NXP Semiconductors MC56F81768AMLHA

Overview

MC56F81768AMLHA 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 amplifiers, one 12-bit DAC, two operational amplifiers, and an eFlexPWM module with 8 NanoEdge PWM channels offering 312 ps resolution. It targets industrial motor control, solar inverters, and UPS systems requiring high-precision timing and analog integration.

For engineers reviewing the MC56F81768AMLHA datasheet, MC56F81768AMLHA pinout, MC56F81768AMLHA application, or MC56F81768AMLHA equivalent, this DSC delivers deterministic real-time control with integrated analog front-end, high-resolution PWM, and dual communication interfaces (QSCI + LPI2C) for embedded power conversion and motion control designs.

Technical Context

The MC56F81768AMLHA 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 memory subsystem maps both flash and RAM into unified program/data spaces, enabling flexible code and data placement for C-efficient control algorithms.

Peripherals are tightly coupled via the Inter-Module Crossbar and Event Generator: ADC conversions synchronize to eFlexPWM events, op-amp outputs route to comparator references, and NanoEdge PWM edge placement is controlled by fractional delay registers. The device supports full PMBus over dual LPI2C modules and LIN slave functionality over two QSCI interfaces.

Key Specifications

Pinout & Package

MC56F81768AMLHA is housed in a 64-pin LQFP package (10 mm × 10 mm, 0.5 mm pitch) with exposed thermal pad. Pin functions include dedicated analog inputs (ADCA0–ADCA7, ADCB0–ADCB7), eFlexPWM outputs (PWMA0–PWMA7, PWMB0–PWMB7), dual LPI2C (SCL0/SDA0, SCL1/SDA1), two QSCI interfaces (TX0/RX0, TX1/RX1), and JTAG/EOnCE debug pins (TCK/TDI/TDO/TMS).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC56F82748VLH, MC56F81768AMLHA provides double flash/RAM, full 8-channel ADC support, NanoEdge PWM, and dual LPI2C - making it essential for complex inverters. Versus TMS320F280049CPTT, it trades raw compute for integrated analog peripherals, lowering system-level cost and board area in space-constrained medical or solar applications.

Availability

MC56F81768AMLHA is available at Aetrix Electronics and suitable for industrial motor control, solar inverter design, and uninterruptible power supply development requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MC56F81768AMLHA 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 focused on secure connectivity solutions for automotive, industrial, and IoT applications, with deep expertise in mixed-signal microcontrollers and power management.

The MC56F81xxxL family was designed specifically for high-performance digital power conversion and motion control, integrating DSP-level math capability with MCU-style peripheral flexibility and analog signal chain components on a single die.

FAQ

What is the maximum operating frequency of the MC56F81768AMLHA core?

The MC56F81768AMLHA 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 device also supports 50 MHz operation in normal mode for lower-power applications. All timing specifications in the datasheet - including ADC conversion time and PWM resolution - are validated at 100 MHz operation.

Does the MC56F81768AMLHA support hardware-based deadtime insertion for PWM outputs?

Yes, the MC56F81768AMLHA's eFlexPWM module supports independent top and bottom deadtime insertion for each complementary PWM pair. Deadtime values are programmable in nanosecond increments when NanoEdge is disabled, and with 312 ps granularity when enabled. This hardware-controlled deadtime prevents shoot-through in half-bridge configurations without CPU intervention or software timing loops.

Can the MC56F81768AMLHA boot directly from an external SPI flash device?

No, the MC56F81768AMLHA does not support direct boot from external SPI flash. Its Boot ROM only supports booting from internal flash or via serial interfaces - specifically SCI (UART) and I²C - using the Serial Bootloader protocol. External memory must be accessed post-boot via QSPI peripheral, which operates in master mode only and requires firmware initialization.

What analog reference options are available for the comparators in the MC56F81768AMLHA?

Each of the four comparators in the MC56F81768AMLHA can use either an external pin input or an internal 8-bit DAC output as its reference voltage. The DACs are independently programmable (0–3.3 V in 13 mV steps) and can be updated dynamically via register writes or triggered by PWM events. This eliminates need for external precision voltage dividers in overvoltage/overcurrent protection circuits.

Is the MC56F81768AMLHA pin-compatible with other members of the MC56F81xxxL family?

Yes, the MC56F81768AMLHA shares identical pinout and package (64-pin LQFP) with all other 64-pin variants in the MC56F81xxxL family, including MC56F81748AMLHA and MC56F81668AMLHA. Signal multiplexing, power pin locations, and JTAG/debug interface assignments are fully consistent, enabling hardware reuse across different flash/RAM configurations within the same footprint.