NXP Semiconductors MKL04Z32VFK4R

Overview

MKL04Z32VFK4R 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 - deployed in battery-powered sensor nodes and smart metering endpoints.

For engineers reviewing the MKL04Z32VFK4R datasheet, MKL04Z32VFK4R pinout, MKL04Z32VFK4R application, or MKL04Z32VFK4R 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 SPI/I²C/UART interfaces with hardware DMA and SWD debug.

Technical Context

The MKL04Z32VFK4R implements an ARM Cortex-M0+ core with Bit Manipulation Engine and Micro Trace Buffer, paired with a multi-mode clock system featuring internal 4 MHz/32 kHz IRCs and external crystal support (32 kHz–32 MHz). Its power architecture integrates clock gating, dynamic voltage scaling, and zero-wait-state flash to enable sub-μA stop modes while retaining RAM and register state.

Peripheral integration includes a 6-channel Timer/PWM (TPM), 16-bit low-power timer (LPTMR), real-time clock, COP watchdog, and a 4-channel DMA controller servicing up to 63 request sources. Analog subsystem comprises a 12-bit SAR ADC with programmable reference, analog comparator with integrated 6-bit DAC, and bandgap reference (1.00 V typical).

Key Specifications

Pinout & Package

24-pin QFN (VFK4), 4 mm × 4 mm × 1 mm, 0.5 mm pitch, exposed thermal pad. Pinout validated per Freescale KL04P48M48SF1 datasheet Rev 4 (03/2014), Table 5.2 "KL04 pinouts" and Figure 5-2 "MKL04ZxxVFK4 pin assignment".

Key Features

Applications

Equivalent & Alternatives

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

Compared with MKL04Z32VFK4R, MKL04Z32VLC4 offers identical functionality in a larger LQFP package for easier prototyping, while MKL25Z32VLH4 adds USB and doubled RAM at the cost of higher active power and no direct pin replacement.

Availability

MKL04Z32VFK4R is available at Aetrix Electronics and suitable for battery-powered sensor nodes, industrial HMI panels, and portable medical monitors requiring stable component supply, long-lifecycle assurance, and verified industrial-grade qualification.

Supply support for MKL04Z32VFK4R 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 acquired Freescale in 2015 and maintains the Kinetis portfolio as part of its broad MCU family targeting cost-sensitive, ultra-low-power embedded applications.

The Kinetis KL series - including MKL04Z32VFK4R - was designed specifically for energy-constrained edge devices requiring high integration, robust industrial qualification, and scalable toolchain support across ARM Cortex-M0+/M4 platforms.

FAQ

What is the maximum operating frequency of the MKL04Z32VFK4R?

The MKL04Z32VFK4R 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 with appropriate clock configuration (e.g., MCG in FBE mode). The device also supports lower-frequency modes such as VLPR (up to 4 MHz) for ultra-low-power operation. MKL04Z32VFK4R maintains full peripheral functionality across all supported clock domains.

Does the MKL04Z32VFK4R support hardware debugging?

Yes, the MKL04Z32VFK4R includes a Serial Wire Debug (SWD) interface with dedicated SWD_CLK and SWD_DIO pins, enabling full programming, breakpoint setting, and real-time trace via standard ARM-compliant debug probes. It also integrates a Micro Trace Buffer for instruction flow analysis. No external debug header is required - SWD signals are routed directly on the 24-pin QFN package. MKL04Z32VFK4R does not support JTAG.

What analog peripherals are integrated into the MKL04Z32VFK4R?

The MKL04Z32VFK4R integrates a 12-bit SAR ADC with up to 16 channels, an analog comparator (CMP) with built-in 6-bit DAC and programmable reference input, and a precision bandgap reference (1.00 V typical). These peripherals operate from the isolated VDDA/VSSA supply domain and support low-power acquisition modes. MKL04Z32VFK4R does not include DACs beyond the 6-bit CMP-integrated unit or operational amplifiers.

What is the lowest power consumption mode available on the MKL04Z32VFK4R?

The MKL04Z32VFK4R supports Very-Low-Leakage Stop Mode 0 (VLLS0) with typical current draw of 0.3 μA at 3.0 V and 25°C - the lowest power state that retains full register and RAM content. Wake-up occurs in 4 μs via GPIO, RTC alarm, or LPUART activity. MKL04Z32VFK4R achieves this using 90 nm TFS process technology, aggressive clock gating, and optimized power gating circuits.

Is the MKL04Z32VFK4R RoHS compliant and qualified for industrial temperature range?

Yes, the MKL04Z32VFK4R is RoHS compliant and qualified for industrial ambient temperatures from -40°C to +105°C. Its thermal specifications include junction temperature limits up to +125°C and thermal resistance (RθJA) of 110°C/W on single-layer boards. The device meets JEDEC moisture sensitivity level 3 (MSL3) and is rated for lead-free reflow up to 260°C. MKL04Z32VFK4R carries full Freescale/NXP industrial qualification documentation.