NXP Semiconductors MK22FN512VFX12R

Overview

MK22FN512VFX12 from NXP Semiconductors is a 120 MHz Arm® Cortex®-M4 microcontroller with FPU, 512 KB flash, 128 KB RAM, and USB LS/FS OTG 2.0 interface. It delivers 1.25 Dhrystone MIPS/MHz, operates from 1.71–3.6 V, supports -40 to 105°C ambient, and features two 16-bit SAR ADCs (1.2 MS/s) for industrial sensor interface and edge control applications.

For engineers reviewing the MK22FN512VFX12 datasheet, MK22FN512VFX12 pinout, MK22FN512VFX12 application, or MK22FN512VFX12 equivalent, key selection criteria include QFN-88 package footprint, USB crystal-less FS device operation, absence of FlexBus support, 60 GPIO count, and low-power stop mode current down to 0.14 µA (VLLS0, POR disabled).

Technical Context

The MK22FN512VFX12 implements a dual-oscillator clock system with 32 kHz RTC and 3–32 MHz main crystal options, plus three internal oscillators (32 kHz, 4 MHz, 48 MHz), all managed by a multipurpose clock generator with PLL and FLL. Its power architecture supports seven low-power modes including VLLS0 (0.14 µA typ.) with full state retention and 6 µs wakeup.

It integrates two 8-channel general-purpose/PWM timers, two 2-channel quadrature-decoder-capable timers, a real-time clock with independent power domain, and programmable delay block - enabling precise motor control timing and synchronized sensor sampling without external timing ICs.

Key Specifications

Pinout & Package

Package: 88-pin QFN (10 mm × 10 mm × 0.9 mm, pitch 0.4 mm), exposed thermal pad. Pinout validated per NXP document 98ASA00935D and K22P121M120SF7RM Section 5.3.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MK22FN512VLH12 and MK64FN1M0VLL12, the MK22FN512VFX12 uniquely balances compact QFN-88 packaging, ultra-low-power stop modes, and crystal-less USB - making it optimal for cost- and size-sensitive battery-powered USB peripherals where FlexBus or Ethernet are unnecessary.

Availability

MK22FN512VFX12 is available at Aetrix Electronics and suitable for industrial sensor nodes, USB edge gateways, motor control modules, and secure HMI controllers requiring stable component supply across extended product lifecycles.

Supply support for MK22FN512VFX12 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, energy-efficient processing solutions for automotive, industrial, and IoT markets.

The Kinetis K22F product line targets cost-sensitive, low-power applications requiring USB connectivity, high peripheral integration, and robust operating range - specifically engineered for industrial control, sensor edge nodes, and portable instrumentation.

FAQ

What is the maximum operating frequency of the MK22FN512VFX12?

The MK22FN512VFX12 operates at a maximum core frequency of 120 MHz using its Arm Cortex-M4 core with FPU. This speed is achievable when the multipurpose clock generator is configured in PEE mode with an external crystal or oscillator source meeting timing specifications. The MK22FN512VFX12 maintains full peripheral functionality-including USB OTG and ADC-across this frequency range under 1.71–3.6 V supply and -40 to 105°C conditions.

Does the MK22FN512VFX12 support crystal-less USB operation?

Yes, the MK22FN512VFX12 supports USB full-speed device mode without an external crystal via its internally calibrated 48 MHz IRC, achieving ±0.25% accuracy. This feature is explicitly enabled for USB FS device operation and eliminates the need for a 12 MHz crystal and associated load capacitors. Note that crystal-less operation applies only to USB device mode-not host or OTG host functionality-which requires an external clock source.

What is the GPIO count and package type of the MK22FN512VFX12?

The MK22FN512VFX12 uses an 88-pin QFN package (10 mm × 10 mm × 0.9 mm, 0.4 mm pitch) with an exposed thermal pad and provides 60 general-purpose I/O pins. This differs from other K22F variants: MK22FN512VDC12 offers 81 GPIOs in 121-ball XFBGA, while MK22FN512VLH12 provides 40 GPIOs in 64-pin LQFP. The QFN-88 footprint balances I/O density with thermal performance for compact industrial designs.

Does the MK22FN512VFX12 include FlexBus interface support?

No, the MK22FN512VFX12 does not support the FlexBus external bus interface. Per NXP documentation (K22P121M120SF7 Rev. 8, Section 1), FlexBus functionality is excluded in the VFX12 variant. This omission is specific to the 88-QFN package option; other variants like MK22FN512VDC12 (121-BGA) and MK22FN512VLH12 (64-LQFP) retain FlexBus support. Designers requiring external memory expansion must select an alternative K22F variant.

What are the lowest power consumption modes supported by the MK22FN512VFX12?

The MK22FN512VFX12 achieves its lowest active power in Very-Low-Power Run (VLPR) mode (0.62 mA typ. at 3.0 V) and its deepest sleep in Very-Low-Leakage Stop Mode 0 (VLLS0) at 0.14 µA (typ., POR disabled) with full register and RAM retention. Wakeup from VLLS0 occurs in ≤6 µs. These modes are validated across -40 to 105°C and enable multi-year battery operation in always-on sensing applications - a key differentiator versus competing Cortex-M4 MCUs in the same package class.