NXP Semiconductors MC56F81868AMLHA

Overview

MC56F81868AMLHA 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 op-amps, four analog comparators with 8-bit DAC references, and an eFlexPWM module supporting 312 ps NanoEdge resolution. It targets industrial motor control, solar inverters, and UPS systems requiring real-time signal processing and precise PWM timing.

For engineers reviewing the MC56F81868AMLHA datasheet, MC56F81868AMLHA pinout, MC56F81868AMLHA application, or MC56F81868AMLHA equivalent, this page delivers verified specifications, package mapping to 64-pin LQFP, validated pin functions per NXP's official MC56F81XXXL Rev. 3 datasheet, and confirmed alternative DSCs for motion control and power conversion designs.

Technical Context

The MC56F81868AMLHA implements the 56800EX core with dual Harvard architecture, supporting concurrent instruction fetches and dual data accesses per cycle, plus hardware DO/REP loops and bit-reverse addressing for FFT acceleration. Its unified DSP/MCU architecture enables C-efficient code for both control-law execution and signal conditioning.

It features an inter-module crossbar enabling deterministic routing between eFlexPWM, ADCs, DAC, comparators, timers, and GPIO - critical for synchronized sampling and actuation in closed-loop motor drives. The NanoEdge PWM subsystem delivers 312 ps edge placement resolution with double-buffered registers and independent deadtime control per complementary pair.

Key Specifications

Pinout & Package

MC56F81868AMLHA is housed in a 64-pin LQFP package (10 mm × 10 mm, 0.5 mm pitch) with exposed thermal pad. Pin assignments follow NXP's MC56F81XXXL Rev. 3 datasheet Table 2 and Figure 4.2 (64-pin LQFP pinout diagram). All signals are multiplexed via GPIOx_PER and SIM GPSx registers; primary reset states are defined per signal description.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC56F81868AMLHA, MC56F82748VLH reduces memory and PWM precision for lower-cost motion control, while TMS320F280049CPTT adds a control law accelerator and larger memory for advanced power electronics - neither is pin-compatible, but both address overlapping industrial DSC use cases.

Availability

MC56F81868AMLHA is available at Aetrix Electronics and suitable for industrial motor control, solar inverter development, uninterruptible power supplies, and medical power management requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MC56F81868AMLHA 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 markets, with deep expertise in mixed-signal microcontrollers and power management.

The MC56F81xxx family was designed specifically for real-time digital power conversion and motor control, integrating high-resolution PWM, synchronized analog capture, and functional safety peripherals into a single 32-bit DSC platform.

FAQ

What is the maximum operating frequency of the MC56F81868AMLHA core?

The MC56F81868AMLHA 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 input, and it is fully supported across the −40°C to +125°C operating range specified for the M-grade device. The MC56F81868AMLHA's 56800EX core maintains deterministic timing at this speed for hard real-time control loops.

Does the MC56F81868AMLHA include hardware for functional safety compliance?

Yes, the MC56F81868AMLHA integrates multiple functional safety features including a windowed COP watchdog with selectable clock sources, an External Watchdog Monitor (EWM) with independent safe-mode output, a hardware CRC generator for memory and communication integrity, and a memory protection unit. These capabilities support ASIL-B development per ISO 26262 and SIL-2 per IEC 61508 when implemented per NXP's safety manual for the MC56F81XXXL family.

How many analog-to-digital converter channels does the MC56F81868AMLHA support?

The MC56F81868AMLHA includes two independent 12-bit cyclic ADCs: ADCA and ADCB. Each supports up to eight external analog inputs (ADCA0–ADCA7 and ADCB0–ADCB7), with built-in programmable gain amplifiers (x1/x2/x4) and support for single-ended or differential acquisition. Both ADCs can be hardware-triggered simultaneously via the inter-module crossbar for synchronized sampling in three-phase systems.

What package type and pin count does the MC56F81868AMLHA use?

The MC56F81868AMLHA is supplied in a 64-pin LQFP package (10 mm × 10 mm, 0.5 mm pitch) with exposed thermal pad. This matches the "64 LQFP" configuration listed in NXP's MC56F81XXXL datasheet Table 1 for the M-grade temperature variant. Pin assignments are fully documented in Section 4 (Pinout) and Table 2 (Signal Descriptions) of the Rev. 3 datasheet.

Can the MC56F81868AMLHA generate arbitrary waveforms using its DAC?

Yes, the MC56F81868AMLHA includes a 12-bit DAC with automatic waveform generation capability. It can produce pre-programmed square, triangle, and sawtooth waveforms - commonly used for slope compensation in current-mode switch-mode power supplies. The DAC output can be routed internally to comparators or externally via dedicated pins, with programmable period, update rate, and output range.