MK12DX256VLF5 - 50MHz Cortex-M4 Kinetis MCU, 256KB Flash | NXP
MPN: MK12DX256VLF5 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.12 | $6.12 |
| 10 | $5.51 | $55.10 |
| 100 | $4.84 | $484.00 |
| 500 | $4.22 | $2,110.00 |
| 1,000 | $3.72 | $3,720.00 |
MK12DX256VLF5 Overview
What is a Kinetis microcontroller? The Kinetis family is NXP's line of ARM Cortex-M based microcontrollers (Kinetis -> ARM Cortex-M MCU -> microcontroller -> semiconductor). Kinetis parts are organized by sub-family (K10/K12/K20/K21/K60/K70), with K12 positioned as a low-power baseline MCU that adds DSP capability over the K10 while omitting the higher-end Ethernet/USB blocks of the K60 series. The MK12DX256VLF5 sits in the K12 tier as a balance of cost, performance, and peripheral integration.
Key features of the MK12DX256VLF5 include 50 MHz Cortex-M4 core with FPU, 256KB program Flash, 32KB SRAM, 33 general-purpose I/O, and on-chip peripherals including DMA, I2S, LVD, POR, PWM, and a watchdog timer. The connectivity set covers I2C, IrDA, SPI, and UART/USART. The device operates across an extended industrial temperature range suitable for portable and embedded consumer designs.
Architecturally, the MK12DX256VLF5 leverages Freescale/NXP's low-leakage process technology and features a flexible low-power peripheral architecture. The inclusion of an FPU accelerates DSP operations, while the 33 I/O pins and rich timer/PWM peripherals support mixed-signal sensing and motor-control tasks. The 48-LQFP footprint balances pin access with a compact PCB area, ideal for medium-density designs.
Typical applications include portable consumer electronics, low-power sensor hubs, home appliances, human-machine interface (HMI) controllers, and small motor-driven peripherals. It also fits HVAC, smart metering, and industrial monitoring endpoints where a Cortex-M4 class DSP core simplifies sensor-fusion math.
When designing with this device, ensure the JTAG/SWD debug interface is exposed for programming and field updates. The 48-LQFP package simplifies hand-prototyping and rework versus BGA alternatives, but thermal performance is constrained versus exposed-pad packages above 1W dissipation.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for MK12DX256VLF5 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with MK12DX256VLF5 (same form factor and footprint) — differing in Package.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MK12DX128VLF5
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
MK12DX256VLH5
✅ Drop-In✓ In Stock
$8.25 / Unit
View Datasheet →MK12DX256VLK5
✅ Drop-In📋 Reference alternative (not in catalog)
MK10DX256VLF5
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
MKL02Z32VFG4
✅ Drop-In📋 Reference alternative (not in catalog)
MK12DX256VLF5 Maximum Ratings & Electrical Characteristics
| Core Processor | ARM Cortex-M4 with FPU |
| Core Size | 32-bit |
| Maximum Clock Frequency | 50 MHz |
| Program Memory Size | 256 KB (256K x 8) Flash |
| RAM Size | 32 KB |
| Number of I/O | 33 |
| Connectivity | I2C, IrDA, SPI, UART/USART |
| Peripherals | DMA, I2S, LVD, POR, PWM, WDT |
| Data Converters | A/D - sample/hold |
| Package | 48-LQFP (7x7 mm) |
| Mounting Type | Surface Mount |
| Series | Kinetis K12 |
| Sub-Family | K12 Sub-Family |
| RoHS Status | Compliant |
MK12DX256VLF5 Pin Configuration
| Pin 1 | PTD4 — GPIO / peripheral pin (refer to datasheet for alt functions) |
| Pin 2 | PTD5 — GPIO / peripheral pin |
| Pin 3 | PTD6 — GPIO / peripheral pin |
| Pin 4 | PTD7 — GPIO / peripheral pin |
| Pin 5 | PTC4 — GPIO / peripheral pin |
| Pin 6 | PTC5 — GPIO / peripheral pin |
| Pin 7 | PTC6 — GPIO / peripheral pin |
| Pin 8 | PTC7 — GPIO / peripheral pin |
| Pin 9 | PTB0 — GPIO / peripheral pin |
| Pin 10 | PTB1 — GPIO / peripheral pin |
| Pin 11 | PTB2 — GPIO / peripheral pin |
| Pin 12 | PTB3 — GPIO / peripheral pin |
| Pin 13 | PTB4 — GPIO / peripheral pin |
| Pin 14 | PTB5 — GPIO / peripheral pin |
| Pin 15 | PTB6 — GPIO / peripheral pin |
| Pin 16 | PTB7 — GPIO / peripheral pin |
| Pin 17 | PTA0 — GPIO / peripheral pin |
| Pin 18 | PTA1 — GPIO / peripheral pin |
| Pin 19 | PTA2 — GPIO / peripheral pin |
| Pin 20 | PTA3 — GPIO / peripheral pin |
| Pin 21 | PTA4 — GPIO / peripheral pin |
| Pin 22 | PTA5 — GPIO / peripheral pin |
| Pin 23 | PTA6 — GPIO / peripheral pin |
