MCF51JE128CMB - 32-Bit 50MHz MCU, 128KB Flash | NXP
MPN: MCF51JE128CMB ✗ End of Life| Qty | Unit Price | Extended |
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| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
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| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
MCF51JE128CMB Overview
A microcontroller is a semiconductor device that integrates a CPU, memory, peripherals, and input/output interfaces into one compact component. The MCF51JE128 belongs to the ColdFire V1 MCU family and combines a 32-bit processor with embedded flash and application peripherals. In the broader system hierarchy, it belongs to the embedded processor and controller category, connecting a microcontroller core with memory, communications, timing, and measurement resources.
The supplied distributor information identifies the part as a ColdFire V1 device with 128KB flash, a 50MHz maximum clock, and an 81-MAPBGA package. The family description also identifies USB connectivity, ultra-low-power operation, and high measurement accuracy as important device attributes. These characteristics make the MCU suitable for USB-connected control products, compact instrumentation, industrial equipment, and low-power embedded systems where integration and measurement performance matter.
The 32-bit ColdFire V1 CPU provides the computational basis for control logic, communications, and data acquisition. Flash memory supports resident firmware and application code, while the integrated peripherals can reduce the number of external components required in a compact design. The 50MHz operating specification provides a defined performance target for control-loop and communication workloads, although actual application performance depends on firmware, memory configuration, peripherals, and system conditions.
Typical applications include USB peripheral controllers, sensor and measurement systems, compact industrial controllers, and embedded products that require a small package and low-power operation. The 81-MAPBGA package is suitable for space-constrained products but requires careful PCB layout, fine-pitch routing, and controlled assembly. Designers should confirm pin functions, power requirements, clocking, USB connectivity, and peripheral assignments against the manufacturer datasheet before releasing a production layout.
For USB designs, budget for proper power distribution, signal routing, decoupling, and connector integration. For measurement systems, verify the required accuracy, reference sources, analog interfaces, and calibration strategy. Because the supplied data does not provide a complete electrical parameter table or package pin map, use the manufacturer datasheet as the authoritative source for final design decisions.
This product data consolidates distributor listings, family-level technical information, and practical design considerations for engineers evaluating the MCF51JE128CMB. It is intended to support initial component selection while preserving clear separation between verified specifications and parameters that still require datasheet confirmation.
Drop-in alternatives for MCF51JE128CMB — 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 MCF51JE128CMB (same form factor and footprint) — differing in Mounting Type, Supply Voltage, Package, Product Type, Program Memory Size.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MCF51MM128CMB
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View Datasheet →MCF51JE128CMB Maximum Ratings & Electrical Characteristics
| Product Type | 32-bit microcontroller (MCU) |
| CPU Core | ColdFire V1 |
| Maximum Clock Frequency | 50 MHz |
| Flash Memory | 128 KB |
| Flash Organization | 128K x 8 bits |
| Supply Voltage | 2.5 V / 3.3 V |
| Package | 81-MAPBGA |
| Package Dimensions | 10 mm x 10 mm |
| USB Connectivity | Yes |
| Power Operation | Ultra-low-power operation |
| Measurement Capability | High measurement accuracy |
| CPU Architecture | 32-bit |
| Application Category | Embedded control and measurement |
| Manufacturer | NXP Semiconductors |
| Original Brand Reference | Freescale Semiconductor |
| Mounting Type | Surface mount |
| Pin Count | 81 pins |
MCF51JE128CMB 10 mm x 10 mm Pin Configuration Guide
Pin configuration for MCF51JE128CMB (10 mm x 10 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 MCF51JE128CMB.
Refer to the datasheet for full pin configuration.
Typical Applications
MCF51JE128CMB is suitable for 6 applications: USB Peripheral Controller, Low-Power Measurement System, Compact Industrial Controller, Battery-Operated Sensor Node, USB-Enabled Data Logger, Embedded Communications Module.
USB Peripheral Controller
The MCF51JE128CMB is suitable for a compact USB peripheral when the design needs a 32-bit ColdFire V1 control core, up to 50MHz operation, 128KB of resident flash, and USB connectivity in one package. Use the MCU to manage command parsing, device state, data buffering, and application-specific I/O while the USB interface handles host communication. The verified family information supports USB functionality, but the datasheet must confirm the exact USB mode, pin assignments, transceiver arrangement, and electrical requirements. The 81-MAPBGA package also makes compact placement possible, provided the PCB supports the required fine-pitch escape routing and controlled assembly.
Recommended
Low-Power Measurement System
The MCF51JE128CMB fits a low-power measurement product because the MCF51JE family is described as ultra-low-power and provides high measurement accuracy. Its 32-bit ColdFire V1 processor can coordinate sensor acquisition, filtering, calibration, data formatting, and host communication at up to 50MHz. The 128KB flash capacity provides space for embedded control firmware without immediately requiring a separate memory device. Because the verified data does not specify sleep current, analog accuracy, ADC characteristics, reference voltage, or wake-up timing, the design should confirm those values in the manufacturer datasheet and validate the measurement chain with the intended sensors and calibration process.
