NXP Semiconductors MCF51JE128CMB

Overview

MCF51JE128CMB from NXP Semiconductors (formerly Freescale) is a 32-bit ColdFire V1 microcontroller featuring a 128 KB Flash memory, 32 KB RAM, and integrated USB On-The-Go controller. It operates up to 50.33 MHz at ≥2.4 V, supports ultra-low-power stop modes with 6 µs wake-up, and includes 12-bit ADC, 12-bit DAC, and programmable analog comparator - deployed in industrial control panels requiring deterministic real-time response and embedded USB host/device connectivity.

For engineers reviewing the MCF51JE128CMB datasheet, MCF51JE128CMB pinout, MCF51JE128CMB application, or MCF51JE128CMB equivalent, key selection criteria include its 80-pin LQFP package, ColdFire ISA_C instruction set, dual-oscillator clock architecture (XOSC1 for TOD, XOSC2 for system/USB), and hardware CRC acceleration for firmware integrity verification.

Technical Context

The MCF51JE128CMB implements the ColdFire V1 CPU core with ISA_C revision, supporting 32-bit MAC operations for digital signal processing tasks. Its Multipurpose Clock Generator (MCG) integrates both PLL and FLL with ±0.5% to –1% frequency deviation over temperature and voltage, enabling precise USB 2.0 timing and stable CPU operation across –40°C to 105°C.

Peripherals are tightly coupled to low-power operation: the Time-of-Day (TOD) counter runs from an ultra-low-power 32.768 kHz external oscillator during stop3 mode; PRACMP and ADC12 remain functional in stop3; and Mini-FlexBus provides configurable external memory expansion with programmable chip selects and address/data multiplexing.

Key Specifications

Pinout & Package

Package: 80-pin LQFP (14 mm × 14 mm), RoHS-compliant, surface-mount.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar microcontroller applications.

Compared with K22FN512VLH12 and MCF51JM128CLK, the MCF51JE128CMB uniquely balances USB OTG integration, ultra-low-power stop3 operation, and FlexBus expandability in an 80-pin LQFP - making it optimal for industrial gateways requiring both legacy bus support and modern USB connectivity.

Availability

MCF51JE128CMB is available at Aetrix Electronics and suitable for industrial HMI panels, USB sensor gateways, and low-power remote I/O modules requiring stable component supply, long-term lifecycle support, and automotive-grade temperature operation (–40°C to 105°C).

Supply support for MCF51JE128CMB includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

NXP Semiconductors acquired Freescale in 2015 and maintains full support for the ColdFire portfolio, delivering high-reliability microcontrollers for industrial, automotive, and IoT applications.

The MCF51JE128CMB belongs to the ColdFire V1 family - designed specifically for cost-sensitive, low-power embedded control applications demanding USB connectivity, analog integration, and robust real-time performance in harsh environments.

FAQ

What is the maximum operating frequency of the MCF51JE128CMB and under what voltage conditions?

The MCF51JE128CMB achieves up to 50.33 MHz when supplied at ≥2.4 V, 40 MHz at ≥2.1 V, and 20 MHz at ≥1.8 V - all across the full industrial temperature range (–40°C to 105°C). These frequency/voltage points are specified in the preliminary electrical characteristics table and validated for continuous operation in the MCF51JE256/128 datasheet Rev. 4.

Does the MCF51JE128CMB support USB device, host, and OTG functionality natively?

Yes, the MCF51JE128CMB integrates a full USB On-The-Go (OTG) controller compliant with USB Specification 2.0, including an on-chip transceiver and 3.3 V regulator. This enables seamless switching between device, host, and OTG roles without external PHY components - confirmed in the "USB" section of the MCF51JE256/128 datasheet.

Can the MCF51JE128CMB operate in ultra-low-power modes while maintaining analog peripheral functionality?

Yes, the MCF51JE128CMB supports stop3 mode with active Time-of-Day (TOD) counter, programmable analog comparator (PRACMP), and 12-bit ADC - all functional during stop3. The 6 µs typical wake-up time allows rapid response to analog events, as documented in the "Power-Saving Modes" section of the MCF51JE256/128 datasheet.

What debug interface does the MCF51JE128CMB provide, and is it compatible with standard tools?

The MCF51JE128CMB features an integrated ColdFire DEBUG_Rev_B+ interface with single-wire Background Debug Mode (BDM), electrically compatible with S08 family debug modules. It supports real-time debugging, 6 hardware breakpoints, and on-chip trace buffer - verified in the "Development Support" section of the MCF51JE256/128 datasheet.

Is the MCF51JE128CMB pin-compatible with other members of the MCF51JE family, such as the MCF51JE256?

No, the MCF51JE128CMB is not pin-compatible with the MCF51JE256. While both share the same 80-pin LQFP footprint, the MCF51JE256 is only offered in 100-, 104-, and 81-pin packages per Table 1 and Figure 3 of the datasheet; the MCF51JE128CMB's 80-pin LQFP variant has distinct pin assignments and peripheral mappings optimized for its 128 KB Flash configuration.