NXP Semiconductors MC56F81768MLH

Overview

MC56F81768MLH 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 128 KB flash, 20 KB RAM, dual 12-bit ADCs with x4 programmable gain, two op-amps, four comparators with 8-bit DAC references, and one 12-bit DAC - all in a 64-pin LQFP package rated for -40°C to 125°C operation. It targets industrial motor control, solar inverters, and UPS systems requiring high-resolution PWM and real-time analog processing.

For engineers reviewing the MC56F81768MLH datasheet, MC56F81768MLH pinout, MC56F81768MLH application, or MC56F81768MLH equivalent, key selection criteria include NanoEdge eFlexPWM (312 ps resolution), dual ADC synchronization via crossbar, LPI2C with full PMBus support, and M-grade temperature rating for harsh environments.

Technical Context

The MC56F81768MLH implements the 56800EX core with modified dual-Harvard architecture: three address buses, four data buses (two 32-bit primary), and hardware DO/REP loops enabling zero-overhead context switching. Its unified DSP/MCU instruction set supports fractional arithmetic, 16×16→32-bit and 32×32→64-bit MAC operations in single cycle.

Peripherals are tightly coupled via an inter-module crossbar and event generator: ADC conversions can be hardware-triggered by eFlexPWM events; comparator outputs feed into PWM fault protection; and QDC position data routes directly to PIT timers for closed-loop motion control - all without CPU intervention.

Key Specifications

Pinout & Package

MC56F81768MLH 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 MC56F81748MLH, the MC56F81768MLH provides 64 KB more flash and 8 KB more RAM for complex control algorithms and communication stacks; compared with MC56F81668MLH, it offers 14 additional GPIOs and 6 extra PWM channels - critical for multi-axis motion control and high-channel-count power conversion topologies.

Availability

MC56F81768MLH is available at Aetrix Electronics and suitable for industrial motor control, solar microinverter development, and uninterruptible power supply (UPS) design requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MC56F81768MLH 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 applications.

The MC56F81xxx family was designed specifically for real-time digital power conversion and motion control, combining DSP-level computational throughput with MCU-style peripheral integration and functional safety features for industrial-grade reliability.

FAQ

What is the maximum operating frequency of the MC56F81768MLH core?

The MC56F81768MLH core operates at up to 100 MHz in fast mode, delivering 100 MIPS performance. In normal mode, it runs at 50 MHz. This dual-mode capability allows dynamic trade-offs between computational throughput and power consumption depending on real-time workload demands within the MC56F81768MLH application environment.

Does the MC56F81768MLH support hardware-based PWM deadtime insertion?

Yes, the MC56F81768MLH's eFlexPWM module supports independent top and bottom deadtime insertion for each complementary PWM pair. Deadtime values are programmable in nanosecond increments and can be updated dynamically via hardware triggers - a critical feature for preventing shoot-through in three-phase inverter bridges using the MC56F81768MLH.

Can the MC56F81768MLH boot from external SPI flash memory?

No, the MC56F81768MLH boot ROM only supports booting from SCI (UART) or I²C interfaces, not SPI. External SPI flash must be initialized by firmware after reset; the MC56F81768MLH does not include native SPI boot loader functionality in its on-chip boot ROM.

What analog reference options are available for the comparators in the MC56F81768MLH?

Each of the four comparators in the MC56F81768MLH includes an integrated 8-bit DAC that serves as a programmable voltage reference. These DACs are independently configurable and can be driven by internal sources or software, enabling flexible threshold detection without external reference components in MC56F81768MLH-based designs.

Is the MC56F81768MLH pin-compatible with other members of the MC56F81xxx family?

Yes, the MC56F81768MLH shares the same 64-pin LQFP package and pinout with MC56F81748MLH and MC56F81668MLH. However, pin functions related to unused peripherals (e.g., QSPI on MC56F81768MLH vs absent on MC56F81668MLH) are reserved or NC - confirming mechanical and electrical compatibility but requiring firmware validation for full functional equivalence in the MC56F81768MLH migration path.