NXP Semiconductors MCF51JE256CLK

Overview

MCF51JE256CLK from NXP Semiconductors (formerly Freescale) is a 32-bit ColdFire V1 microcontroller featuring a 50.33 MHz CPU, 256 KB flash, 32 KB RAM, USB OTG, dual 4-channel TPMs, 12-bit ADC with 12 SE inputs, and 12-bit DAC - deployed in industrial control panels requiring deterministic real-time response, low-power operation, and integrated analog I/O.

For engineers reviewing the MCF51JE256CLK datasheet, MCF51JE256CLK pinout, MCF51JE256CLK application, or MCF51JE256CLK equivalent, this page delivers verified package mapping (100-pin LQFP), confirmed ColdFire ISA_C instruction set support, validated USB 2.0 OTG transceiver integration, precise MCG PLL/FLL clock generation up to 50 MHz, and documented stop3-mode wake-up timing of 6 µs - all critical for embedded firmware development and hardware layout validation.

Technical Context

The MCF51JE256CLK implements the ColdFire V1 CPU core with ISA_C revision, supporting 32-bit MAC operations on signed/unsigned integer or fractional data. Its Multipurpose Clock Generator (MCG) integrates both PLL and FLL modes with internal reference trimming enabling ±0.5% to –1% deviation across –40°C to 105°C and full operating voltage range.

On-chip peripherals include dual SPI interfaces (SPI1 with 32-bit FIFO, SPI2 without), two SCIs with high-current TX drivers and stop3 wake-up capability, I²C at up to 100 kbps, and a Programmable Delay Block (PDB) with 8 trigger outputs synchronized to ADC sampling sequences - enabling precise timing coordination in sensor acquisition systems.

Key Specifications

Pinout & Package

Package: 100-pin LQFP (14 mm × 14 mm), RoHS-compliant, with exposed thermal pad per Freescale Document Number MCF51JE256 Rev. 4.

Key Features

Applications

Equivalent & Alternatives

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

Compared with K22FN512VLH12, MCF51JE256CLK offers native IR transmission and lower-power USB OTG at the expense of ARM ecosystem compatibility; compared with MCF51JM128CLK, it doubles flash capacity and adds four GPIOs - essential for complex HMI or multi-sensor systems requiring local firmware storage and expansion.

Availability

MCF51JE256CLK is available at Aetrix Electronics and suitable for industrial HMI panels, portable medical monitors, smart energy meters, and IR-controlled HVAC systems requiring stable component supply, long-term lifecycle support, and consistent parametric performance across temperature ranges.

Supply support for MCF51JE256CLK 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 continues to support ColdFire-based microcontrollers for legacy industrial and automotive applications requiring deterministic real-time behavior and long product lifecycles.

The MCF51JE256CLK belongs to the ColdFire V1 MCU family designed specifically for cost-sensitive, low-power embedded systems needing integrated analog peripherals (ADC/DAC/PRACMP), USB connectivity, and robust power management - targeting industrial control, medical instrumentation, and consumer appliance markets.

FAQ

What is the maximum operating frequency of the MCF51JE256CLK under 2.4 V supply?

The MCF51JE256CLK achieves a maximum CPU frequency of 50.33 MHz when operating above 2.4 V across the full temperature range of –40°C to 105°C. This rating is specified in Freescale Document Number MCF51JE256 Rev. 4, Section 3.5 (DC Characteristics). The MCF51JE256CLK maintains deterministic timing at this speed with full peripheral functionality enabled, including USB OTG and ADC conversion.

Does the MCF51JE256CLK support USB device, host, and OTG modes simultaneously?

Yes, the MCF51JE256CLK implements a true dual-role USB On-The-Go (OTG) controller compliant with USB Specification 2.0. It supports device, host, and OTG configurations dynamically through software control - no hardware reconfiguration is needed. The MCF51JE256CLK integrates its own transceiver and 3.3 V regulator, eliminating external components required for USB functionality.

Can the MCF51JE256CLK operate its ADC and PRACMP in ultra-low-power stop3 mode?

Yes, both the 12-bit ADC and PRACMP analog comparator are fully functional in stop3 mode, as confirmed in the "Power-Saving Modes" section of the MCF51JE256CLK datasheet. This enables continuous low-power sensor monitoring - for example, battery voltage supervision via PRACMP or periodic temperature sampling via ADC - with typical wake-up time of 6 µs from stop3.

What clock sources does the MCF51JE256CLK's Multipurpose Clock Generator (MCG) support?

The MCF51JE256CLK MCG supports three primary clock sources: an external 32.768 kHz crystal/resonator on XOSC1 (for Time-of-Day), a high-frequency crystal on XOSC2 (for system clock and USB), and an internal reference oscillator. The MCG combines PLL and FLL modes with precision trimming, achieving ±0.5% to –1% deviation over voltage and temperature - critical for stable USB and real-time operation in the MCF51JE256CLK.

Is the MCF51JE256CLK pin-compatible with other members of the MCF51JE family?

The MCF51JE256CLK is pin-compatible with the MCF51JM128CLK in the 100-pin LQFP package, sharing identical pin assignments for power, ground, debug, USB, ADC, DAC, and peripheral interfaces. However, it is not pin-compatible with 80-pin or 81-pin variants due to differing pin counts and missing signals such as FB_AD17 or FB_AD0 in smaller packages - board layout must match the 100-LQFP footprint for the MCF51JE256CLK.