NXP Semiconductors MC56F81768LVLH

Overview

MC56F81768LVLH 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, two op-amps, and an eFlexPWM module with 312 ps NanoEdge resolution-targeting industrial motor control, solar inverters, and UPS systems.

For engineers reviewing the MC56F81768LVLH datasheet, MC56F81768LVLH pinout, MC56F81768LVLH application, or MC56F81768LVLH equivalent, key selection criteria include VDD/VSSA supply separation, 64-pin LQFP package compatibility, -40°C to 105°C V-grade operation, and support for PMBus via dual LPI2C modules.

Technical Context

The MC56F81768LVLH implements a unified 32-bit 56800EX DSP/MCU architecture with three address buses and four data buses enabling concurrent instruction fetch and dual data access. Its eFlexPWM submodule supports 8-channel NanoEdge PWM with 312 ps edge placement resolution and independent deadtime control per complementary pair.

Analog subsystem integration includes two 12-bit cyclic ADCs (each with 8 external channels and programmable x1/x2/x4 pre-amplifier), four comparators with integrated 8-bit DAC references, and a 12-bit DAC supporting automatic waveform generation (square/triangle/sawtooth) for slope compensation in power conversion.

Key Specifications

Pinout & Package

MC56F81768LVLH is housed in a 64-pin LQFP (7 mm × 7 mm, 0.5 mm pitch) package with dedicated VDD/VSS and VDDA/VSSA power/ground pairs, VCAP decoupling pin, JTAG debug interface (TCK/TDI/TDO/TMS), and GPIO-peripheral multiplexing controlled via SIM GPSx registers.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC56F81748LVLH, the MC56F81768LVLH provides 64 KB more flash and 8 KB more RAM for larger control law implementations and dual-application firmware images; versus MC56F81668LVLH, it delivers 15 additional GPIOs and full 64-pin peripheral mapping essential for complex industrial I/O expansion.

Availability

MC56F81768LVLH 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 product lifecycles.

Supply support for MC56F81768LVLH 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 markets, with over 40 years of microcontroller innovation.

The MC56F81xxxL family was designed specifically for high-performance digital power conversion and real-time motor control, integrating DSP-level math throughput with MCU-level peripheral flexibility in a single chip.

FAQ

What is the maximum operating frequency and temperature grade of the MC56F81768LVLH?

The MC56F81768LVLH operates at up to 100 MHz in fast mode and is rated for V-grade industrial temperature range of -40°C to +105°C. This specification is validated under 2.7–3.6 V supply conditions and applies to all core and peripheral functions including eFlexPWM, ADC, and communication modules as defined in the official NXP datasheet Rev. 3 (04/2025). The MC56F81768LVLH maintains full timing compliance across this range without derating.

Does the MC56F81768LVLH support PMBus communication, and how is it implemented?

Yes, the MC56F81768LVLH supports Full PMBus v1.3 via its two LPI2C modules, which include hardware command FIFOs, configurable clock stretching, and slave-mode addressing for 7-bit/10-bit devices. Each LPI2C can operate independently-enabling simultaneous monitoring of multiple PMBus-compatible power ICs such as digital DC-DC controllers or smart battery gauges. The MC56F81768LVLH firmware handles PMBus command parsing and response generation without CPU overhead due to dedicated LPI2C interrupt and DMA support.

How many analog input channels does the MC56F81768LVLH support, and what ADC features are included?

The MC56F81768LVLH integrates two independent 12-bit cyclic ADCs, each supporting 8 external analog input channels (16 total), with built-in x1/x2/x4 programmable gain amplifiers, offset/limit detection, and zero-crossing calculation. Both ADCs support parallel scan mode for simultaneous sampling, hardware triggering from eFlexPWM reload events, and sequential storage of up to 8 results per conversion sequence. These capabilities are fully documented for the MC56F81768LVLH in Section 11.5 of the datasheet.

What PWM resolution and channel count does the MC56F81768LVLH provide, and how is NanoEdge utilized?

The MC56F81768LVLH features an eFlexPWM module with up to 12 total outputs, including 8 NanoEdge-capable channels delivering 312 ps resolution for period, duty cycle, and deadtime control. NanoEdge functionality is enabled per submodule and allows arbitrary edge placement independent of base PWM frequency-critical for adaptive deadtime compensation in SiC/GaN half-bridges. All 8 NanoEdge channels are accessible in the 64-pin LQFP package of the MC56F81768LVLH as confirmed in Table 1 and Section 1.5.1 of the datasheet.

Is the MC56F81768LVLH pin-compatible with other members of the MC56F81xxxL family, and which packages share the same footprint?

Yes, the MC56F81768LVLH is pin-compatible with all 64-pin LQFP variants in the MC56F81xxxL family-including MC56F81748LVLH and MC56F81668LVLH-sharing identical pin assignments, power sequencing, and peripheral multiplexing. The "LVLH" suffix denotes the 64-pin LQFP package with wettable flank leads, and all such variants use the same mechanical outline and thermal pad layout per NXP package drawing SOT1086. This compatibility allows direct substitution within the same PCB design when memory or peripheral requirements change.