
- Integrated USB 2.0 Full-Speed OTG PHY (vs MCF51MM128VLK)
- Largest Flash in the JE family at 256KB (vs MCF51JE128VLK)
- Higher ADC channel count with integrated 12-bit DAC (vs MCF51AG96CLK)
Design Notes
Decouple each VDD/VSS pair with 100nF ceramic plus 4.7uF bulk close to the IC. The USB analog supply (VDD_USB) requires a dedicated ferrite bead or filter from VDD to keep digital switching noise out of the USB transceiver. Tie unused VDD pins to the same rail as used pins; leaving them floating can cause latch-up. The integrated USB PHY draws about 10 mA during active USB transmission, so size the 3.3V regulator for at least 50 mA total MCU load including USB.
Route the USB D+ and D- traces as a 90-ohm differential pair, length-matched within 2 mm, and keep them short (under 50 mm). Place the ESD protection array within 5 mm of the USB connector. Avoid running digital switching signals across the USB differential traces. The 80-LQFP exposed pad (if present in your variant) should be soldered to a continuous ground plane to provide thermal relief and reduce ground bounce.
Do not assume pin-compatible substitution across ColdFire families: the JE, AG, and MM families share the 80-LQFP outline but differ in peripheral pin assignments (USB pins, ADC channels, and DAC outputs). Verify the pin map against your schematic before swapping. Last-Time-Buy status means production has stopped - place lifetime-buy orders before inventory is exhausted, or migrate to an active MCU. The 50MHz ColdFire V1 core is not bus-compatible with ColdFire V2/V3/V4 devices, so porting firmware requires recompilation against the new core headers.
Compliance Information
RoHS and lead-free per NXP product page. Not AEC-Q100 qualified; choose VML/Q variants for automotive-grade applications.