NXP Semiconductors MC56F81768LMLH

Overview

MC56F81768LMLH 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 x4 programmable gain amplifiers, an eFlexPWM module delivering 312 ps NanoEdge resolution, and supports industrial motor control, solar inverters, and UPS systems.

For engineers reviewing the MC56F81768LMLH datasheet, MC56F81768LMLH pinout, MC56F81768LMLH application, or MC56F81768LMLH equivalent, key selection criteria include its VDD/VSSA supply range (2.7–3.6 V), -40°C to 125°C M-grade temperature rating, 64-pin LQFP package, and integrated peripherals including LPI2C with PMBus support, QSCI with LIN slave, and hardware CRC generator.

Technical Context

The MC56F81768LMLH implements the 56800EX core with dual Harvard architecture, supporting concurrent instruction fetches 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 pre-amplifier gains (x1/x2/x4), and 10-cycle conversion time at up to 12.5 MHz clock rate.

The eFlexPWM module provides eight NanoEdge-capable PWM channels with 312 ps edge placement resolution, independent deadtime insertion per complementary pair, and synchronization via inter-module crossbar. Communication is handled by two QSCI modules (LIN slave capable), one QSPI (25 Mbit/s max), and two LPI2C modules supporting Full PMBus, Fast+, and Ultra Fast modes.

Key Specifications

Pinout & Package

MC56F81768LMLH is housed in a 64-pin LQFP (10 mm × 10 mm, 0.5 mm pitch) package with exposed thermal pad. Pin functions are defined per Table 2 of the MC56F81XXXL datasheet Rev. 3 (04/2025), with primary reset-state assignments including VDD (pins 29, 44, 60), VSS (pins 30, 43, 61), VDDA (pin 22), VSSA (pin 23), and JTAG signals TDI (pin 64), TDO (pin 62), TCK (pin 1).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC56F81768LMLH, MC56F82748VLH reduces memory and analog integration for lower BOM cost, while TMS320F280049CPTT trades integrated analog blocks for larger program memory and CLA acceleration-making it preferable for multi-loop control where external signal conditioning is already deployed.

Availability

MC56F81768LMLH is available at Aetrix Electronics and suitable for industrial motor control, solar inverter design, and medical power supply development requiring stable component supply across long production lifecycles.

Supply support for MC56F81768LMLH 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 MC56F81xxxL family was designed specifically for high-performance, safety-aware digital power conversion and motion control applications, integrating DSP-grade computation with robust analog front-ends and functional safety peripherals.

FAQ

What is the maximum operating frequency of the MC56F81768LMLH core?

The MC56F81768LMLH features a 32-bit 56800EX core rated for up to 100 MHz in fast mode, delivering 100 MIPS performance. This frequency enables sub-10 µs execution of complex control algorithms such as field-oriented control (FOC) and predictive current regulation. The MC56F81768LMLH achieves this speed with on-chip PLL support for input crystal frequencies between 8 MHz and 16 MHz.

Does the MC56F81768LMLH support LIN communication?

Yes, the MC56F81768LMLH includes two queued serial communication interface (QSCI) modules that support LIN slave functionality per ISO 9141-2 and LIN 2.x specifications. Each QSCI provides configurable baud rates, 4-word FIFOs, and hardware support for LIN wakeup detection via idle-line or address-mark methods. This capability allows the MC56F81768LMLH to serve as a node in automotive body electronics or industrial sensor networks.

What analog peripherals are integrated into the MC56F81768LMLH?

The MC56F81768LMLH integrates dual 12-bit cyclic ADCs (each with 8 external inputs), two programmable-gain operational amplifiers (up to x16), four analog comparators with integrated 8-bit DAC references, one 12-bit DAC, and on-chip temperature sensors. These peripherals enable full analog signal chain implementation-including current sensing, voltage monitoring, and reference generation-without external components in applications like motor drives and UPS systems.

Is the MC56F81768LMLH qualified for automotive or industrial temperature ranges?

Yes, the MC56F81768LMLH carries the M-grade qualification, specifying operation from -40°C to +125°C ambient temperature. This rating meets industrial requirements for under-hood automotive subsystems, factory automation drives, and outdoor renewable energy equipment. The device also includes built-in thermal protection features such as low-voltage interrupt (LVI) and brownout reset (BOR) circuitry aligned with IEC 60730 Class B compliance needs.

How does the eFlexPWM module in the MC56F81768LMLH differ from standard PWM peripherals?

The eFlexPWM module in the MC56F81768LMLH offers NanoEdge high-resolution capability with 312 ps edge placement precision, far exceeding typical 1–10 ns resolution found in conventional PWM blocks. It supports independent top/bottom deadtime insertion per complementary pair, fractional delay for arbitrary edge positioning, and hardware synchronization with ADC triggers. This enables precise gate timing for wide-bandgap devices (SiC/GaN) and eliminates software-based compensation in high-frequency power conversion designs using the MC56F81768LMLH.