NXP Semiconductors MKL17Z256VFT4R

Overview

MKL17Z256VFT4R from NXP Semiconductors is a 48 MHz ARM® Cortex®-M0+ microcontroller with 256 KB flash, 32 KB SRAM, and 16 KB ROM bootloader, designed for ultra-low-power battery-operated systems. It delivers 54 µA/MHz in very low power run mode, 1.96 µA in VLLS3 deep-sleep mode (RAM + RTC retained), and supports up to 40 GPIOs in a 48-pin QFN package - deployed in portable medical sensors and smart utility meters.

For engineers reviewing the MKL17Z256VFT4R datasheet, MKL17Z256VFT4R pinout, MKL17Z256VFT4R application, or MKL17Z256VFT4R equivalent, key selection criteria include its integrated FlexIO for custom serial peripheral emulation, dual low-power UARTs enabling always-on communication, 16-channel 12-bit ADC with internal Vref, and verified operation across –40 °C to 105 °C in 48-QFN packaging.

Technical Context

The MKL17Z256VFT4R implements an ARM Cortex-M0+ core with Micro Trace Buffer and bit manipulation engine, paired with a multi-mode clock system featuring factory-trimmed 48 MHz HIRC (±0.5%), 8/2 MHz IRC, and 32 kHz–32 MHz crystal support. Its power architecture includes six static low-power modes - VLLS0 through VLPS - with sub-µA retention states enabled by dedicated LPO and RTC circuitry.

Peripherals are organized around flexible routing: two I²C modules (up to 1 Mbit/s), two SPI (24 Mbit/s), one UART (1.5 Mbit/s) plus two low-power UARTs, FlexIO for runtime-configurable serial emulation (UART/IrDA/SPI/I²C/I²S/PWM), 16-bit ADC (818 ksps), 12-bit DAC, and high-speed analog comparator with 6-bit DAC reference. All operate within 1.71–3.6 V supply range.

Key Specifications

Pinout & Package

Package: 48-pin QFN (7 mm × 7 mm, 0.5 mm pitch, 0.65 mm height), 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 MKL27Z256VLH4 and STM32L072KBU6, MKL17Z256VFT4R uniquely balances ultra-compact 48-QFN packaging, integrated FlexIO for legacy protocol bridging, and production-ready ROM bootloader - making it the most direct fit for battery-powered edge nodes where board area, firmware security, and interface adaptability are jointly critical.

Availability

MKL17Z256VFT4R is available at Aetrix Electronics and suitable for portable medical sensors, smart utility meters, industrial remote I/O nodes, and asset tracking beacons requiring stable component supply across extended product lifecycles.

Supply support for MKL17Z256VFT4R 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 over 40 years of microcontroller innovation.

The Kinetis KL17 series targets cost-sensitive, battery-powered general-purpose connectivity applications - emphasizing ultra-low-power operation, flexible peripheral routing, and simplified firmware maintenance through embedded ROM bootloaders.

FAQ

What is the maximum operating frequency and core architecture of the MKL17Z256VFT4R?

The MKL17Z256VFT4R features an ARM Cortex-M0+ core rated for up to 48 MHz operation. Its architecture includes Micro Trace Buffer for instruction trace, bit manipulation engine for efficient register-level control, and NVIC with 32 interrupt vectors. This enables deterministic real-time response in applications such as sensor fusion and motor control loops, with the MKL17Z256VFT4R delivering consistent performance across its full –40 °C to 105 °C temperature range.

Does the MKL17Z256VFT4R support in-system programming without external debug hardware?

Yes, the MKL17Z256VFT4R includes 16 KB of ROM containing a factory-programmed bootloader that supports UART, I²C, and SPI-based firmware updates. This allows field upgrades without JTAG/SWD debug probes - the MKL17Z256VFT4R can be reprogrammed directly via its communication peripherals using standard serial interfaces, reducing service costs and enabling secure OTA deployment.

What low-power modes are available on the MKL17Z256VFT4R, and what is the lowest achievable current draw?

The MKL17Z256VFT4R offers six low-power modes: RUN, WAIT, STOP, VLPS, LLS, and three VLLS variants. The lowest current is 1.96 µA in VLLS3 mode with RAM and RTC retained at 3.0 V and 25 °C. This makes the MKL17Z256VFT4R ideal for applications requiring long-term data retention and periodic wake-up - such as environmental loggers or tamper-detection circuits - where minimizing quiescent current is essential.

Can the MKL17Z256VFT4R emulate custom serial protocols, and how is this implemented?

Yes, the MKL17Z256VFT4R integrates a FlexIO module that provides fully programmable shift registers, timers, and state machines to emulate UART, IrDA, SPI, I²C, I²S, PWM, and other serial protocols in software-defined fashion. This capability is implemented entirely in hardware - the MKL17Z256VFT4R offloads protocol generation from the CPU, enabling concurrent operation with minimal resource overhead and eliminating the need for external bridge ICs.

What is the ADC specification of the MKL17Z256VFT4R, and does it include an internal reference?

The MKL17Z256VFT4R includes a 16-channel, 12-bit successive approximation ADC with up to 818 ksps sampling rate and built-in high-accuracy internal voltage reference (Vref). This internal Vref eliminates dependency on external references and ensures ±1 LSB integral nonlinearity across temperature - a key advantage for the MKL17Z256VFT4R in portable instrumentation where board space and calibration stability are critical.