NXP Semiconductors MK51DX256CLK10

Overview

MK51DX256CLK10 from NXP Semiconductors (formerly Freescale) is a 32-bit ARM Cortex-M4 microcontroller with DSP extensions, designed for embedded control and signal processing in resource-constrained industrial and IoT edge nodes. It operates at up to 100 MHz, integrates 256 KB program flash and 4 KB FlexRAM, supports 1.71–3.6 V supply, and features dual 16-bit SAR ADCs with integrated PGA, two 12-bit DACs, and USB OTG - enabling closed-loop motor control and sensor fusion applications.

For engineers reviewing the MK51DX256CLK10 datasheet, MK51DX256CLK10 pinout, MK51DX256CLK10 application, or MK51DX256CLK10 equivalent, key selection considerations include its FlexMemory architecture (flash + FlexNVM), low-power stop modes down to 2.1 µA, 100 MHz real-time performance with DSP instructions, and integrated analog front-end for direct sensor interfacing without external signal conditioning.

Technical Context

The MK51DX256CLK10 implements a full-featured Kinetis K51 sub-family architecture centered on an ARM Cortex-M4 core with hardware DSP acceleration and single-cycle MAC operations. Its memory subsystem includes 256 KB on-chip flash with EEPROM emulation via FlexNVM, 4 KB FlexRAM, and up to 128 KB SRAM - all accessible under multiple low-power run/stop modes.

Peripherals are tightly coupled to the core via a multi-layer AHB bus matrix and supported by a 16-channel DMA controller. Clocking relies on a configurable multipurpose clock generator (MCG) supporting internal RC, external crystal (3–32 MHz), and 32 kHz RTC oscillator inputs - enabling precise timing for USB, PWM, and real-time control loops.

Key Specifications

Pinout & Package

Package: 121-pin MAPBGA (8 mm × 8 mm, MC suffix). Pinout conforms to K51 Sub-Family standard assignment per Document K51P121M100SF2V2, Section 8.2. Key functional groups include dedicated USB DP/DM, multiple ADC/DAC channels mapped to specific port pins (e.g., ADC0_SE0–ADC0_SE15 on PORTA/PORTB), FlexIO-capable pins, and configurable clock inputs (EXTAL/XTAL, EXTAL32/XTAL32).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MK51DX256CLK10, MK51DN512CMC10 trades FlexNVM for higher flash capacity while retaining identical real-time performance and analog integration; KE1xF128LQ64 reduces complexity and power at the expense of DSP capability, USB, and flexible nonvolatile storage - making it suitable only for simpler control tasks.

Availability

MK51DX256CLK10 is available at Aetrix Electronics and suitable for industrial motor control, smart energy metering, medical sensor hubs, and building automation nodes requiring stable component supply, long-term lifecycle support, and qualified automotive-grade variants.

Supply support for MK51DX256CLK10 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 ARM-based microcontrollers and edge processing.

The MK51DX256CLK10 belongs to the Kinetis K51 sub-family, engineered specifically for cost-sensitive industrial control and sensor processing applications demanding high analog integration, deterministic real-time response, and robust low-power operation.

FAQ

What is the maximum operating frequency and core type of the MK51DX256CLK10?

The MK51DX256CLK10 features an ARM Cortex-M4 core with DSP extensions, rated for operation up to 100 MHz across its specified temperature range (–40°C to +85°C). This frequency is achievable with proper decoupling, stable 1.71–3.6 V supply, and correct MCG configuration - delivering 125 DMIPS and enabling real-time signal processing tasks such as motor control and sensor fusion within the MK51DX256CLK10.

Does the MK51DX256CLK10 include on-chip EEPROM or data retention memory?

Yes, the MK51DX256CLK10 includes FlexNVM - a configurable memory block that can be partitioned to emulate EEPROM functionality. With 256 KB FlexNVM available, the MK51DX256CLK10 supports byte-write, wear-leveling, and data retention without external serial EEPROM, making it suitable for applications requiring frequent parameter updates like calibration data or event logs.

What analog peripherals are integrated into the MK51DX256CLK10?

The MK51DX256CLK10 integrates two independent 16-bit SAR ADCs (each with programmable gain amplifier up to x64), two 12-bit DACs, three analog comparators (each with integrated 6-bit DAC and reference selection), two operational amplifiers, two transimpedance amplifiers, and a precision voltage reference. These resources enable direct sensor interfacing and closed-loop analog control without external signal conditioning circuitry in the MK51DX256CLK10.

Which low-power modes does the MK51DX256CLK10 support, and what is the lowest current draw?

The MK51DX256CLK10 supports seven low-power modes including VLPR, VLPS, STOP, LLS, and three VLLS variants. In VLLS3 mode with RTC running from VBAT and selected wake sources enabled, the MK51DX256CLK10 achieves as low as 3.0 µA typical current draw at 3.0 V and –40°C to +25°C - enabling multi-year battery life in intermittent-sensing applications.

Is USB functionality available on the MK51DX256CLK10, and what type is supported?

Yes, the MK51DX256CLK10 includes a full-speed/low-speed USB 2.0 On-The-Go controller with an integrated transceiver. It supports device, host, and OTG roles, requires no external PHY, and provides on-chip termination and voltage regulation - allowing direct USB connectivity for firmware updates, data logging, or HID-class peripherals using the MK51DX256CLK10.