NXP Semiconductors MK12DX256VLF5

Overview

MK12DX256VLF5 from NXP Semiconductors (formerly Freescale) is a 32-bit ARM Cortex-M4 microcontroller with DSP extensions, designed for embedded control in industrial and automotive applications. It operates at up to 50 MHz, features 256 KB program flash, 64 KB RAM, and supports -40°C to +105°C ambient operation with 1.71–3.6 V supply voltage.

For engineers reviewing the MK12DX256VLF5 datasheet, MK12DX256VLF5 pinout, MK12DX256VLF5 application, or MK12DX256VLF5 equivalent, key selection considerations include its FlexMemory architecture (64 KB FlexNVM + 4 KB FlexRAM), integrated 16-bit SAR ADC, dual 2-channel general-purpose timers with quadrature decode, USB Device Charger Detect, and low-power modes down to 0.36 µA in VLLS0 (POR enabled).

Technical Context

The MK12DX256VLF5 implements an ARM Cortex-M4 core with hardware DSP instructions and single-cycle MAC, paired with a multi-purpose clock generator supporting crystal oscillators (3–32 MHz and 32 kHz), internal reference, and programmable PLL. Its memory subsystem includes unified flash with FlexNVM partitioning, enabling EEPROM-like emulation via 64 KB FlexNVM and data retention in 4 KB FlexRAM.

System-level integration includes a 16-channel DMA controller servicing 63 request sources, hardware CRC module for fast integrity checking, 128-bit unique chip ID, and comprehensive low-power management with seven distinct power modes - including VLLS0/VLLS1 with wake-up from ultra-low leakage states using the low-leakage wakeup unit and external watchdog monitor.

Key Specifications

Pinout & Package

Package: 48-pin LQFP (7 mm × 7 mm), RoHS-compliant, moisture sensitivity level 3 (MSL3).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MK12DX256VLF5, MK12DN256VLF5 removes FlexMemory capability while retaining identical timing, power, and interface compatibility - making it a cost-optimized alternative for fixed-function applications. K22FN512VLH12 offers higher compute throughput and memory but demands layout changes and software adaptation due to architectural divergence.

Availability

MK12DX256VLF5 is available at Aetrix Electronics and suitable for industrial automation, automotive body electronics, and smart energy metering requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for MK12DX256VLF5 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 applications, with roots in Freescale's Kinetis portfolio.

The MK12DX256VLF5 belongs to the Kinetis K12 sub-family, engineered for cost-sensitive, thermally demanding embedded control applications requiring robust analog integration, deterministic real-time performance, and scalable low-power operation.

FAQ

What is the maximum operating frequency of the MK12DX256VLF5?

The MK12DX256VLF5 operates at a maximum system and core clock frequency of 50 MHz, as specified in the device clock specifications table of the K12 Sub-Family Data Sheet (Rev. 4). This frequency is supported across the full operating voltage range (1.71–3.6 V) and temperature range (–40°C to +105°C), with flash clock limited to 25 MHz for reliable execution.

Does the MK12DX256VLF5 include hardware encryption or secure boot features?

The MK12DX256VLF5 does not integrate dedicated cryptographic accelerators or secure boot ROM. It provides a 128-bit unique identification number per chip and hardware CRC-32/16 for data integrity checks, but lacks AES, SHA, or trusted execution environment capabilities. Secure boot implementation requires external components or software-based verification using the CRC module and flash protection registers.

What package type and pin count does the MK12DX256VLF5 use?

The MK12DX256VLF5 uses a 48-pin LQFP package (7 mm × 7 mm), identified by the "LF" suffix in its part number per the K12 naming convention. This package is RoHS-compliant, rated MSL3, and features exposed pad thermal enhancement - confirmed in Section 2.3 (Fields) and Package Identifier table of the K12 Sub-Family Data Sheet.

Can the MK12DX256VLF5 operate from a single 3.3 V supply for both digital and analog domains?

Yes, the MK12DX256VLF5 supports single-supply operation: VDD and VDDA may be tied together at 3.3 V, provided the differential voltage between them remains within ±0.1 V (per Table 1, VDD–VDDA specification). This simplifies power design in space-constrained applications while maintaining ADC accuracy and comparator stability.

How much FlexNVM and FlexRAM does the MK12DX256VLF5 provide?

The MK12DX256VLF5 provides 64 KB of FlexNVM and 4 KB of FlexRAM, as explicitly stated in the "Memories and memory interfaces" section of the K12 Sub-Family Data Sheet. These resources are architecturally distinct from main program flash and enable EEPROM-like wear leveling, atomic writes, and data retention during power loss - confirmed for this exact part number in the ordering row context.