NXP Semiconductors MKL04Z32VFK4

Overview

MKL04Z32VFK4 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 32 KB Flash and 4 KB SRAM. It features ultra-low-power run mode (45 μA/MHz), 2 μA static current with full state retention, and integrated analog peripherals including a 12-bit SAR ADC and analog comparator with 6-bit DAC-designed for battery-powered sensor nodes and portable medical devices.

For engineers reviewing the MKL04Z32VFK4 datasheet, MKL04Z32VFK4 pinout, MKL04Z32VFK4 application, or MKL04Z32VFK4 equivalent, key selection criteria include its 24-pin QFN footprint, -40°C to +105°C operating range, 1.71–3.6 V supply, nine low-power modes, and support for SPI/I²C/UART interfaces in space-constrained embedded control designs.

Technical Context

The MKL04Z32VFK4 implements an ARM Cortex-M0+ core with Bit Manipulation Engine and Micro Trace Buffer for debug visibility. Its clock system integrates a multi-purpose oscillator supporting 32 kHz–40 kHz or 3–32 MHz crystals, plus internal 1 kHz LPO and factory-trimmed 1 MHz IRC-enabling flexible low-power timing across VLPR, VLPS, and STOP modes.

System-level power optimization is achieved via clock gating, dynamic voltage scaling, and nine configurable low-power modes-including VLLS0 (0.30 μA at 25°C) with PORPO=1 and full RAM retention. Peripheral integration includes a 4-channel DMA controller, six-channel TPM timer, real-time clock, and SWD debug interface compliant with ARM CoreSight standards.

Key Specifications

Pinout & Package

24-pin QFN (VFK4), 4 mm × 4 mm × 1 mm body, 0.5 mm pitch, exposed thermal pad. RoHS-compliant, moisture sensitivity level 3 (MSL3).

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L031K6T6 and EFM32ZG108F32, the MKL04Z32VFK4 uniquely balances 48 MHz performance, on-chip analog functionality, and 24-pin QFN footprint-making it optimal for cost-sensitive, space-constrained designs requiring mixed-signal integration without external signal conditioning.

Availability

MKL04Z32VFK4 is available at Aetrix Electronics and suitable for wearable health monitors, smart sensor nodes, portable medical devices, industrial control panels, and battery-backed data loggers requiring stable component supply across extended production lifecycles.

Supply support for MKL04Z32VFK4 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 Kinetis KL04 series was designed specifically for ultra-low-power, cost-optimized embedded control in space-constrained applications-emphasizing energy efficiency, analog integration, and rapid time-to-market through Kinetis SDK and MCUXpresso toolchain support.

FAQ

What is the maximum operating frequency of the MKL04Z32VFK4?

The MKL04Z32VFK4 supports a maximum core/system clock frequency of 48 MHz in normal run mode using the MCG in FBE configuration. In very-low-power run (VLPR) mode, the maximum is 4 MHz. This dual-frequency capability allows designers to trade performance for power savings dynamically based on real-time workload demands-ensuring MKL04Z32VFK4 remains responsive during active tasks while minimizing energy use during idle periods.

Does the MKL04Z32VFK4 include hardware debug support?

Yes, the MKL04Z32VFK4 includes full Serial Wire Debug (SWD) support with a Micro Trace Buffer (MTB) for instruction trace capture. This enables non-intrusive real-time debugging, profiling, and latency analysis directly in the target environment-critical for validating timing-critical firmware on MKL04Z32VFK4 without adding overhead or altering system behavior.

What analog peripherals are integrated into the MKL04Z32VFK4?

The MKL04Z32VFK4 integrates a 12-bit SAR ADC with up to 16 input channels, an analog comparator (CMP) with programmable reference and built-in 6-bit DAC, and dedicated VDDA/VSSA analog supply pins. These peripherals allow MKL04Z32VFK4 to perform sensor signal acquisition, threshold detection, and local calibration without external components-reducing bill-of-materials cost and PCB area in compact designs.

What low-power modes does the MKL04Z32VFK4 support?

The MKL04Z32VFK4 supports nine distinct low-power modes, including VLLS0 (0.30 μA), VLLS1 (0.64 μA), VLLS3 (1.16 μA), LLS (1.72 μA), VLPS (2.25 μA), STOP (257 μA), and WAIT modes. Each mode offers different combinations of clock gating, RAM retention, and peripheral enablement-giving designers granular control to optimize MKL04Z32VFK4 power consumption precisely for their application's duty cycle and wake-up requirements.

Is the MKL04Z32VFK4 pin-compatible with other Kinetis KL04 variants?

No-MKL04Z32VFK4 uses a 24-pin QFN (VFK4) package with 22 GPIOs, while other KL04 variants like MKL04Z32VLC4 (32-pin LQFP) and MKL04Z32VLF4 (48-pin LQFP) have different pin counts, layouts, and I/O allocations. Although they share identical core architecture and peripheral sets, MKL04Z32VFK4 requires its own PCB layout; migration between packages necessitates board redesign and signal reassignment.