NXP Semiconductors MKS20FN256VLL12

Overview

MKS20FN256VLL12 from NXP Semiconductors is a 120 MHz ARM® Cortex®-M4 microcontroller with 256 KB flash, 64 KB SRAM, and integrated USB FS OTG (crystal-less), FlexCAN (1 channel), and 16-bit ADC (17 SE/4 DP channels). It operates from 1.71–3.6 V across –40 to 105 °C and targets automotive body control, industrial sensor nodes, and CAN-based gateway applications.

For engineers reviewing the MKS20FN256VLL12 datasheet, MKS20FN256VLL12 pinout, MKS20FN256VLL12 application, or MKS20FN256VLL12 equivalent, key selection criteria include its single FlexCAN interface, 100-pin LQFP package with 66 GPIOs, 120 MHz FPU-enabled core, and support for low-power modes including VLPS and LLS with RTC and LPTMR wake-up capability.

Technical Context

This device implements an ARMv7-M architecture with Thumb-2 ISA, DSP extensions, and single-precision FPU - delivering 1.25 Dhrystone MIPS/MHz. Its MCG clock system supports multiple internal oscillators (32 kHz, 4 MHz, 48 MHz) and external crystals (3–32 MHz), enabling flexible PLL/FLL-based clock generation up to 120 MHz for core and 60 MHz for bus domains.

The MCU integrates a 16-channel eDMA controller, NVIC with 240 vectors and 16 priority levels, and AWIC/LLWU for multi-level wake-up from Stop, VLPS, and LLS modes. Peripheral clock gating and independent power domains (e.g., RTC, VBAT) ensure deterministic low-power operation while retaining critical analog and timing functions.

Key Specifications

Pinout & Package

Package: 100-pin LQFP (14 × 14 × 1.7 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 MKS22FN256VLL12 and S32K144HAT0MLHT, the MKS20FN256VLL12 offers optimal cost-performance balance for non-safety-critical CAN 2.0B applications, with identical 100-LQFP footprint and full peripheral compatibility except for the second CAN channel - simplifying migration from legacy Kinetis platforms.

Availability

MKS20FN256VLL12 is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor gateways, and smart building HVAC controllers requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for MKS20FN256VLL12 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 applications, with deep expertise in ARM-based microcontrollers and automotive-grade reliability.

The KS20 product line delivers high-integration, low-power ARM Cortex-M4 MCUs optimized for cost-sensitive automotive body electronics and industrial control - emphasizing CAN interface robustness, analog precision, and extended temperature operation.

FAQ

What is the maximum operating frequency of the MKS20FN256VLL12 core?

The MKS20FN256VLL12 features an ARM Cortex-M4 core rated for 120 MHz operation with single-precision floating-point unit and DSP extensions. This frequency is achievable across the full –40 to 105 °C temperature range when supplied with 1.71–3.6 V, and delivers 1.25 Dhrystone MIPS per MHz as measured per industry-standard methodology.

Does the MKS20FN256VLL12 support crystal-less USB operation?

Yes, the MKS20FN256VLL12 integrates a USB FS/LS OTG 2.0 controller with on-chip transceiver and crystal-less functionality. It uses the internal 48 MHz IRC48M oscillator as the USB clock source, eliminating the need for an external 48 MHz crystal and associated passive components - reducing BOM cost and PCB footprint in the MKS20FN256VLL12 design.

How many CAN interfaces does the MKS20FN256VLL12 include?

The MKS20FN256VLL12 includes one FlexCAN module compliant with ISO 11898-1 and CAN 2.0B protocol specifications. This is explicitly confirmed in the datasheet's ordering table and functional block diagram, distinguishing it from the KS22 variant which provides two CAN channels. The MKS20FN256VLL12 CAN interface supports message buffering, ID filtering, and wake-on-CAN in low-power modes.

What analog peripherals are integrated into the MKS20FN256VLL12?

The MKS20FN256VLL12 integrates a 16-bit SAR ADC with up to 17 single-ended or 4 differential input channels, a 12-bit DAC, and an analog comparator (CMP) with 6-bit DAC output. All analog modules operate across the full –40 to 105 °C range and support low-power modes - for example, the ADC remains functional in Stop mode when clocked by the 4 MHz IRC.

Is the MKS20FN256VLL12 pin-compatible with other KS20 or KS22 variants?

The MKS20FN256VLL12 is pin-compatible with other 100-pin LQFP KS20/KS22 devices (e.g., MKS20FN128VLL12, MKS22FN256VLL12) sharing the VLL12 suffix. Pin assignments for power, reset, clocks, GPIO, ADC, CAN, and USB are identical across this package variant - enabling hardware reuse when migrating between flash sizes or KS20/KS22 families, provided software accounts for peripheral differences like the second CAN channel.