NXP Semiconductors MC56F81768VLH

Overview

MC56F81768VLH 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, and 128 KB flash + 20 KB RAM. Used in industrial motor control, solar inverters, and UPS systems where real-time analog processing and high-resolution PWM timing are critical.

For engineers reviewing the MC56F81768VLH datasheet, MC56F81768VLH pinout, MC56F81768VLH application, or MC56F81768VLH equivalent, this page provides verified package mapping (64-pin LQFP), confirmed peripheral register-level behavior, NanoEdge PWM timing constraints, ADC synchronization via crossbar, and thermal operation limits (–40°C to 105°C V-temp grade).

Technical Context

The MC56F81768VLH implements the 56800EX core with modified dual Harvard architecture-three address buses, four data buses (two 32-bit primary), and single-cycle 32×32→64-bit MAC. Its eFlexPWM submodule supports fractional delay for 312 ps edge placement and independent deadtime insertion per complementary pair.

Analog subsystem includes two 12-bit cyclic ADCs with parallel scan mode, programmable gain amplifiers, and hardware-triggered conversion synchronized to PWM events via the inter-module crossbar. The LPI2C modules support Full PMBus, and QSCI includes LIN slave functionality with 1/16-bit-time noise detection.

Key Specifications

Pinout & Package

MC56F81768VLH is housed in a 64-pin LQFP (10 mm × 10 mm, 0.5 mm pitch) with exposed thermal pad. Pin functions include dedicated ADC input channels (ADCA0–ADCA7, ADCB0–ADCB7), eFlexPWM outputs (PWMA0–PWMA7, PWMB0–PWMB3), and dual LPI2C/SPI/SCI interfaces routed through GPIO multiplexing.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC56F81768VLH, MC56F82748VLH trades NanoEdge PWM for USB and larger RAM, while TMS320F280049CPTT offers superior computational throughput and HRPWM but demands more external analog components and toolchain migration.

Availability

MC56F81768VLH is available at Aetrix Electronics and suitable for industrial motor control, solar inverter DC-AC stage, and uninterruptible power supply (UPS) applications requiring stable component supply, long-term lifecycle assurance, and automotive-grade reliability validation.

Supply support for MC56F81768VLH 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 deep expertise in real-time control and mixed-signal integration.

The MC56F81xxx family was designed specifically for cost-sensitive, high-reliability industrial power conversion and motion control applications-emphasizing integrated analog peripherals, deterministic PWM timing, and functional safety compliance (EN60730).

FAQ

What is the maximum ADC sampling rate supported by the MC56F81768VLH?

The MC56F81768VLH supports a maximum ADC clock frequency of 12.5 MHz, enabling a single conversion time of 10 ADC clock cycles (80 ns). With parallel scan mode, both ADCs can sample simultaneously, achieving up to 12.5 MSPS aggregate throughput. This rate is validated for use with the internal x4 programmable gain amplifier without saturation.

Does the MC56F81768VLH support hardware-based deadtime insertion for eFlexPWM outputs?

Yes, the MC56F81768VLH supports independent, hardware-configurable deadtime insertion for each complementary PWM pair within the eFlexPWM module. Deadtime values can be programmed in nanosecond increments using 312 ps resolution registers, and the feature operates without CPU intervention during runtime.

Can the MC56F81768VLH operate in low-power stop mode while maintaining analog monitoring capability?

Yes, the MC56F81768VLH supports analog monitoring in stop mode via its 200 kHz internal RC oscillator, which continues to clock the COP watchdog, EWM, and Periodic Interval Timers. However, the ADCs and eFlexPWM require wake-up to active mode for conversion or PWM generation-no continuous analog capture occurs in stop mode.

What clock sources are available for the MC56F81768VLH's Phase-Locked Loop (PLL)?

The MC56F81768VLH PLL accepts an external reference clock between 8 MHz and 16 MHz, typically from a crystal oscillator connected to the XTAL/EXTAL pins. Internal 8 MHz IRC may be used as a fallback, but PLL lock is not guaranteed outside the 8–16 MHz range per datasheet specification.

How many GPIO pins on the MC56F81768VLH support interrupt-on-change functionality?

All 54 GPIO pins on the MC56F81768VLH support interrupt-on-change capability when configured in input mode. Each pin has individually maskable edge-detection logic (rising/falling/both) and feeds into the 5-level priority interrupt controller, enabling responsive event-driven control in motor commutation or fault detection.