Recommended
Compact Industrial Controller
The MCF51JE128CMB can serve as the central controller in a compact industrial product that combines digital I/O, communications, and local decision-making. Its 32-bit architecture and 50MHz maximum frequency provide a defined processing target for control state machines, communication protocols, and supervisory logic. The 128KB flash memory supports resident application code, while USB connectivity can simplify service access or host integration. Industrial suitability still depends on environmental ratings, operating-temperature limits, isolation, EMC design, and long-term supply status, none of which are specified in the supplied data. Confirm these requirements before using the part in a safety-related or high-reliability installation.
Recommended
Battery-Operated Sensor Node
The ultra-low-power operation identified for the MCF51JE family makes the MCF51JE128CMB a candidate for battery-operated sensor nodes and portable embedded instruments. The MCU can handle sensor control, sampling coordination, local filtering, data packing, and USB commissioning while using its 128KB flash for firmware. The small 10mm by 10mm 81-MAPBGA package can help reduce board area in space-constrained products. Battery-life calculations require verified standby and active current, wake-up behavior, USB suspend behavior, and analog-system power figures; those values are not present in the supplied data and must be obtained from the datasheet before sizing the battery.
Recommended
USB-Enabled Data Logger
The MCF51JE128CMB is appropriate for a compact data logger that records sensor or system events and transfers them over USB. Its ColdFire V1 processor can organize acquisition tasks, timestamps, event buffering, and configuration commands, while 128KB flash stores the logger application and fixed parameters. The integrated USB feature can reduce the need for a separate interface controller in designs that meet the electrical and firmware requirements. For long-duration logging, evaluate external nonvolatile storage, write endurance, data retention, and connector power requirements. The supplied data does not confirm external-memory interfaces or USB electrical limits, so the manufacturer documentation is required.
Recommended
Embedded Communications Module
The MCF51JE128CMB can support embedded communications products where a local protocol engine, device management, and USB connectivity are needed in a compact controller. The 32-bit ColdFire V1 core and up-to-50MHz clock provide a basis for protocol handling and application logic, while the 128KB flash stores firmware and configuration code. Designers should verify which communications peripherals are available, how USB pins are assigned, and whether external transceivers or level shifters are required. The package supports dense integration, but its 81-ball layout demands careful plane allocation and routing. The part is best considered for compact USB-connected modules rather than high-pin-count gateways until all peripheral and electrical requirements are confirmed.
Recommended
Recommended Products Summary
Engineering reference data for MCF51JE128CMB — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MCF51MM128CMB |
|---|---|---|
| Product Type | 32-bit ColdFire V1 microcontroller | 32-bit microcontroller |
| Flash Memory | 128 KB | 128 KB |
| Architecture | 32-bit | 32-bit |
| Package | 81-MAPBGA (10 mm x 10 mm) | 81-MAPBGA |
| Brand | NXP Semiconductors | Freescale Semiconductor |
Key Differentiators
- ColdFire V1 MCU with USB connectivity (vs MCF51MM128CMB)
- 50 MHz maximum clock (vs MCF51MM128CMB)
- Documented low-power and measurement positioning (vs MCF51MM128CMB)
- Verified package identity (vs MCF51MM128CMB)
Design Notes
Treat the 81-MAPBGA as a fine-pitch layout problem. Use the manufacturer package drawing to confirm ball numbering, pad dimensions, solder-mask and paste recommendations, via-in-pad rules, and the required escape-routing geometry. Reserve space for power and ground distribution before placing signal routes, and validate the assembly process because package density can create thermal and soldering risks.
The verified source lists 2.5V and 3.3V operation, but it does not provide the complete power tree. Establish the required supply rails, sequencing, current limits, and decoupling values from the datasheet before schematic release. Place local high-frequency decoupling close to the MCU supply pins and provide adequate return paths for USB and clocking signals to avoid coupling noise into sensitive measurements.
For USB-connected products, route USB signals as a controlled impedance interface only after confirming the connector, transceiver arrangement, and electrical requirements in the datasheet. Keep noisy switching nodes away from MCU supply and measurement paths, maintain continuous reference planes where appropriate, and review the manufacturer reference layout for the exact package and USB implementation.
Do not treat MCF51MM128CMB as a drop-in substitute based only on the shared 128KB flash description. Verify the complete ball assignment, memory map, peripherals, USB behavior, voltage limits, timing, startup requirements, and software model. A partial family comparison can overlook boot, interrupt, debug, clock, and peripheral differences that prevent a board from starting or operating correctly.
Compliance Information
The supplied distributor and manufacturer-search results do not provide verified RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals statements. Obtain current compliance documentation from NXP before procurement.
