NXP Semiconductors MK51DX256CMC10

Overview

MK51DX256CMC10 from NXP Semiconductors (formerly Freescale) is a 32-bit ARM Cortex-M4 microcontroller with DSP extensions, designed for embedded control and signal processing in industrial and consumer applications. It operates at up to 100 MHz, features 256 KB on-chip flash memory and 128 KB RAM, supports 1.71–3.6 V supply, and includes dual 16-bit SAR ADCs, two 12-bit DACs, USB OTG, and six UARTs.

For engineers reviewing the MK51DX256CMC10 datasheet, MK51DX256CMC10 pinout, MK51DX256CMC10 application, or MK51DX256CMC10 equivalent, key selection considerations include its FlexMemory architecture (256 KB flash + 4 KB FlexRAM), integrated analog subsystem (PGA, TIA, comparators), low-power stop modes down to 2.1 µA, and 121-pin MAPBGA package with LCD controller support.

Technical Context

The MK51DX256CMC10 implements an ARM Cortex-M4 core with hardware DSP instructions and single-cycle MAC, enabling real-time filtering and motor control algorithms. Its clock system integrates a multi-purpose clock generator (MCG) supporting crystal oscillators (3–32 MHz and 32 kHz), internal reference, and PLL-based frequency synthesis for precise timing across operating modes.

System-level integration includes a 16-channel DMA controller supporting up to 63 request sources, memory protection unit (MPU) with multi-master arbitration, and security modules such as hardware CRC and 128-bit unique chip ID. Analog functionality is tightly coupled with digital peripherals-e.g., programmable gain amplifiers (up to ×64) are embedded directly into each ADC channel, and transimpedance amplifiers interface with external photodiodes for optical sensing.

Key Specifications

Pinout & Package

The MK51DX256CMC10 is housed in a 121-ball MAPBGA package (8 mm × 8 mm, 0.5 mm pitch), designated by "MC" in the part number. This package supports high I/O density and thermal performance for embedded applications requiring mixed-signal integration and LCD driving capability.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar microcontroller applications.

Compared with KL27Z128VLH4 and MKE15Z128VLH7, the MK51DX256CMC10 provides higher computational throughput (100 MHz Cortex-M4 vs. ≤72 MHz M0+), richer analog integration (dual PGA-equipped ADCs, TIAs, comparators), and system-level peripherals (LCD, USB OTG, TSI) that reduce external component count in feature-rich embedded systems.

Availability

MK51DX256CMC10 is available at Aetrix Electronics and suitable for industrial motor control, smart energy metering, portable medical devices, and building automation HMI requiring stable component supply and long-term lifecycle support.

Supply support for MK51DX256CMC10 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 company specializing in secure connectivity solutions for automotive, industrial, and IoT applications, with leadership in ARM-based microcontrollers and edge processing.

The MK51DX256CMC10 belongs to the Kinetis K51 sub-family, designed specifically for cost-sensitive industrial and consumer applications demanding high analog integration, low-power operation, and human-machine interface capabilities.

FAQ

What is the maximum operating frequency of the MK51DX256CMC10?

The MK51DX256CMC10 features an ARM Cortex-M4 core rated for up to 100 MHz operation. This frequency is achievable across the full –40°C to +85°C temperature range and 1.71–3.6 V supply voltage, provided the MCG clock generator is configured in FEE mode with appropriate PLL settings and flash wait states are enabled.

Does the MK51DX256CMC10 support USB device mode with an on-chip transceiver?

Yes, the MK51DX256CMC10 includes a full-/low-speed USB On-The-Go controller with an integrated transceiver. It supports USB device, host, and OTG roles without requiring an external PHY. The USB_DP and USB_DM pins are routed directly to the internal transceiver, and the USB regulator (VREGIN) accepts 4.35–6.0 V input for self-powered operation.

How much FlexRAM does the MK51DX256CMC10 provide, and what is its purpose?

The MK51DX256CMC10 provides 4 KB of FlexRAM, which is user-configurable as either additional RAM or emulated EEPROM. Unlike standard RAM, FlexRAM retains data during low-power stop modes and supports wear leveling for reliable nonvolatile storage of calibration data, event logs, or configuration parameters without external serial EEPROM.

What analog peripherals are integrated into the MK51DX256CMC10?

The MK51DX256CMC10 integrates two independent 16-bit SAR ADCs, each with a programmable gain amplifier (up to ×64), two 12-bit DACs, three analog comparators (each with a built-in 6-bit DAC and programmable reference), two operational amplifiers, two transimpedance amplifiers, and a voltage reference module - forming a complete analog front-end for sensor signal conditioning and closed-loop control.

Is the MK51DX256CMC10 pin-compatible with other K51 family members like MK51DN512CMC10?

No, the MK51DX256CMC10 is not pin-compatible with MK51DN512CMC10. Although both share the same 121-pin MAPBGA package (MC), differences in internal memory mapping, peripheral routing, and signal multiplexing mean that PCB layout and firmware must be validated separately. The 'X' in MK51DX256CMC10 denotes FlexMemory support, while 'N' in MK51DN512CMC10 indicates flash-only configuration - resulting in distinct pin assignments for certain analog and debug functions.