NXP Semiconductors MC56F8257MLHR

Overview

MC56F8257MLHR from NXP Semiconductors (formerly Freescale) is a 60 MHz digital signal controller (DSC) built on the 56800E core, integrating DSP performance with microcontroller flexibility for real-time motor control and power conversion. It features 64 KB flash, 8 KB RAM, dual 12-bit ADCs with 600 ns conversion time, eFlexPWM with 520 ps NanoEdge resolution, and MSCAN 2.0B interface - deployed in BLDC/PMSM motor drives and solar inverters.

For engineers reviewing the MC56F8257MLHR datasheet, MC56F8257MLHR pinout, MC56F8257MLHR application, or MC56F8257MLHR equivalent, key selection criteria include its 64-pin LQFP package, 3.0–3.6 V single supply, –40 °C to +125 °C M-temp grade, and integrated crossbar for flexible peripheral routing between ADC triggers, PWM fault inputs, and timer signals.

Technical Context

The MC56F8257MLHR implements a modified Harvard architecture with three parallel execution units enabling up to six operations per instruction cycle, delivering 60 MIPS at 60 MHz core frequency. Its unified C-efficient instruction set supports both DSP math (single-cycle 16×16 MAC, four 36-bit accumulators) and control logic (hardware DO/REP loops, nested interrupts with five priority levels).

Peripherals are interconnected via a programmable inter-module crossbar (XBAR), allowing dynamic routing of ADC conversion triggers to eFlexPWM fault inputs, timer outputs to comparator references, and QSCI LIN slave wakeup events to COP watchdog reset - all configurable without hardware changes.

Key Specifications

Pinout & Package

MC56F8257MLHR is housed in a 64-pin LQFP package measuring 10 mm × 10 mm with 0.5 mm pitch. The package supports thermal dissipation up to 1.5 W in standard PCB layouts and includes dedicated analog/digital power and ground pins for noise isolation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar digital signal controller applications.

Compared with MC56F8257MLHR, MC56F8272VLH offers greater processing headroom for advanced observer-based control, while dsPIC33EP512MU810 provides broader analog integration and CAN FD - but both require layout changes and firmware rework due to non-pin-compatible packages and distinct peripheral mappings.

Availability

MC56F8257MLHR is available at Aetrix Electronics and suitable for industrial motor drives, solar inverters, and battery management systems requiring stable component supply across extended production lifecycles.

Supply support for MC56F8257MLHR 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, with deep heritage in microcontrollers and digital signal processors.

The MC56F8257MLHR belongs to NXP's 56800E-based DSC product line, designed specifically for cost-sensitive, high-performance real-time control in power electronics - emphasizing motor control, renewable energy conversion, and intelligent power management.

FAQ

What is the maximum operating frequency of the MC56F8257MLHR core?

The MC56F8257MLHR core operates at a maximum frequency of 60 MHz, delivering up to 60 million instructions per second (MIPS). This frequency is sustained across the full –40 °C to +125 °C operating range for M-grade devices. The MC56F8257MLHR achieves this using an internal PLL locked to an external crystal or the on-chip relaxation oscillator, ensuring deterministic timing for real-time control loops without software throttling.

Does the MC56F8257MLHR support CAN communication?

Yes, the MC56F8257MLHR integrates Freescale's scalable Controller Area Network (MSCAN) 2.0B module, supporting both standard and extended data frames at data rates up to 1 Mbps. It includes five receive buffers and three transmit buffers, and is fully compliant with ISO 11898-1. The MC56F8257MLHR uses dedicated CANTX and CANRX pins on its 64-pin LQFP package, requiring only an external CAN transceiver for physical layer interfacing.

How many analog-to-digital converter (ADC) channels does the MC56F8257MLHR have?

The MC56F8257MLHR features two independent 12-bit analog-to-digital converters (ADCs), each supporting up to eight external input channels - totaling 16 ADC inputs. Both ADCs include programmable gain amplifiers (x1/x2/x4), dynamic conversion time as short as 600 ns, and input current-injection protection. These ADCs are synchronized via the internal crossbar to eFlexPWM modules, enabling precise current sampling aligned with inverter switching events.

What package type and dimensions does the MC56F8257MLHR use?

The MC56F8257MLHR is supplied in a 64-pin LQFP package with 10 mm × 10 mm body size and 0.5 mm lead pitch. This package is RoHS-compliant and rated for industrial temperature operation (–40 °C to +125 °C). Pin assignments include dedicated VDDA/VSSA for analog power integrity, separate GPIO banks with 5 V tolerance, and JTAG/EOnCE debug pins compatible with standard ARM Cortex-M debug probes via SWD/JTAG adapters.

Is the MC56F8257MLHR pin-compatible with other members of the MC56F825x family?

Yes, the MC56F8257MLHR shares identical pinout and electrical characteristics with other 64-pin LQFP variants in the MC56F825x family, including MC56F8255 and MC56F8256. All three devices use the same 64-pin LQFP mechanical outline and maintain consistent signal mapping for power, reset, clocks, peripherals, and GPIOs - enabling drop-in replacement where flash/RAM requirements align. However, it is not pin-compatible with 44-pin or 48-pin variants due to differing pin counts and functional allocations.