NXP Semiconductors MCF51JF32VHS

Overview

MCF51JF32VHS from NXP Semiconductors (formerly Freescale) is a 32-bit ColdFire V1 microcontroller with 32 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 ambient. It integrates USB OTG, 12-bit ADC/DAC, hardware cryptographic acceleration (CAU), and 10 low-power modes - deployed in industrial sensor nodes and secure embedded control systems.

For engineers reviewing the MCF51JF32VHS datasheet, MCF51JF32VHS pinout, MCF51JF32VHS application, or MCF51JF32VHS equivalent, key selection criteria include its 50 MHz V1 ColdFire core performance (0.99 DMIPS/MHz from flash), integrated LLWU wakeup unit, FlexNVM/FlexRAM memory architecture, and USB full/low-speed transceiver with on-chip PHY.

Technical Context

The MCF51JF32VHS implements a ColdFire V1 CPU core with Harvard-style instruction/data bus, supporting up to 50 MHz operation and Dhrystone 2.1 benchmarking at 0.99 DMIPS/MHz when executing from flash. Its system-level architecture includes a multipurpose clock generator (MCG) with three crystal oscillator ranges (1 kHz–32 MHz), Mini-FlexBus external interface, and EzPort serial programming.

Power management is centered on 10 configurable low-power modes including VLLS1–VLLS3, enabled by a low-leakage wakeup unit (LLWU) and voltage regulator (VREG). Peripheral integration includes dual UARTs with FIFO and Smart Card support, I²C, SPI, I²S/SAI audio interface, and a programmable delay block (PDB) for motor control timing synchronization.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with K22F51212VLH and MCF51JM32VHS, the MCF51JF32VHS uniquely balances USB PHY integration, hardware cryptographic acceleration, and ultra-low-power stop modes - making it optimal for secure, battery-operated USB-peripheral designs where minimizing component count and leakage current is essential.

Availability

MCF51JF32VHS is available at Aetrix Electronics and suitable for industrial sensor nodes, secure firmware gateways, motor control modules, and human-machine interface terminals requiring stable component supply and long-term lifecycle support.

Supply support for MCF51JF32VHS 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 applications.

The MCF51JF32VHS belongs to the ColdFire V1 microcontroller family, designed specifically for cost-sensitive, low-power embedded control applications demanding integrated USB, analog peripherals, and hardware security - targeting industrial automation and smart sensor markets.

FAQ

What is the maximum operating frequency of the MCF51JF32VHS core?

The MCF51JF32VHS features a ColdFire V1 CPU core rated for up to 50 MHz operation. This frequency is achievable under specified conditions: VDD = 1.71–3.6 V, ambient temperature –40°C to +105°C, and proper clock configuration using the multipurpose clock generator (MCG). At 50 MHz, the device delivers 0.99 DMIPS/MHz when executing from flash memory, as confirmed in the official MCF51JF128 datasheet Rev. 7.

Does the MCF51JF32VHS include an integrated USB physical layer?

Yes, the MCF51JF32VHS includes a full/low-speed USB On-The-Go controller with an integrated transceiver - eliminating the need for an external USB PHY. The USB_DP and USB_DM pins connect directly to the USB connector with only required series resistors (27 Ω) and a 1.5 kΩ pull-up on DP. This integration is explicitly documented in the "Communication interfaces" section of the MCF51JF128 datasheet and applies to all members of the MCF51JF family, including the MCF51JF32VHS.

What low-power modes are supported by the MCF51JF32VHS, and what is the lowest current draw?

The MCF51JF32VHS supports 10 low-power modes, including VLLS1, VLLS2, and VLLS3. In VLLS3 mode at 3.0 V and –40°C to +25°C ambient, the typical current draw is 1.8 μA. At 105°C, it rises to 3.3 μA. These values are measured with all pads disabled and OSC clocks off, as specified in Table 5 of the MCF51JF128 datasheet Rev. 7. The low-leakage wakeup unit (LLWU) enables reliable wake-up from these states using external pins or internal modules.

Is the MCF51JF32VHS pin-compatible with other members of the MCF51JF family?

Yes, the MCF51JF32VHS in the 44-pin Laminate QFN (HS) package shares identical pinout and package dimensions with MCF51JF64VHS and MCF51JF128VHS. This is confirmed by the "Pinout diagrams" section (Section 8.2) and "Signal Multiplexing and Pin Assignments" (Section 8.1) in the MCF51JF128 datasheet Rev. 7, which explicitly lists all HS-package variants - including MCF51JF32VHS - under the same pin assignment table and mechanical drawing.

What memory resources are available on the MCF51JF32VHS besides the 32 KB flash?

In addition to 32 KB of program flash memory, the MCF51JF32VHS includes FlexNVM (configurable as EEPROM emulation or additional flash), FlexRAM (for data logging or stack extension), and dedicated RAM. The exact RAM size is not specified in the provided excerpt, but the datasheet confirms all MCF51JF family members - including MCF51JF32VHS - implement this multi-tier memory architecture. FlexNVM enables wear-leveling for robust nonvolatile parameter storage without external EEPROM.