NXP Semiconductors MCF51JM128VLK

Overview

MCF51JM128VLK from NXP Semiconductors (formerly Freescale) is a 32-bit ColdFire V1 microcontroller designed for industrial control and embedded connectivity applications. It integrates 128 KB flash, 16 KB SRAM, USB OTG, CAN 2.0B, cryptographic acceleration (CAU), RNGA, 12-bit ADC with 12 channels, and dual I²C/SPI/SCI peripherals. It operates up to 50.33 MHz across –40°C to +105°C in an 80-pin LQFP package.

For engineers reviewing the MCF51JM128VLK datasheet, MCF51JM128VLK pinout, MCF51JM128VLK application, or MCF51JM128VLK equivalent, key selection criteria include its USB OTG + CAN dual-protocol capability, CAU/RNGA security acceleration, 80-pin LQFP thermal robustness, and direct upgrade path from MC9S08JM60-based 8-bit designs.

Technical Context

The MCF51JM128VLK implements the ColdFire V1 core (ISA_C) with background debug module (BDM), delivering 0.76 Dhrystone MIPS/MHz from flash. Its multipurpose clock generator (MCG) supports FLL/PLL operation with internal reference trimming (0.2% resolution), enabling flexible clock synthesis from crystal (1–16 MHz) or low-frequency oscillator (31.25 kHz–38.4 kHz) sources.

System-level integration includes MSCAN with five receive buffers and three prioritized transmit buffers, USB OTG with on-chip transceiver and 3.3 V regulator, and rapid GPIO (16-bit) connected directly to the local 32-bit platform bus for sub-cycle I/O toggling-critical for real-time sensor and actuator control loops.

Key Specifications

Pinout & Package

Package: 80-pin LQFP (14 mm × 14 mm), RoHS-compliant, rated for –40°C to +105°C ambient operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with K22FN512VLH12 and MCF52259CAG80, the MCF51JM128VLK offers optimal balance of CAN+USB OTG integration, hardware security acceleration (CAU/RNGA), and thermal ruggedness in 80-pin LQFP - making it uniquely suited for cost-sensitive, safety-critical industrial nodes where protocol coexistence and cryptographic integrity are mandatory.

Availability

MCF51JM128VLK is available at Aetrix Electronics and suitable for industrial motor control, automotive body electronics, and secure IoT edge node designs requiring stable component supply, long-term lifecycle support, and guaranteed RoHS compliance.

Supply support for MCF51JM128VLK 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 is a global semiconductor leader focused on secure connectivity solutions for automotive, industrial, and IoT markets, with deep heritage in microcontroller innovation through its acquisition of Freescale.

The MCF51JM128VLK belongs to the ColdFire V1 microcontroller product line, engineered specifically for seamless migration from 8-bit S08 platforms to 32-bit performance while retaining design familiarity, toolchain compatibility, and industrial-grade reliability.

FAQ

What is the maximum operating frequency of the MCF51JM128VLK?

The MCF51JM128VLK operates at a maximum core frequency of 50.33 MHz across its full voltage range (2.7 V to 5.5 V) and temperature range (–40°C to +105°C). This frequency is achieved using the multipurpose clock generator (MCG) in PLL mode with an external crystal reference. The V1 ColdFire core delivers 0.76 Dhrystone 2.1 MIPS per MHz when executing from flash memory, enabling deterministic real-time control in applications such as motor drives and protocol stacks.

Does the MCF51JM128VLK include hardware cryptographic acceleration?

Yes, the MCF51JM128VLK includes a Cryptographic Acceleration Unit (CAU) that offloads DES, 3DES, AES, MD5, and SHA-1 operations from the CPU, and a Random Number Generator Accelerator (RNGA) compliant with FIPS-140. These units are present in the MCF51JM128VLK variant - confirmed by Freescale's orderable part number table, which lists both CAU and RNGA as enabled features for the VLK package. This enables secure boot, encrypted communications, and tamper-resistant key generation without consuming CPU cycles.

What USB capabilities does the MCF51JM128VLK support?

The MCF51JM128VLK integrates a full-speed USB On-The-Go (OTG) dual-role controller compliant with USB 1.1 and 2.0 specifications. It supports 16 bidirectional endpoints with double buffering, control/bulk/interrupt/isochronous transfers, and includes an on-chip transceiver and 3.3 V voltage regulator. This eliminates the need for external USB PHY or LDO components. The MCF51JM128VLK can operate as a USB device, host, or OTG node - enabling field service tools to configure devices or upload firmware via standard USB cables.

How many analog-to-digital converter (ADC) channels does the MCF51JM128VLK have?

The MCF51JM128VLK features a 12-bit analog-to-digital converter with up to 12 input channels (ADP0–ADP11), as specified in Table 1 of the datasheet and confirmed in the block diagram and pin assignment tables. The ADC supports single or continuous conversion modes, asynchronous hardware triggering, and operation in Stop3 low-power mode. It also includes an internal temperature sensor and automatic compare function - making it suitable for precision sensor monitoring in industrial and medical applications.

Is the MCF51JM128VLK pin-compatible with other members of the MCF51JM family?

No, the MCF51JM128VLK is not pin-compatible with other MCF51JM variants across different packages. While the 80-pin LQFP (VLK) shares functional pin definitions with the 64-pin LQFP (VLH) and 44-pin LQFP (VLD) versions, the physical pin count and layout differ significantly. Pin assignments in Table 4 confirm that only pins 1–64 appear in both VLK and VLH packages, but VLK adds 16 additional pins (65–80) for expanded I/O, including PTJ0–PTJ4, PTD3–PTD7, PTG6–PTG7, and extra VDD/VSS. PCB layout must be specific to the 80-pin LQFP footprint.