NXP Semiconductors MC56F81766LVLF

Overview

MC56F81766LVLF 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 with 128 KB flash and 20 KB RAM. It integrates dual 12-bit ADCs with x1/x2/x4 programmable gain amplifiers, an eFlexPWM module with 312 ps NanoEdge resolution, and supports industrial motor control, solar inverters, and UPS systems.

For engineers reviewing the MC56F81766LVLF datasheet, MC56F81766LVLF pinout, MC56F81766LVLF application, or MC56F81766LVLF equivalent, key selection criteria include V-grade temperature range (–40°C to +105°C), 64-pin LQFP package, dual QSCI with LIN slave support, LPI2C with full PMBus compliance, and hardware CRC generator for functional safety.

Technical Context

The MC56F81766LVLF implements the 56800EX core with dual Harvard architecture, supporting concurrent instruction fetch and dual data accesses per cycle, plus single-cycle 32×32→64-bit MAC operations. Its analog subsystem includes two independent 12-bit cyclic ADCs with 8-channel external inputs each, programmable gain amplifiers, and four comparators with integrated 8-bit DAC references.

Timing and control are managed by one 16-bit quad timer (four 16-bit channels), two 32-bit periodic interval timers (PITs), and one quadrature decoder (QDC). The eFlexPWM module delivers up to 12 PWM outputs - eight with NanoEdge high-resolution placement - and supports complementary pair configuration with independent deadtime insertion per pair.

Key Specifications

Pinout & Package

MC56F81766LVLF is housed in a 64-pin LQFP package (10 mm × 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 MC56F81746LVLF, the MC56F81766LVLF provides 2× flash/RAM and NanoEdge PWM for advanced inverter control; versus MC56F81668VLH, it trades M-grade thermal margin for lower unit cost while retaining identical feature set and pin compatibility in V-grade applications.

Availability

MC56F81766LVLF is available at Aetrix Electronics and suitable for industrial motor control, solar inverter design, and uninterruptible power supply development requiring stable component supply across multi-year production cycles.

Supply support for MC56F81766LVLF 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 digital signal processors.

The MC56F81xxxL family was designed specifically for real-time embedded control in power electronics - integrating DSP-level math performance with MCU-level peripheral flexibility for motor drives, inverters, and energy conversion systems.

FAQ

What is the maximum operating frequency of the MC56F81766LVLF core?

The MC56F81766LVLF 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 input. The 56800EX architecture supports single-cycle 32×32→64-bit MAC operations, enabling deterministic execution of complex control algorithms within tight timing windows. MC56F81766LVLF maintains this speed across its full V-grade temperature range (–40°C to +105°C) with proper power supply decoupling.

Does the MC56F81766LVLF support hardware-based functional safety features?

Yes, the MC56F81766LVLF includes multiple hardware features aligned with IEC 60730 Class B and IEC 61508 requirements: a windowed Computer Operating Properly (COP) watchdog with selectable clock sources (200 kHz IRC, crystal, bus clock), External Watchdog Monitor (EWM) with independent safe-state output, cyclic redundancy check (CRC) generator for memory and firmware validation, and brown-out reset with critical low-voltage interrupt. These features are implemented in dedicated hardware blocks and do not rely on software polling, ensuring robust fault detection in safety-critical power control applications using MC56F81766LVLF.

How many analog-to-digital converter channels does the MC56F81766LVLF provide?

The MC56F81766LVLF integrates two independent 12-bit cyclic ADC modules: ADCA and ADCB. Each supports up to eight external analog input channels, for a total of 16 configurable analog inputs. Both ADCs feature dynamic programmable gain amplifiers (x1, x2, x4), simultaneous sampling capability, and hardware-triggered conversions synchronized to PWM or timer events via the inter-module crossbar. MC56F81766LVLF also supports differential and unipolar differential acquisition modes, with conversion times as low as 80 ns per sample at maximum clock rate.

What communication interfaces are available on the MC56F81766LVLF?

The MC56F81766LVLF provides two queued SCI (QSCI) modules with LIN slave functionality, one queued SPI (QSPI) module supporting up to 25 Mbit/s, and two Low-Power I2C (LPI2C) modules compliant with PMBus v1.2. The QSCI modules include four-word FIFOs and support standard NRZ format with 16-bit integer + 3-bit fractional baud rate generation. LPI2C modules operate in Standard, Fast, Fast+, and Ultra Fast modes and support multi-master arbitration and clock stretching - essential for power telemetry in MC56F81766LVLF-based UPS and solar inverter designs.

Is the MC56F81766LVLF pin-compatible with other members of the MC56F81xxxL family?

Yes, the MC56F81766LVLF in 64-pin LQFP packaging is pin-compatible with other 64-pin variants in the MC56F81xxxL family, including MC56F81746LVLF and MC56F81668VLH. Signal assignments, power/ground pin locations, and JTAG interface pins match across these parts. However, functional differences exist - such as NanoEdge PWM availability in MC56F81766LVLF but not in MC56F81746LVLF - so firmware and peripheral initialization must be verified per device. MC56F81766LVLF retains identical pinout whether ordered with V-grade or M-grade temperature specification.