NXP Semiconductors MKL17Z256VLH4

Overview

MKL17Z256VLH4 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 54 GPIOs in a 64-pin LQFP package - deployed in portable medical sensors and smart utility meters.

For engineers reviewing the MKL17Z256VLH4 datasheet, MKL17Z256VLH4 pinout, MKL17Z256VLH4 application, or MKL17Z256VLH4 equivalent, key selection criteria include its integrated FlexIO for custom serial peripheral emulation, dual low-power UARTs enabling always-on communication in sleep states, and factory-trimmed 48 MHz internal clock with ±0.5% accuracy across temperature.

Technical Context

The MKL17Z256VLH4 implements an ARM Cortex-M0+ core with Micro Trace Buffer and Bit Manipulation Engine, paired with a multi-layer bus architecture supporting concurrent DMA transfers across peripherals. Its MCG-Lite clock system integrates HIRC (48 MHz ±0.5%), LIRC (8/2 MHz), and external crystal support (32 kHz–32 MHz), enabling precise low-power timing control.

Peripherals include one 16-bit 818 ksps ADC with internal Vref, two 16-bit SPIs (24 Mbit/s), two I²C modules (1 Mbit/s), one I²S interface, and a FlexIO module capable of emulating UART, IrDA, PWM, or I²C - all operable in VLPR, VLPW, and STOP modes with configurable wake-up sources.

Key Specifications

Pinout & Package

Package: 64-pin LQFP (10 mm × 10 mm, 0.5 mm pitch, 1.6 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 STM32L072KBU6 and EFM32PG12B500F1024GL125, the MKL17Z256VLH4 uniquely balances ultra-low deep-sleep current (1.96 µA), on-chip bootloader, and FlexIO-driven peripheral adaptability - making it optimal for cost-sensitive, battery-powered endpoints requiring long-term firmware maintainability and mixed-interface connectivity.

Availability

MKL17Z256VLH4 is available at Aetrix Electronics and suitable for portable medical sensors, smart utility meters, industrial temperature monitoring, and wireless HVAC actuators requiring stable component supply across multi-year production cycles.

Supply support for MKL17Z256VLH4 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 markets, with R&D centers in 25+ countries and ISO 9001-certified manufacturing.

The Kinetis KL17 family targets cost-sensitive, battery-powered general-purpose connectivity applications - emphasizing ultra-low-power operation, flexible peripheral emulation, and simplified certification through integrated security and clock accuracy.

FAQ

What is the maximum operating temperature rating for the MKL17Z256VLH4?

The MKL17Z256VLH4 is rated for operation from –40°C to +105°C, validated for use in industrial environments including automotive cabin modules and HVAC control units. This extended temperature range applies specifically to the 64-LQFP package variant and is confirmed in Table 4 of the Rev. 7 datasheet. The MKL17Z256VLH4 maintains full functionality - including ADC linearity, clock accuracy, and Flash write endurance - across this entire range.

Does the MKL17Z256VLH4 support USB device functionality?

No, the MKL17Z256VLH4 does not include a USB controller or physical transceiver. It supports UART, I²C, SPI, I²S, and FlexIO-based serial interfaces, but USB connectivity requires an external USB-to-UART bridge IC or a different Kinetis family member such as the KL27. The MKL17Z256VLH4's ROM bootloader uses UART or SWD for firmware updates - not USB HID or CDC classes.

How many ADC channels does the MKL17Z256VLH4 support, and what is the resolution?

The MKL17Z256VLH4 integrates a single 16-bit successive approximation register (SAR) ADC module with up to 20 single-ended or 4 differential input channels. It achieves 818 ksps sampling rate and includes an internal 1.2 V voltage reference, enabling high-precision sensor measurements without external reference components. This ADC configuration is fixed for the MKL17Z256VLH4 and documented in Section 3.6.1 of the datasheet.

Can the MKL17Z256VLH4 operate without an external crystal?

Yes, the MKL17Z256VLH4 can operate fully without any external crystal. Its MCG-Lite clock system provides factory-trimmed internal oscillators: 48 MHz HIRC (±0.5%), 8 MHz LIRC (±3%), and 2 MHz LIRC (±3%). These meet timing requirements for UART, SPI, I²C, and RTC - eliminating BOM cost and board space for crystals in cost-sensitive designs. The MKL17Z256VLH4 retains all low-power modes and peripheral functionality using only internal clocks.

What debug interface does the MKL17Z256VLH4 use, and how many pins are required?

The MKL17Z256VLH4 uses a two-pin Serial Wire Debug (SWD) interface - SWD_CLK and SWD_DIO - supporting full programming, breakpoint setting, and real-time variable inspection. No JTAG header is needed, and no additional reset or power pins are required for debug connection. This minimal interface reduces test point count and simplifies PCB layout for production programming and field diagnostics of the MKL17Z256VLH4.