NXP Semiconductors MKL04Z8VFK4

Overview

MKL04Z8VFK4 from NXP Semiconductors (formerly Freescale) is an ARM Cortex-M0+ based 32-bit microcontroller optimized for ultra-low-power embedded applications. It operates at up to 48 MHz, integrates 8 KB flash and 1 KB SRAM, supports 22 GPIOs, and delivers run current as low as 213 µA in very-low-power run mode at 3.0 V - ideal for battery-powered sensor nodes and portable medical devices.

For engineers reviewing the MKL04Z8VFK4 datasheet, MKL04Z8VFK4 pinout, MKL04Z8VFK4 application, or MKL04Z8VFK4 equivalent, key selection criteria include its 24-pin QFN package, -40°C to +105°C operating range, integrated 12-bit SAR ADC with analog comparator, low-power UART/I²C/SPI interfaces, and nine configurable low-power modes including VLLS0 with 0.3 µA typical current draw.

Technical Context

The MKL04Z8VFK4 implements a single-core ARM Cortex-M0+ processor with Bit Manipulation Engine and Micro Trace Buffer support. Its clock system includes factory-trimmed 1 kHz LPO, 4 MHz internal reference, and external crystal support from 32 kHz to 32 MHz, enabling flexible low-power timing across RUN, VLPR, STOP, and VLLS modes.

System-level power management is handled by the System Mode Controller (SMC) with nine low-power modes, COP watchdog, and Low-Leakage Wakeup Unit. Memory subsystem features zero-wait-state flash controller and 90 nm TFS process technology, while analog integration includes a 12-bit SAR ADC with hardware averaging and a comparator with integrated 6-bit DAC.

Key Specifications

Pinout & Package

Package: 24-pin QFN (VFK4), 4 mm × 4 mm × 1 mm, 0.5 mm pitch, exposed thermal pad.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L011K4T6 and EFM32ZG108F8, the MKL04Z8VFK4 offers balanced performance-per-microwatt with integrated analog features critical for sensor front-ends, while maintaining identical 24-pin QFN footprint and industrial temperature rating.

Availability

MKL04Z8VFK4 is available at Aetrix Electronics and suitable for wearable health monitors, smart industrial sensor nodes, portable medical diagnostic tools, and energy-harvesting remote controls requiring stable component supply and long-term lifecycle assurance.

Supply support for MKL04Z8VFK4 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 company formed from the spin-off of Philips' semiconductor division, now specializing in secure connectivity solutions for automotive, industrial, and IoT markets.

The Kinetis KL04 series was designed specifically for cost-sensitive, ultra-low-power embedded applications requiring robust analog integration and extended battery life - targeting sensor hubs, wearables, and smart peripherals.

FAQ

What is the maximum operating frequency of the MKL04Z8VFK4?

The MKL04Z8VFK4 features an ARM Cortex-M0+ core rated for up to 48 MHz operation. This maximum frequency is achievable when powered within the specified 1.71–3.6 V supply range and using the high-frequency internal reference or an external crystal oscillator. The device maintains full functionality-including flash execution, peripheral operation, and debug access-at this speed, with zero-wait-state flash enabling deterministic performance.

Does the MKL04Z8VFK4 support hardware-based ADC averaging?

Yes, the MKL04Z8VFK4 includes hardware averaging capability in its 12-bit SAR ADC module. It supports configurable sample counts (up to 32) with automatic accumulation and right-aligned result storage, improving effective resolution and reducing software overhead. This feature is confirmed in Section 3.6.1 of the official datasheet and directly enhances signal-to-noise ratio for low-amplitude sensor inputs without CPU intervention - a key advantage in the MKL04Z8VFK4's target applications.

What is the lowest power consumption mode available on the MKL04Z8VFK4?

The MKL04Z8VFK4 supports Very-Low-Leakage Stop Mode 0 (VLLS0) as its deepest power-saving state, with typical current consumption of 0.3 µA at 3.0 V and 25°C - dropping to 0.45 µA at 105°C. In VLLS0, the device retains full register and RAM contents, supports wake-up via multiple sources (GPIO, LPUART, RTC alarm), and achieves 4 µs wakeup time. This mode is explicitly characterized and guaranteed across the full industrial temperature range, making it central to the MKL04Z8VFK4's value proposition for battery-critical designs.

Can the MKL04Z8VFK4 operate from a single lithium coin cell?

Yes, the MKL04Z8VFK4 is fully specified to operate across 1.71–3.6 V, matching the discharge curve of common CR2032 (2.0–3.0 V) and BR2032 (2.4–3.0 V) coin cells. Its ultra-low-power modes - especially VLLS0 (0.3 µA typ) and VLPR (213 µA typ) - enable multi-year operation in intermittently active applications. No external voltage regulation is required, simplifying bill-of-materials and PCB layout for compact, cost-sensitive consumer and medical devices using the MKL04Z8VFK4.

Is there a unique identifier embedded in the MKL04Z8VFK4?

Yes, each MKL04Z8VFK4 contains a factory-programmed, unalterable 80-bit unique identification number stored in dedicated memory. This UID is accessible via the SIM module's UID registers and is guaranteed to be globally unique across all Kinetis KL04 devices. It serves as a hardware root of trust for secure boot, device authentication, and firmware licensing - a verified feature documented in Section 3.5 of the official datasheet and applicable to every MKL04Z8VFK4 unit shipped.