NXP Semiconductors MC56F81766AMLFA

Overview

MC56F81766AMLFA 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, and an eFlexPWM module with 312 ps NanoEdge resolution. It targets industrial motor control, solar inverters, and UPS systems requiring real-time analog-digital processing and high-resolution PWM.

For engineers reviewing the MC56F81766AMLFA datasheet, MC56F81766AMLFA pinout, MC56F81766AMLFA application, or MC56F81766AMLFA equivalent, key selection criteria include M-grade temperature range (–40°C to +125°C), 64-pin LQFP package, dual QSCI with LIN slave support, LPI2C with full PMBus compliance, and eDMA with 4 channels supporting 63 request sources.

Technical Context

The MC56F81766AMLFA implements the 56800EX core with dual Harvard architecture, three address buses, and four data buses enabling concurrent instruction fetch and dual data access per cycle. It supports fractional/integer arithmetic, single-cycle 32×32→64-bit MAC, and hardware DO/REP loops for efficient DSP algorithm execution.

Its analog subsystem includes two independent 12-bit cyclic ADCs with 8-channel external inputs, programmable pre-amplifier gain (x1/x2/x4), and synchronization via crossbar to eFlexPWM or timers. The eFlexPWM module delivers 8 high-resolution outputs with 312 ps edge placement resolution and configurable deadtime per complementary pair.

Key Specifications

Pinout & Package

MC56F81766AMLFA 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 GPIO and SIM peripheral enable registers; primary reset state defaults to dedicated signal roles.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC56F81766AMLFA, MC56F81768AMLFA adds QSPI capability without altering pinout or thermal specs, while MC56F81666VMLFA trades M-grade temperature and memory size for lower unit cost-both retain identical peripheral sets and software footprint.

Availability

MC56F81766AMLFA is available at Aetrix Electronics and suitable for industrial motor control, solar inverter design, and uninterruptible power supply development requiring stable component supply across long production lifecycles.

Supply support for MC56F81766AMLFA 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 applications.

The MC56F81xxx family delivers integrated DSP+MCU performance for real-time control in power electronics, motion systems, and energy conversion-designed to replace discrete microcontroller + DSP combinations with single-chip efficiency.

FAQ

What is the maximum operating frequency of the MC56F81766AMLFA core?

The MC56F81766AMLFA core operates at up to 100 MHz in fast mode, delivering 100 MIPS performance. This frequency is achieved using the internal PLL with an 8–16 MHz crystal oscillator input. The device also supports 50 MHz operation in normal mode for lower-power applications. All timing-critical peripherals-including eFlexPWM, ADC, and timers-are fully functional at 100 MHz, and the MC56F81766AMLFA datasheet specifies AC electrical characteristics validated across the full temperature and voltage range.

Does the MC56F81766AMLFA support LIN communication?

Yes, the MC56F81766AMLFA supports LIN slave functionality through its two queued SCI (QSCI) modules. Each QSCI module implements LIN 2.2A protocol features including automatic header detection, checksum verification, and response time monitoring. The MC56F81766AMLFA does not support LIN master mode, and LIN operation requires configuration of the QSCI baud rate generator and LIN-specific control registers. No external transceiver is integrated; a standard LIN physical layer IC must be used.

What analog peripherals are integrated into the MC56F81766AMLFA?

The MC56F81766AMLFA integrates dual 12-bit cyclic ADCs (each with 8 external channels and x1/x2/x4 programmable gain), two operational amplifiers configurable as PGAs or filters, four analog comparators each with an integrated 8-bit DAC reference, and one 12-bit DAC with automatic waveform generation. All analog blocks share VDDA/VSSA supplies and are synchronized via the inter-module crossbar. The MC56F81766AMLFA does not include temperature sensor output pins-on-die temperature sensing is accessible only via ADC channel ANA0.

Is the MC56F81766AMLFA pin-compatible with other members of the MC56F81xxx family?

Yes, the MC56F81766AMLFA is pin-compatible with all 64-pin LQFP variants in the MC56F81xxx family, including MC56F81768AMLFA and MC56F81666VMLFA. Pin assignments for power, ground, JTAG, ADC inputs, PWM outputs, and communication interfaces are identical across these parts. Differences are limited to internal feature enablement (e.g., QSPI presence) and memory size-no PCB redesign is required when migrating between these 64-pin variants.

What debug interface does the MC56F81766AMLFA provide?

The MC56F81766AMLFA provides JTAG/enhanced On-Chip Emulation (EOnCE) for real-time, non-intrusive debugging. It supports full breakpoint, watchpoint, and trace capabilities via standard JTAG pins (TCK, TMS, TDI, TDO, TRST_B). The MC56F81766AMLFA does not include SWD or cJTAG interfaces. Debug access remains active in all power modes except stop mode, and the EOnCE module operates independently of CPU clock speed-enabling reliable debugging even during low-frequency or variable-clock operation.