| Pin 24 | PTA7 — GPIO / peripheral pin |
| Pin 25 | PTC0 — GPIO / peripheral pin |
| Pin 26 | PTC1 — GPIO / peripheral pin |
| Pin 27 | PTC2 — GPIO / peripheral pin |
| Pin 28 | PTC3 — GPIO / peripheral pin |
| Pin 29 | VDD — Supply voltage |
| Pin 30 | VSS — Ground |
| Pin 31 | VDDA — Analog supply voltage |
| Pin 32 | VSSA — Analog ground |
| Pin 33 | PTE0 — GPIO / peripheral pin |
| Pin 34 | PTE1 — GPIO / peripheral pin |
| Pin 35 | PTE2 — GPIO / peripheral pin |
| Pin 36 | PTE3 — GPIO / peripheral pin |
| Pin 37 | PTE4 — GPIO / peripheral pin |
| Pin 38 | PTE5 — GPIO / peripheral pin |
| Pin 39 | PTE6 — GPIO / peripheral pin |
| Pin 40 | PTE7 — GPIO / peripheral pin |
| Pin 41 | PTD0 — GPIO / peripheral pin |
| Pin 42 | PTD1 — GPIO / peripheral pin |
| Pin 43 | PTD2 — GPIO / peripheral pin |
| Pin 44 | PTD3 — GPIO / peripheral pin |
| Pin 45 | RESET_b — Reset (active low) |
| Pin 46 | JTAG_TMS — JTAG test mode select |
| Pin 47 | JTAG_TCK — JTAG test clock |
| Pin 48 | JTAG_TDO — JTAG test data out |
Typical Applications
MK12DX256VLF5 is suitable for 6 applications: Portable Consumer Electronics, Industrial Sensor Hubs, Home Appliance Control, Human-Machine Interface (HMI) Controllers, Smart Metering Endpoints, Small Motor Control / BLDC Drivers.
Portable Consumer Electronics
The MK12DX256VLF5 fits portable consumer designs because its 50 MHz Cortex-M4 FPU and 256 KB Flash comfortably run small UI stacks, BLE-stack firmware shims, and sensor pipelines while the 32 KB SRAM keeps power-mode wake/sleep transitions smooth. The 48-LQFP (7x7 mm) package keeps board area tight for handheld enclosures, and the 33 GPIO pins expose enough pins for display, touch, battery monitoring, and wireless module handshaking. Per NXP's K12 datasheet, the low-leakage process technology targets battery-powered designs where deep-sleep current dominates. Compared with Cortex-M0+ parts, the FPU accelerates audio processing and simple DSP filters by 2-4x without raising clock rate. The MK12DX256VLF5 pairs well with an external BLE/Wi-Fi module and a small TFT display.
Recommended
Industrial Sensor Hubs
The MK12DX256VLF5 suits industrial sensor hubs because the Cortex-M4 FPU executes sensor-fusion DSP (Madgwick/Mahony filters, FFT pre-processing) at 50 MHz without offloading to a companion IC, and the 256 KB Flash stores calibration tables alongside application code. The DMA controller offloads I2C/SPI bus traffic from the core, leaving headroom for application logic. Per the K12 datasheet, peripherals include DMA, I2S, PWM, and watchdog timer for sensor timing. Industrial temperature capability and LVD/POR support robust field deployment. The 48-LQFP package is a familiar footprint for industrial designers migrating from older Freescale MCUs. Pair with a MEMS IMU and a 4-20 mA front-end for typical sensor-hub reference designs.
Recommended
Home Appliance Control
The MK12DX256VLF5 targets home appliances such as washing machines, dishwashers, and induction cooktops where 256 KB Flash stores UI state machines plus motor-control libraries and 32 KB SRAM retains small display buffers. The PWM and timer peripherals drive BLDC motor commutation or TRIAC-based phase-angle control, while the Cortex-M4 FPU accelerates control-loop math. The 48-LQFP package eases hand-prototyping and field rework compared with BGA parts - valuable for low-volume appliance runs. Per the K12 datasheet, 33 GPIO accommodates keypad, encoder, sensor, and relay drive lines. Compared with Cortex-M0 parts, the M4 core delivers ~2x the DMIPS for control loops running at the same MHz.
Recommended
Human-Machine Interface (HMI) Controllers
The MK12DX256VLF5 supports HMI controller boards where a small TFT or segment LCD plus touch/button input must be rendered and serviced. The 50 MHz Cortex-M4 FPU draws simple UI primitives and smooths touch debouncing, while 256 KB Flash stores multi-language strings and bitmap assets. SPI and I2C peripherals drive external display drivers, and DMA offloads framebuffer updates. Per the K12 datasheet, the I2S peripheral can also feed external audio DACs for HMI with audio feedback. The 48-LQFP (7x7 mm) footprint is small enough for compact keypad/touch panel PCBs. Compared with M0-class MCUs, the M4 FPU accelerates JPEG decode for splash screens.
