NXP Semiconductors MCF51JU64VHS

Overview

MCF51JU64VHS from NXP Semiconductors (formerly Freescale) is a 32-bit ColdFire V1 microcontroller with 64 KB flash, 44-pin Laminate QFN (5 mm × 5 mm) package, operating at up to 50 MHz, supporting -40°C to 105°C ambient temperature and 1.71–3.6 V supply voltage. It integrates USB OTG, 12-bit ADC/DAC, FlexNVM, and low-power timers for industrial control and embedded HMI applications.

For engineers reviewing the MCF51JU64VHS datasheet, MCF51JU64VHS pinout, MCF51JU64VHS application, or MCF51JU64VHS equivalent, key selection criteria include its 50 MHz ColdFire core performance (0.99 DMIPS/MHz from flash), 10 low-power modes, integrated USB transceiver, 48 EGPIO pins, and support for EzPort serial programming and Mini-FlexBus external memory expansion.

Technical Context

The MCF51JU64VHS implements the ColdFire V1 CPU core with Harvard architecture, executing instructions from on-chip flash or RAM. Its system-level integration includes a multipurpose clock generator (MCG) supporting multiple oscillator inputs (1 kHz–32 MHz), a DMA controller with four channels, and an integrated BDM debug interface using single-wire connection.

Power management is handled via a voltage regulator (VREG), low-leakage wakeup unit (LLWU), and ten configurable low-power modes-including VLLS1–VLLS3-enabling sub-μA stop-mode current (1.4–2.6 μA at –40°C to 25°C). Analog subsystems include a 12-bit SAR ADC with programmable reference, 12-bit DAC, analog comparator with internal 6-bit DAC, and hardware CRC module for data integrity.

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 MCF51JU64VHS offers optimal balance of USB integration, ultra-low-power stop modes, and compact QFN packaging - making it preferred for cost-sensitive, space-constrained, and battery-operated industrial controllers where ColdFire toolchain compatibility is maintained.

Availability

MCF51JU64VHS is available at Aetrix Electronics and suitable for industrial motor control, smart energy metering, medical portable devices, and automotive body electronics requiring stable component supply across extended product lifecycles.

Supply support for MCF51JU64VHS 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, IoT, and mobile applications.

The MCF51JU64VHS belongs to the ColdFire V1 microcontroller family, designed specifically for cost-optimized, low-power embedded control applications demanding real-time responsiveness, analog integration, and long-term supply stability in harsh environments.

FAQ

What is the maximum operating frequency of the MCF51JU64VHS?

The MCF51JU64VHS supports a maximum system and core clock frequency of 50 MHz in normal run mode. This is achieved using the multipurpose clock generator (MCG) in FEI or FBE mode with appropriate crystal or internal reference. In very low-power run (VLPR) mode, the maximum core clock is reduced to 2 MHz to minimize active power consumption while retaining peripheral functionality.

Does the MCF51JU64VHS include an integrated USB transceiver?

Yes, the MCF51JU64VHS includes a full/low-speed USB On-The-Go controller with an integrated on-chip transceiver. This eliminates the need for external USB PHY components and supports both host and device roles. The USB_DP and USB_DM pins are directly routed to the internal transceiver, enabling plug-and-play connectivity in applications such as firmware updates, data logging, and diagnostic interfaces.

What low-power modes does the MCF51JU64VHS support, and what is the lowest current draw?

The MCF51JU64VHS supports 10 low-power modes, including VLLS1–VLLS3. In VLLS3 mode at 3.0 V and –40°C to 25°C ambient, the typical current draw is 1.8 μA, with a maximum of 3.3 μA. This mode retains RAM content and allows wake-up via LLWU sources such as GPIO, RTC alarm, or ADC comparison events - making it ideal for battery-backed applications requiring multi-year standby operation.

How much flash memory does the MCF51JU64VHS have, and is it configurable?

The MCF51JU64VHS has 64 KB of program flash memory and includes FlexNVM - a separate block of embedded non-volatile memory that can be configured either as additional program flash or as EEPROM emulation. This flexibility enables robust firmware update mechanisms, secure key storage, and wear-leveling for data logging without requiring external memory chips.

What analog peripherals are integrated into the MCF51JU64VHS?

The MCF51JU64VHS integrates a 12-bit SAR ADC with up to 16 input channels, a 12-bit DAC, an analog comparator with internal 6-bit DAC and programmable reference input, and a dedicated voltage reference (VREF) module. These peripherals support precision sensor signal acquisition, actuator control, and analog threshold detection - all without external signal-conditioning components.

Is the MCF51JU64VHS pin-compatible with other members of the MCF51JU family?

No, the MCF51JU64VHS is not pin-compatible with other MCF51JU variants due to differing package types and pin counts: MCF51JU64VHS uses a 44-pin Laminate QFN, while MCF51JU128VLH uses a 64-pin LQFP and MCF51JU32VFM uses a 32-pin QFN. Although peripheral functionality and register mapping are consistent across the family, PCB layout must be redesigned for each package variant.