NXP Semiconductors MK22DX256VLK5

Overview

MK22DX256VLK5 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 on-chip program flash with FlexMemory, 64 KB RAM, and integrated USB OTG, ADC, DAC, and multiple low-power modes. It targets industrial control, sensor hubs, and USB-connected embedded systems requiring deterministic real-time response and mixed-signal integration.

For engineers reviewing the MK22DX256VLK5 datasheet, MK22DX256VLK5 pinout, MK22DX256VLK5 application, or MK22DX256VLK5 equivalent, key selection considerations include its 80-pin LQFP package, -40°C to +105°C extended temperature grade, FlexNVM configuration enabling EEPROM-like wear leveling, 16-bit SAR ADC with hardware averaging, and USB full-speed transceiver with charger detection.

Technical Context

The MK22DX256VLK5 implements an ARM Cortex-M4 core with single-cycle DSP instructions and a Memory Protection Unit (MPU), paired with a multi-purpose clock generator supporting crystal oscillators (3–32 MHz and 32 kHz), internal reference, and PLL-based frequency synthesis. Its memory subsystem includes 256 KB flash with 4 KB FlexRAM and 64 KB SRAM, all accessible via a high-speed bus matrix with configurable wait states.

Peripherals are organized into low-power domains: eight-channel PWM timer with motor control extensions, two general-purpose timers with quadrature decode, real-time clock with battery backup, four UARTs, two SPIs, two I²Cs, I²S, and a 12-bit DAC with programmable output range. Security is enforced via hardware CRC, 128-bit unique ID, and flash protection mechanisms.

Key Specifications

Pinout & Package

Package: 80-pin LQFP (12 mm × 12 mm, 0.5 mm pitch), RoHS-compliant, moisture sensitivity level 3.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MK22DX256VLK5, MK22FN512VLH12 trades FlexNVM flexibility for higher clock speed and flash capacity, while STM32F411REY6TR adds FPU and larger RAM at the cost of USB integration and package accessibility - making MK22DX256VLK5 optimal for cost-sensitive, USB-native, EEPROM-reliant industrial edge nodes.

Availability

MK22DX256VLK5 is available at Aetrix Electronics and suitable for industrial automation, medical diagnostics, and USB-connected embedded systems requiring stable component supply, long-term lifecycle assurance, and extended temperature operation.

Supply support for MK22DX256VLK5 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, IoT, and mobile applications.

The MK22DX256VLK5 belongs to the Kinetis K22 family - a line of energy-efficient, mixed-signal ARM Cortex-M4 MCUs designed specifically for industrial control, sensor fusion, and USB-enabled edge devices demanding robustness and integrated analog peripherals.

FAQ

What is the maximum operating frequency of the MK22DX256VLK5?

The MK22DX256VLK5 operates at a maximum system and core clock frequency of 50 MHz. This is achieved using the internal PLL driven by the main crystal oscillator (3–32 MHz) or internal reference. At this speed, the ARM Cortex-M4 core delivers 1.25 Dhrystone MIPS per MHz, enabling deterministic real-time execution for control algorithms and communication stacks. The MK22DX256VLK5 maintains full USB full-speed functionality at 50 MHz, unlike some variants that throttle to 20 MHz when USB is active.

Does the MK22DX256VLK5 include an integrated USB transceiver?

Yes, the MK22DX256VLK5 integrates a full-speed USB 2.0 transceiver compliant with USB On-The-Go specifications. Pins USB0_DP and USB0_DM connect directly to the USB connector without requiring external PHY components. It supports device, host, and OTG roles, and includes USB Device Charger Detect (DCD) circuitry to identify charging sources per USB Battery Charging Specification 1.2 - a feature confirmed in the K22P80M50SF4 datasheet Section 6.8.1 and Table 6.8.2.

What memory configuration does the MK22DX256VLK5 provide?

The MK22DX256VLK5 features 256 KB of program flash memory and 64 KB of SRAM. Crucially, it includes FlexMemory: 64 KB of FlexNVM (emulating EEPROM) and 4 KB of FlexRAM (used as nonvolatile data storage or cache). This configuration is explicitly defined by the "X" in the part number (MK22DX256VLK5), indicating FlexMemory support per the K22 Sub-Family Data Sheet Section 2.3. Unlike standard flash-only variants, FlexNVM enables byte-level writes and wear leveling for data logging and calibration storage.

What is the operating temperature range for the MK22DX256VLK5?

The MK22DX256VLK5 is rated for operation from -40°C to +105°C ambient temperature. This extended industrial temperature grade is indicated by the "V" in the part number suffix (MK22DX256VLK5) per the K22 Sub-Family Data Sheet Section 2.3. It is validated across this range for all key parameters including flash programming, ADC accuracy, USB timing, and low-power mode currents - making it suitable for under-hood automotive modules, factory-floor controllers, and outdoor instrumentation.

How many ADC channels and what resolution does the MK22DX256VLK5 support?

The MK22DX256VLK5 integrates a 16-bit successive approximation register (SAR) ADC with up to 32 input channels, configurable for single-ended or differential acquisition. It supports hardware averaging (up to 32 samples) to improve effective resolution beyond 16 bits, and includes programmable gain amplifiers on select inputs. These capabilities are documented in Sections 6.6.1 and Table 6.6.1 of the K22P80M50SF4 datasheet, confirming its use in precision sensor interfaces where noise rejection and dynamic range are critical.

Is the MK22DX256VLK5 pin-compatible with other K22 family members?

No, the MK22DX256VLK5 is not universally pin-compatible across the K22 family. Its 80-pin LQFP package (identifier "LK") differs from 64-pin (LH), 48-pin (FT/LF), and 100-pin (LL) variants. Even within the same pin count, signal multiplexing varies between sub-families (e.g., MK22DN vs. MK22DX) and flash configurations. Pin assignments must be verified against the specific "K22 Pinouts" section (Section 8.2) of the K22P80M50SF4 datasheet - which confirms unique mapping for MK22DX256VLK5, particularly for FlexMemory control signals and USB routing.