NXP Semiconductors MK20DN128VFM5

Overview

MK20DN128VFM5 from NXP (formerly Freescale) is a 32-bit ARM Cortex-M4 core microcontroller with DSP extensions, designed for embedded control applications requiring real-time signal processing and low-power operation. It delivers 1.25 Dhrystone MIPS/MHz at up to 50 MHz, integrates 128 KB program flash, 16 KB RAM, and operates across –40°C to +105°C in industrial motor control systems.

For engineers reviewing the MK20DN128VFM5 datasheet, MK20DN128VFM5 pinout, MK20DN128VFM5 application, or MK20DN128VFM5 equivalent, key selection considerations include its FlexMemory-free configuration (flash-only), 32-pin QFN package, USB On-The-Go support, and verified low-leakage stop modes down to 0.176 µA in VLLS0 mode with POR disabled.

Technical Context

The MK20DN128VFM5 implements an ARM Cortex-M4 core with hardware DSP instructions and no FPU. Its clock system includes dual oscillators (3–32 MHz main, 32 kHz RTC), MCG multipurpose clock generator, and supports multiple low-power modes including VLLS0–VLLS3 with sub-µA retention. The device uses a fixed flash-only memory map-no FlexNVM or FlexRAM-distinguishing it from X-suffix variants.

Peripheral integration includes a 16-bit SAR ADC, two analog comparators with integrated 6-bit DACs, eight-channel PWM timer, quadrature decoder, RTC, and full-speed USB OTG with on-chip transceiver. All I/O pins support configurable slew rate, drive strength, and internal pull-ups/pull-downs (22–50 kΩ), with digital supply voltage range of 1.71–3.6 V.

Key Specifications

Pinout & Package

32-pin QFN (5 mm × 5 mm, 0.5 mm pitch), wettable flank, RoHS-compliant. Exposed thermal pad (EP) connected to VSS for enhanced thermal dissipation in high-duty-cycle applications.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MK20DX128VFM5, MK20DN128VFM5 trades FlexMemory capability for lower unit cost and simpler memory management; versus MK20DN64VFM5, it doubles flash for complex control algorithms or bootloader+application separation-both alternatives share identical 32-QFN packaging and low-power behavior.

Availability

MK20DN128VFM5 is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, and USB human interface devices requiring stable component supply across extended product lifecycles.

Supply support for MK20DN128VFM5 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 Kinetis K20 family, including MK20DN128VFM5, was engineered for cost-sensitive industrial control applications demanding robust real-time performance, integrated analog peripherals, and certified low-power operation across extended temperature ranges.

FAQ

What is the maximum operating frequency of the MK20DN128VFM5?

The MK20DN128VFM5 operates at a maximum system and core clock frequency of 50 MHz. This is achieved using the internal MCG clock generator in FEI or PEE mode with a supported crystal or external clock source. At this speed, the ARM Cortex-M4 core delivers 1.25 Dhrystone MIPS per MHz, enabling deterministic execution of real-time control algorithms. The MK20DN128VFM5 maintains full peripheral functionality-including USB, ADC, and timers-at 50 MHz.

Does the MK20DN128VFM5 include FlexMemory (FlexNVM/FlexRAM)?

No, the MK20DN128VFM5 does not include FlexMemory. The 'N' in the part number explicitly denotes "program flash only", distinguishing it from 'X' variants like MK20DX128VFM5 which integrate 32 KB FlexNVM and 2 KB FlexRAM. Therefore, MK20DN128VFM5 provides 128 KB of standard program flash and 16 KB of SRAM only, with no EEPROM emulation or data logging capability built into the memory subsystem.

What package type and pin count does the MK20DN128VFM5 use?

The MK20DN128VFM5 uses a 32-pin QFN package (5 mm × 5 mm, 0.5 mm pitch), identified by the 'FM' suffix in the part number. This RoHS-compliant, wettable flank package includes an exposed thermal pad (EP) connected to VSS. Pin assignments follow the K20 Sub-Family pinout specification, with dedicated functions for USB_DP/DM, EXTAL/XTAL, RTC_CLKIN, and 28 general-purpose I/O pins distributed across Port A.

Can the MK20DN128VFM5 operate in USB device mode without an external transceiver?

Yes, the MK20DN128VFM5 integrates a full-speed USB 2.0 On-The-Go controller with an on-chip transceiver. It supports both device and host roles without requiring external PHY components. For device-mode operation, only a 1.5 kΩ pull-up resistor on USB_DP is needed for enumeration. The internal transceiver meets USB electrical specifications across the full 1.71–3.6 V supply range and supports suspend/resume detection and battery charging detection (BCD) protocol extensions.

What is the lowest achievable current consumption in stop mode for the MK20DN128VFM5?

The lowest confirmed current consumption for the MK20DN128VFM5 is 0.176 µA in Very-Low-Leakage Stop Mode 0 (VLLS0) with the POR detect circuit disabled, measured at –40°C to +25°C ambient and 3.0 V supply. This mode retains RAM and register contents while disabling all clocks except the 32 kHz RTC oscillator. Achieving this value requires proper configuration of the SMC_PMPROT and SMC_PMCTRL registers, VLLS0 entry via WFI/WFE, and disabling the POR circuit using PMC_REGSC[BIASEN] and PMC_LVDSC1[LVDRE].