NXP Semiconductors MK20DX128VFT5

Overview

MK20DX128VFT5 from NXP Semiconductors (formerly Freescale) is a 50 MHz ARM Cortex-M4 microcontroller with DSP extension, 128 KB program flash, 16 KB RAM, and FlexMemory support. It integrates USB OTG, 16-bit SAR ADC, dual comparators with 6-bit DAC, real-time clock, and eight-channel PWM timer. Designed for industrial control and sensor fusion applications requiring deterministic real-time response and low-power operation.

For engineers reviewing the MK20DX128VFT5 datasheet, MK20DX128VFT5 pinout, MK20DX128VFT5 application, or MK20DX128VFT5 equivalent, key selection considerations include its -40°C to 105°C extended temperature rating, 48-pin QFN (7 mm × 7 mm) package, FlexNVM capability for data logging, and USB full-speed OTG controller with on-chip transceiver.

Technical Context

The MK20DX128VFT5 implements an ARM Cortex-M4 core with hardware DSP instructions and single-cycle MAC, delivering 1.25 Dhrystone MIPS per MHz at 50 MHz. Its memory subsystem includes 128 KB flash, 16 KB SRAM, and FlexMemory architecture enabling configurable partitioning of up to 32 KB as FlexNVM (for EEPROM emulation) and 2 KB as FlexRAM (for fast nonvolatile data storage).

Peripherals are clocked via a multi-source clock system supporting 3–32 MHz crystal oscillator, 32 kHz RTC crystal, and internal MCG with FLL/PLL options. Power management includes seven low-power modes - from VLPR (867 µA @ 3 V) to VLLS0 (0.176 µA @ –40°C to 25°C) - with wake-up sources including LPUART, RTC alarm, and GPIO interrupts.

Key Specifications

Pinout & Package

48-pin QFN package (7 mm × 7 mm, wettable flank), RoHS-compliant, with exposed thermal pad. Pinout conforms to K20 Sub-Family Signal Multiplexing Table (Rev. 4, Section 8.1), supporting up to 42 GPIOs with configurable pull-ups/pull-downs, multiple UART/SPI/I²C instances, and dedicated USB DP/DM pins.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MK20DX128VFT5, MK20DN128VFT5 reduces system cost by removing FlexMemory but sacrifices on-chip data retention flexibility; MK20DX256VLH7 increases scalability at the expense of board area and power budget - making MK20DX128VFT5 the optimal balance for mid-tier industrial edge nodes.

Availability

MK20DX128VFT5 is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, USB human interface devices, and automotive body electronics requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MK20DX128VFT5 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 roots in Freescale's Kinetis portfolio.

The MK20DX128VFT5 belongs to the Kinetis K20 family - designed specifically for cost-sensitive, low-power embedded applications demanding real-time performance, mixed-signal integration, and robust operation in harsh environments.

FAQ

What is the maximum operating frequency of the MK20DX128VFT5?

The MK20DX128VFT5 operates at a maximum core/system clock frequency of 50 MHz. This is achieved using the internal PLL with an external 3–32 MHz crystal or the internal FLL. The USB module requires the system clock to be ≥20 MHz and ≤48 MHz for full-speed operation, and the flash clock must not exceed 25 MHz for reliable read/write operations. All timing specifications in the datasheet assume this 50 MHz configuration.

Does the MK20DX128VFT5 support USB device mode without an external PHY?

Yes, the MK20DX128VFT5 includes a full-speed USB OTG controller with an integrated transceiver, enabling direct connection to a USB host or peripheral without an external PHY chip. It supports USB device, host, and OTG roles. The USB_DP and USB_DM pins are routed internally to the transceiver, and only standard series resistors (27 Ω) and a 1.5 kΩ pull-up on DP (for device mode) are required on the PCB.

How much FlexMemory does the MK20DX128VFT5 provide, and how is it allocated?

The MK20DX128VFT5 provides up to 32 KB of FlexNVM and 2 KB of FlexRAM. FlexNVM can be partitioned as program flash or data flash (for EEPROM emulation), while FlexRAM serves as fast, nonvolatile RAM that retains data across power cycles. Allocation is configured at runtime via the Flash Configuration Field (FCFG) and controlled by the FLEXRAMCTRL register - no hardware modification is needed to reassign capacity between code and data storage.

What low-power modes are available on the MK20DX128VFT5, and what is the lowest current draw?

The MK20DX128VFT5 supports seven low-power modes: RUN, WAIT, VLPR, STOP, VLPS, LLS, and VLLS0–VLLS3. The lowest active current is 0.176 µA in VLLS0 mode (with POR detect disabled) at –40°C to 25°C. In VLLS3 mode, it draws 1.5 µA under the same conditions. Wake-up sources include GPIO, RTC alarm, LPUART, and comparator output - all configurable independently per mode.

Is the MK20DX128VFT5 pin-compatible with other K20 family members?

The MK20DX128VFT5 uses the 48-pin QFN (FT) package and shares identical pinout with other K20 devices in the same package variant - including MK20DN128VFT5, MK20DX64VFT5, and MK20DN64VFT5. Signal mapping, power/ground pin locations, and USB/oscillator pin positions are consistent across these parts. However, peripheral enablement and feature availability (e.g., FlexMemory) differ, so firmware must be validated for the specific variant.