NXP Semiconductors MCF51JF64VHS

Overview

MCF51JF64VHS from NXP Semiconductors (formerly Freescale) is a 32-bit ColdFire V1 microcontroller with 64 KB flash, 44-pin Laminate QFN (5 mm × 5 mm), operating from 1.71 V to 3.6 V across –40°C to 105°C. It integrates USB On-The-Go, 12-bit ADC/DAC, hardware cryptographic acceleration (CAU), and 10 low-power modes - deployed in industrial motor control, smart metering, and battery-powered HMI systems.

For engineers reviewing the MCF51JF64VHS datasheet, MCF51JF64VHS pinout, MCF51JF64VHS application, or MCF51JF64VHS equivalent, key selection considerations include its 50 MHz V1 ColdFire core performance (0.99 DMIPS/MHz from flash), FlexNVM/FlexRAM memory architecture, integrated LLWU wakeup unit, and support for EzPort serial programming and Mini-FlexBus external interface.

Technical Context

The MCF51JF64VHS implements a ColdFire V1 CPU core with Dhrystone 2.1 benchmarked at 0.99 DMIPS/MHz when executing from flash memory and 1.10 DMIPS/MHz from internal RAM. Its multipurpose clock generator (MCG) supports three oscillator ranges (1 kHz–32 kHz, 1–8 MHz, 8–32 MHz) and enables dynamic clock mode transitions including VLPR, VLPW, and VLLS stop modes.

System-level integration includes a DMA controller with four channels, hardware CRC module, 128-bit unique chip ID, and security peripherals: RNGB and CAU for AES/DES/SHA acceleration. Analog subsystem comprises 12-bit SAR ADC, 12-bit DAC, analog comparator with 6-bit DAC reference, and voltage reference (VREF) - all sharing common VDDA/VSSA rails with ±0.1 V differential tolerance.

Key Specifications

Pinout & Package

Package: 44-pin Laminate QFN (5 mm × 5 mm), exposed thermal pad, RoHS-compliant, moisture sensitivity level 3 (MSL3).

Key Features

Applications

Equivalent & Alternatives

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

Compared with K22F51212 and MCF51JM128VFP, the MCF51JF64VHS offers optimal balance of USB integration, cryptographic acceleration, and ultra-low-power stop modes in a compact 44-pin QFN - making it ideal for cost-sensitive, battery-constrained industrial endpoints where legacy ColdFire toolchain compatibility is required.

Availability

MCF51JF64VHS is available at Aetrix Electronics and suitable for industrial motor control, smart energy metering, and battery-powered HMI applications requiring stable component supply and long-term lifecycle support.

Supply support for MCF51JF64VHS 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 roots in Freescale's embedded processing heritage.

The MCF51JF64VHS belongs to the ColdFire J-series microcontroller family, designed specifically for cost-optimized, low-power industrial control applications requiring integrated analog, USB, and hardware security without ARM licensing overhead.

FAQ

What is the maximum operating frequency of the MCF51JF64VHS core?

The MCF51JF64VHS features a ColdFire V1 CPU core rated for up to 50 MHz system and core clock frequency in normal run mode. This frequency is achievable across the full –40°C to 105°C temperature range when supplied with 1.71–3.6 V, and is validated for Dhrystone 2.1 performance at 0.99 DMIPS/MHz when executing from flash memory. The MCF51JF64VHS also supports reduced-frequency VLPR mode (up to 2 MHz) for ultra-low-power operation.

Does the MCF51JF64VHS include an integrated USB transceiver?

Yes, the MCF51JF64VHS includes a full/low-speed USB On-The-Go controller with an integrated on-chip transceiver. This eliminates the need for external PHY components and supports both device and host roles. The USB_DP and USB_DM pins are directly routable to the USB connector with only 27 Ω series resistors and a 1.5 kΩ pull-up on DP required for full-speed enumeration. The MCF51JF64VHS USB module complies with USB 2.0 specification and supports CDC, HID, and DFU class drivers.

What low-power modes does the MCF51JF64VHS support, and what is the lowest achievable current draw?

The MCF51JF64VHS supports 10 distinct low-power modes, including VLPR, VLPW, STOP, LLS, and VLLS1–VLLS3. In VLLS3 mode at 3.0 V, the device achieves a typical current draw of 1.8 μA at –40°C to 25°C and 39.2 μA at 105°C. This ultra-low leakage state retains RAM content and enables wake-up via LLWU sources such as GPIO, RTC alarm, or LPTMR timeout - making the MCF51JF64VHS suitable for multi-year battery operation in remote sensor nodes.

How is flash memory organized in the MCF51JF64VHS, and does it support EEPROM emulation?

Flash memory in the MCF51JF64VHS consists of 64 KB main program flash plus dedicated FlexNVM and FlexRAM blocks. FlexNVM enables EEPROM emulation through hardware-supported wear leveling and atomic write operations, allowing reliable non-volatile data storage without external EEPROM. FlexRAM provides fast, byte-addressable non-volatile memory that retains data during power loss and supports rapid logging of critical events - both features are managed by the FTFL flash controller without CPU intervention.

What security features are implemented in hardware on the MCF51JF64VHS?

The MCF51JF64VHS includes three dedicated hardware security modules: a Cryptographic Acceleration Unit (CAU) supporting AES-128/192/256, DES, and SHA-1/256; a Random Number Generator Block (RNGB) compliant with NIST SP800-90A; and a hardware CRC module for fast integrity checking. These peripherals operate independently of the CPU, reducing latency and attack surface. The MCF51JF64VHS also provides a factory-programmed 128-bit unique identification number and supports secure boot via flash protection registers - all verified in the official MCF51JF128 Rev. 7 datasheet.