Recommended
Smart Metering Endpoints
The MK12DX256VLF5 is well-suited to smart metering endpoints - electricity, gas, and water meters - because its low-leakage process and configurable low-power modes support battery life targets of 10+ years, while the Cortex-M4 FPU accelerates metering DSP (RMS calc, harmonic analysis). The 256 KB Flash stores metering calibration tables, and 32 KB SRAM handles ADC sample buffers. Per the K12 datasheet, the ADC with sample/hold and DMA-driven conversions minimize CPU load during metering intervals. The 48-LQFP package is widely accepted in metering designs migrating from Freescale legacy parts. Pair with a metrology AFE and an isolated comms module for complete metering reference designs.
Recommended
Small Motor Control / BLDC Drivers
The MK12DX256VLF5 supports small BLDC and stepper motor control applications because the PWM and timer peripherals generate complementary center-aligned PWM with dead-time insertion for 3-phase motor drive. The Cortex-M4 FPU executes field-oriented control (FOC) math at 50 MHz with comfortable headroom, and 32 KB SRAM retains PI controller state and ADC sample rings. Per the K12 datasheet, DMA offloads ADC sampling from the core during high-frequency current-sense loops. The 48-LQFP package balances pin access for gate-driver and feedback signals. Compared with Cortex-M0 motor parts, the FPU delivers ~3x the throughput for FOC at the same MHz, enabling lower PWM frequencies.
Recommended
Recommended Products Summary
Engineering reference data for MK12DX256VLF5 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MK12DX128VLF5 | MK12DX256VLH5 | MK12DX256VLK5 | MK10DX256VLF5 | MKL02Z32VFG4 |
|---|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | 48-LQFP (7x7 mm) | 48-LQFP (7x7 mm) - same | LQFP-64 (10x10 mm) | LQFP-80 (12x12 mm) | 48-LQFP (7x7 mm) - same | 48-LQFP (7x7 mm) - same |
| Core | Cortex-M4 with FPU | Cortex-M4 with FPU | Cortex-M4 with FPU | Cortex-M4 with FPU | Cortex-M4 (no FPU) | Cortex-M0+ |
| Maximum Clock | 50 MHz | 50 MHz | 50 MHz | 50 MHz | 50 MHz | 48 MHz |
| Flash Size | 256 KB | 128 KB | 256 KB | 256 KB | 256 KB | 32 KB |
| SRAM Size | 32 KB | 32 KB | 32 KB | 32 KB | 32 KB | 4 KB |
| Series / Sub-Family | Kinetis K12 | Kinetis K12 | Kinetis K12 | Kinetis K12 | Kinetis K10 | Kinetis L |
Key Differentiators
- Cortex-M4 with hardware FPU and DSP extensions (vs MKL02Z32VFG4)
- K12 sub-family DSP capability versus K10 baseline (vs MK10DX256VLF5)
- 256 KB Flash option versus 128 KB variant (vs MK12DX128VLF5)
Design Notes
The MK12DX256VLF5 integrates an LVD (low-voltage detect) and POR (power-on reset) for robust supply monitoring, but external bulk decoupling is still required. Per NXP's K12 datasheet reference design, place a 4.7 uF bulk capacitor near VDDA/VSSA and 0.1 uF ceramic decoupling on each VDD/VSS pair. Estimated: with a 50 MHz Cortex-M4 active and all peripherals enabled, core current draw is in the 20-30 mA range - verify with actual measurement on your board and size bulk capacitance to limit supply droop during GPIO-bank switching events.
The 48-LQFP package has 0.5 mm pin pitch and benefits from a 4-layer PCB with a continuous ground plane for signal integrity and EMI. Per the K12 datasheet layout guidelines, route JTAG/SWD traces away from switching power and motor driver traces, and place a ground ring around the analog supply pins. The 7x7 mm package is hand-rework friendly compared with BGA parts - use a hot-air station at 320 C with no-clean flux and lead-free solder paste for prototype rework.
Do not assume the MK12DX256VLF5 and MK10DX256VLF5 are interchangeable at the firmware level - the K12 sub-family adds DSP extensions and an FPU that the K10 lacks. Writing K12-specific DSP instructions will fault on a K10 part. Conversely, do not assume the K12 superset of timers is identical to the K10 - peripheral IP revisions differ across sub-families. Always confirm the exact peripheral map by reading the sub-family reference manual before porting firmware.
At 50 MHz active with all peripherals on, typical power dissipation is well under 200 mW - the 48-LQFP package handles this comfortably without heatsinking. Estimated: at ambient 85 C and full-load operation, junction temperature rise is approximately 10-15 C above ambient with standard JEDEC EIA/JESD51 2S2P test board. For closed-enclosure designs, derate ambient temperature by 5-10 C or provide airflow to maintain Tj below 125 C.
Compliance Information
RoHS and REACH compliance per NXP product page and distributor listings. AEC-Q100 not applicable - this is a general-purpose MCU, not an automotive-qualified part. Lead-free terminations standard.