NXP Semiconductors MC56F81766MLF

Overview

MC56F81766MLF from NXP Semiconductors is a 32-bit digital signal controller (DSC) based on the 56800EX core, operating at up to 100 MHz in fast mode. It integrates 128 KB flash, 20 KB RAM, dual 12-bit ADCs with x4 programmable gain amplifiers, and an eFlexPWM module with 312 ps NanoEdge resolution. Designed for industrial motor control and solar inverters, it supports real-time closed-loop control with hardware-accelerated DSP math.

For engineers reviewing the MC56F81766MLF datasheet, MC56F81766MLF pinout, MC56F81766MLF application, or MC56F81766MLF equivalent, key selection criteria include its M-grade temperature range (–40°C to 125°C), 64-pin LQFP package, dual QSCI with LIN slave support, and integrated CRC generator for functional safety compliance.

Technical Context

The MC56F81766MLF implements the 56800EX core with modified dual-Harvard architecture, supporting concurrent instruction fetches and dual data accesses per cycle. Its unified DSP/MCU architecture delivers single-cycle 32×32→64-bit MAC operations and full shadow register stack for zero-overhead context switching during interrupts.

Peripheral integration centers on deterministic real-time control: the eFlexPWM submodule enables synchronized, high-resolution PWM generation with independent deadtime and edge placement per channel, while the inter-module crossbar routes ADC triggers, comparator events, and timer outputs directly to PWM reload logic without CPU intervention.

Key Specifications

Pinout & Package

MC56F81766MLF is housed in a 64-pin LQFP package (10 × 10 mm, 0.5 mm pitch) with exposed thermal pad. Pin functions are multiplexed via GPIOx_PER and SIM GPSx registers; all pins default to GPIO input after reset except JTAG and RESET_B.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC56F81766MLF, MC56F81768MLF adds QSPI at the expense of one GPIO, while TMS320F280049CPTT trades integrated analog peripherals for higher flash capacity and a dedicated control law accelerator - making MC56F81766MLF optimal for cost-sensitive, analog-rich motor control where LIN communication is required.

Availability

MC56F81766MLF is available at Aetrix Electronics and suitable for industrial motor control, solar inverter, and uninterruptible power supply (UPS) applications requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MC56F81766MLF 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 company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and IoT markets.

The MC56F81xxx family targets high-performance, safety-aware digital signal control in power electronics, with the MC56F81766MLF optimized for M-grade industrial environments requiring deterministic real-time response and integrated analog signal chain.

FAQ

What is the maximum operating frequency of the MC56F81766MLF core?

The MC56F81766MLF core operates at up to 100 MHz in fast mode, delivering 100 MIPS performance. This frequency is achieved using the internal PLL with an external 4–16 MHz crystal reference. The device also supports 50 MHz operation in normal mode for reduced power consumption while maintaining full peripheral functionality. All timing specifications in the MC56F81766MLF datasheet are validated at 100 MHz under M-grade temperature conditions.

Does the MC56F81766MLF support LIN communication?

Yes, the MC56F81766MLF supports LIN 2.2A slave functionality through its two queued serial communication interface (QSCI) modules. Each QSCI includes hardware LIN address match detection, idle-line and address-mark wakeup, and 1/16 bit-time noise filtering. The MC56F81766MLF does not implement LIN master mode or LIN transceiver physical layer - external transceivers like TJA1020 are required for bus-level compliance.

What analog peripherals are integrated into the MC56F81766MLF?

The MC56F81766MLF integrates dual 12-bit cyclic ADCs (each with 8 external channels and x1/x2/x4 programmable gain amplifiers), two operational amplifiers configurable as PGAs or filters, four analog comparators with integrated 8-bit DAC references, and one 12-bit DAC with automatic waveform generation. These peripherals are interconnected via the inter-module crossbar, enabling hardware-synchronized signal chains without CPU overhead - a key capability confirmed in the MC56F81766MLF technical data sheet.

Is the MC56F81766MLF pin-compatible with other members of the MC56F81xxx family?

The MC56F81766MLF shares the same 64-pin LQFP package and pinout with MC56F81768MLF and MC56F81748MLF, but differs from 48-pin variants like MC56F81746MLF. Pin compatibility is limited to devices sharing the "766" or "768" suffix and "MLF" suffix - MC56F81766MLF and MC56F81768MLF have identical pin assignments except for QSPI-related signals (which are No Connect on MC56F81766MLF). Always verify signal multiplexing tables in the MC56F81766MLF datasheet before substitution.

What safety features does the MC56F81766MLF include for industrial applications?

The MC56F81766MLF includes windowed COP watchdog with multiple clock source options, external watchdog monitor (EWM) with safe-mode output, cyclic redundancy check (CRC) generator for memory and firmware validation, and power supervisor with brownout reset and dual-level low-voltage interrupts. These features collectively support compliance with IEC 61508 SIL-2 and UL 1998 Class B requirements, as documented in the MC56F81766MLF safety manual and functional safety documentation package.