NXP Semiconductors MK11DX256AVLK5

Overview

MK11DX256AVLK5 from NXP Semiconductors (formerly Freescale) is a 32-bit ARM Cortex-M4 microcontroller with DSP extension, operating at up to 50 MHz, featuring 256 KB program flash with FlexMemory, 64 KB RAM, and integrated analog peripherals including 16-bit SAR ADC and 12-bit DAC. It targets industrial control, smart sensors, and low-power HMI applications requiring secure firmware execution and real-time signal processing.

For engineers reviewing the MK11DX256AVLK5 datasheet, MK11DX256AVLK5 pinout, MK11DX256AVLK5 application, or MK11DX256AVLK5 equivalent, key selection considerations include its -40°C to 105°C extended temperature range, hardware AES/SHA-256 encryption, FlexNVM-based data logging capability, and support for USB Device Charger Detect in embedded power management systems.

Technical Context

The MK11DX256AVLK5 implements an ARM Cortex-M4 core with single-cycle DSP instructions and a multi-purpose clock generator supporting crystal oscillators from 3–32 MHz and 32 kHz RTC crystals. Its memory subsystem includes 256 KB flash with FlexNVM partitioning (64 KB FlexNVM + 4 KB FlexRAM), enabling EEPROM-emulation without external components.

Peripherals include four UARTs, two I²C modules, two SPI interfaces, I²S audio interface, eight-channel PWM timer, real-time clock, and security modules such as hardware CRC, tamper detection, and a true random-number generator - all operating within 1.71–3.6 V supply and validated across -40°C to 105°C ambient conditions.

Key Specifications

Pinout & Package

Package: 80-pin LQFP (12 mm × 12 mm), RoHS-compliant, moisture sensitivity level 3 (MSL3).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MK11DX256AVLK5, MKE15Z256VLH8 offers lower cost and power but sacrifices cryptographic security and nonvolatile data storage flexibility, while MIMXRT1021DAG5A delivers higher compute throughput at the expense of increased system-level design effort and reduced out-of-box reliability for safety-critical firmware storage.

Availability

MK11DX256AVLK5 is available at Aetrix Electronics and suitable for industrial motor control, smart energy metering, medical wearable sensor hubs, and building automation controllers requiring stable component supply across extended temperature and long product lifecycles.

Supply support for MK11DX256AVLK5 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 markets, with roots in Freescale's Kinetis portfolio.

The MK11DX256AVLK5 belongs to the Kinetis K11 sub-family, designed specifically for cost-optimized, low-power industrial and consumer applications requiring robust security, analog integration, and extended temperature operation without external memory or crypto co-processors.

FAQ

What is the maximum operating frequency of the MK11DX256AVLK5?

The MK11DX256AVLK5 operates at a maximum system and core clock frequency of 50 MHz, as specified in the device clock specifications table. This frequency is achievable across the full -40°C to 105°C temperature range when supplied with 1.71–3.6 V and using the internal multi-purpose clock generator with appropriate PLL configuration. The MK11DX256AVLK5 maintains deterministic timing behavior at this speed, supporting real-time control loops with sub-microsecond interrupt response.

Does the MK11DX256AVLK5 support hardware encryption?

Yes, the MK11DX256AVLK5 includes dedicated hardware acceleration for DES, 3DES, AES (128/192/256-bit), MD5, SHA-1, and SHA-256 cryptographic algorithms. These modules operate independently of the CPU core, reducing execution time by over 90% compared to software-only implementations. The MK11DX256AVLK5 uses this capability for secure boot validation, firmware signature checking, and encrypted data logging in FlexNVM - all without compromising real-time performance.

What package type does the MK11DX256AVLK5 use?

The MK11DX256AVLK5 uses an 80-pin LQFP package (12 mm × 12 mm, 0.5 mm pitch), identified by the "LK" suffix in its part number. This package is RoHS-compliant, rated MSL3, and features exposed thermal pad for enhanced heat dissipation. The MK11DX256AVLK5's pinout supports full peripheral functionality including USB, multiple UARTs/I²C/SPI, ADC/DAC, and GPIO - making it suitable for compact industrial control boards where reflow compatibility and manual inspection are critical.

How much FlexNVM memory does the MK11DX256AVLK5 provide?

The MK11DX256AVLK5 provides 64 KB of FlexNVM and 4 KB of FlexRAM, both accessible as emulated EEPROM with byte-level erase and write capabilities. This configuration allows persistent data storage with wear leveling managed entirely in hardware - eliminating the need for external serial EEPROM in applications like energy meter log history, motor runtime counters, or calibration parameter storage. The MK11DX256AVLK5 FlexNVM is electrically and logically distinct from main program flash, enabling concurrent code execution and data logging.

Is the MK11DX256AVLK5 qualified for automotive applications?

The MK11DX256AVLK5 is not AEC-Q100 qualified and is intended for industrial and consumer applications. While it operates across -40°C to +105°C - matching many automotive under-hood temperature requirements - it lacks automotive-specific qualification testing (e.g., HTOL, ESD, EMC per ISO 11452). For automotive use, NXP recommends the pin-compatible S32K116 or K32L2B3 families. The MK11DX256AVLK5 remains suitable for industrial controls, smart meters, and medical devices where extended temperature and security are prioritized over automotive certification.