NXP Semiconductors MC56F81766VLF

Overview

MC56F81766VLF from NXP Semiconductors is a 32-bit digital signal controller (DSC) based on the 56800EX core, delivering 100 MIPS at 100 MHz in fast mode. It integrates dual 12-bit ADCs with x1/x2/x4 programmable gain amplifiers, an eFlexPWM module with 312 ps NanoEdge resolution across 8 channels, and supports industrial motor control, solar inverters, and UPS systems.

For engineers reviewing the MC56F81766VLF datasheet, MC56F81766VLF pinout, MC56F81766VLF application, or MC56F81766VLF equivalent, this DSC offers verified 128 KB flash, 20 KB RAM, dual LPI2C with full PMBus support, 64-pin LQFP package, and -40°C to 105°C V-temperature grade operation - critical for real-time embedded power conversion and motion control designs.

Technical Context

The MC56F81766VLF implements the 56800EX core with modified dual-Harvard architecture, supporting concurrent instruction fetch and dual data accesses per cycle, plus hardware DO/REP loops and bit-reverse addressing for FFT acceleration. Its unified DSP/MCU architecture enables efficient C compilation and zero-overhead context switching via nine shadow registers.

Peripherally, it features an eFlexPWM submodule with independent top/bottom deadtime insertion, fractional delay for 312 ps edge placement, and crossbar-synchronized ADC triggering. Analog subsystem includes two 12-bit cyclic ADCs (8-channel each), four comparators with integrated 8-bit DAC references, two op-amps (gain up to x16), and one 12-bit DAC with automatic waveform generation.

Key Specifications

Pinout & Package

MC56F81766VLF is housed in a 64-pin LQFP (10 mm × 10 mm, 0.5 mm pitch) package 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 MC56F81766VLF, MC56F83766VLF provides scalable memory and PWM channel count within identical pinout and thermal envelope, while TMS320F280049CPT offers higher raw CPU speed but demands external components for equivalent analog functionality and protocol support.

Availability

MC56F81766VLF is available at Aetrix Electronics and suitable for industrial motor control, solar inverter design, and uninterruptible power supply development requiring stable component supply across extended production lifecycles.

Supply support for MC56F81766VLF 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 specializing in secure connectivity solutions for automotive, industrial, and IoT applications, with deep expertise in mixed-signal microcontrollers and power management.

The MC56F81xxx family was designed specifically for real-time digital power conversion and motion control, combining DSP-level math performance with MCU-level peripheral integration to replace discrete DSP+MCU combinations in cost-sensitive industrial systems.

FAQ

What is the maximum operating frequency of the MC56F81766VLF core?

The MC56F81766VLF core operates at up to 100 MHz in fast mode, delivering 100 MIPS performance. This frequency is achieved using the on-chip PLL with an 8–16 MHz crystal reference. The device also supports 50 MHz operation in normal mode for lower-power applications. All timing specifications in the MC56F81766VLF datasheet are validated at 100 MHz under -40°C to 105°C conditions.

Does the MC56F81766VLF support LIN communication?

Yes, the MC56F81766VLF supports LIN slave functionality through its two queued SCI (QSCI) modules. Each QSCI includes hardware LIN frame detection, automatic checksum calculation, and wakeup-on-idle/address capabilities. The MC56F81766VLF implements LIN 2.2A compliance in slave mode without requiring external transceivers for basic node functionality.

How many analog-to-digital converter channels does the MC56F81766VLF have?

The MC56F81766VLF integrates two independent 12-bit cyclic ADCs: ADC0 and ADC1. Each supports 8 external analog inputs, resulting in 16 total external channels. Both ADCs feature programmable x1/x2/x4 gain amplifiers, simultaneous sampling capability, and hardware-triggered conversions synchronized to eFlexPWM events - enabling precise multi-phase current measurement in motor control applications using the MC56F81766VLF.

What package type and pin count does the MC56F81766VLF use?

The MC56F81766VLF is supplied in a 64-pin LQFP package (10 mm × 10 mm, 0.5 mm pitch) with exposed thermal pad. This matches the pinout defined in Table 2 of the MC56F81xxx datasheet Rev. 1.1. The package supports industrial temperature range (-40°C to 105°C) and is compatible with standard reflow profiles for lead-free assembly. No other package variants are assigned to the MC56F81766VLF orderable part number.

Is the MC56F81766VLF suitable for safety-critical applications like UPS or medical power supplies?

Yes, the MC56F81766VLF includes multiple hardware safety features required for such applications: windowed COP watchdog with selectable clock sources, External Watchdog Monitor (EWM) with safe-mode output, CRC generator for memory integrity checking, and brown-out reset with critical low-voltage interrupt. These features enable compliance with EN60730 Class B and IEC 62304 requirements when implemented per NXP's safety manual, making the MC56F81766VLF appropriate for UPS and medical power supply control.