NXP Semiconductors MKL04Z16VFK4

Overview

MKL04Z16VFK4 from NXP Semiconductors (formerly Freescale) is a 32-bit ARM Cortex-M0+ microcontroller in a 24-pin QFN package, delivering up to 48 MHz operation with 16 KB Flash and 2 KB SRAM. It features ultra-low-power run mode (45 μA/MHz), 2 μA static current with full state retention, and integrated peripherals including 12-bit SAR ADC, I²C, SPI, UART, six-channel TPM, and real-time clock - deployed in battery-powered sensor nodes and portable medical devices.

For engineers reviewing the MKL04Z16VFK4 datasheet, MKL04Z16VFK4 pinout, MKL04Z16VFK4 application, or MKL04Z16VFK4 equivalent, key selection criteria include its 24-pin QFN footprint, -40°C to +105°C industrial temperature range, 1.71–3.6 V supply, nine low-power modes, and support for SWD debug with Micro Trace Buffer.

Technical Context

The MKL04Z16VFK4 implements an ARM Cortex-M0+ core with Bit Manipulation Engine and zero-wait-state flash controller, paired with a multi-source clock system including 32 kHz–40 kHz and 3–32 MHz crystal oscillators, internal 4 MHz/32 kHz IRC, and LPO. Its power architecture integrates clock gating, dynamic voltage scaling, and nine configurable low-power modes (VLLS0–VLPS, STOP, WAIT).

Peripheral integration includes a 12-bit SAR ADC with programmable reference, analog comparator with embedded 6-bit DAC, four-channel DMA, COP watchdog, low-leakage wakeup unit, and human-machine interface support for up to 22 GPIOs - all optimized for energy-constrained embedded control where fast wake-up (<4.4 μs from VLPS) and sub-μA retention are critical.

Key Specifications

Pinout & Package

24-pin QFN (VFK4), 4 mm × 4 mm × 1 mm, 0.5 mm pitch, exposed thermal pad. 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 STM32L011K4T6 and EFM32ZG108F16, the MKL04Z16VFK4 uniquely balances minimal 24-pin QFN size, integrated analog comparator with DAC, and production-ready Kinetis toolchain support - making it optimal for cost-sensitive, space-constrained industrial sensors requiring self-contained signal conditioning.

Availability

MKL04Z16VFK4 is available at Aetrix Electronics and suitable for wireless sensor nodes, portable medical monitors, smart building controllers, industrial asset trackers, and battery-powered IoT edge devices requiring stable component supply across long product lifecycles.

Supply support for MKL04Z16VFK4 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 markets, with deep expertise in ARM-based microcontrollers and edge processing.

The MKL04Z16VFK4 belongs to the Kinetis KL04 family - designed specifically for ultra-low-power, cost-sensitive embedded control applications where small form factor, extended battery life, and integrated analog functionality are essential.

FAQ

What is the maximum operating frequency of the MKL04Z16VFK4?

The MKL04Z16VFK4 operates at a maximum core frequency of 48 MHz using the ARM Cortex-M0+ processor. This speed is achievable in normal run mode with the MCG configured in FBE (FLL Bypassed External) mode and external crystal oscillator. In very-low-power run (VLPR) mode, the maximum core frequency is reduced to 4 MHz to maintain sub-milliamp current draw while retaining full functionality.

Does the MKL04Z16VFK4 support hardware debugging?

Yes, the MKL04Z16VFK4 supports Serial Wire Debug (SWD) via dedicated SWD_CLK and SWD_DIO pins. It includes a Micro Trace Buffer for real-time instruction trace and full debug visibility using standard ARM-compliant tools like SEGGER J-Link and NXP's S32DS. No external debug adapter is required beyond a two-wire connection.

What analog peripherals are integrated into the MKL04Z16VFK4?

The MKL04Z16VFK4 integrates a 12-bit SAR ADC with programmable reference input, an analog comparator (CMP) with embedded 6-bit DAC, and bandgap voltage reference. These enable direct sensor signal acquisition, threshold detection, and closed-loop analog control - eliminating need for external op-amps or DACs in many low-complexity monitoring applications.

How many low-power modes does the MKL04Z16VFK4 support, and what is the lowest current draw?

The MKL04Z16VFK4 supports nine distinct low-power modes, including VLLS0 (Very-Low-Leakage Stop Mode 0). In VLLS0 with PORPO = 1, it achieves 0.45 µA typical current draw at 25°C while retaining full RAM and register state - enabling wake-up in under 4.4 μs with no boot delay, ideal for interrupt-driven sensor applications.

Is the MKL04Z16VFK4 pin-compatible with other Kinetis KL04 variants?

Yes, the MKL04Z16VFK4 shares the same 24-pin QFN (VFK4) package and pinout with MKL04Z8VFK4 and MKL04Z32VFK4. All three variants are functionally and electrically compatible at the board level - allowing memory-scaling upgrades without PCB redesign, provided firmware accommodates differing Flash/SRAM sizes.