NXP Semiconductors MKL24Z32VFT4

Overview

MKL24Z32VFT4 from NXP Semiconductors (formerly Freescale) is a 48 MHz ARM Cortex-M0+ microcontroller in 48-pin QFN package, featuring 32 KB flash, 4 KB SRAM, USB 2.0 On-The-Go with on-chip transceiver, 12-bit SAR ADC, and ultra-low-power operation down to 0.12 µA in VLLS0 mode. It serves as an entry-level 32-bit MCU for battery-powered HMI, sensor nodes, and USB-connected embedded control.

For engineers reviewing the MKL24Z32VFT4 datasheet, MKL24Z32VFT4 pinout, MKL24Z32VFT4 application, or MKL24Z32VFT4 equivalent, key selection considerations include its 48-pin QFN footprint, USB full/low-speed capability with integrated 5 V-to-3.3 V regulator, nine low-power modes, 36 GPIOs, and compatibility with Kinetis L-family toolchains and peripheral drivers.

Technical Context

The MKL24Z32VFT4 implements a single-core ARM Cortex-M0+ processor with Bit Manipulation Engine (BME) and Micro Trace Buffer (MTB) for debug visibility. Its clock system integrates a Multi-purpose Clock Generator (MCG) supporting FEI, FBE, PEE, and BLPI modes, enabling dynamic switching between high-performance (48 MHz) and ultra-low-power (4 MHz VLPR) operation.

System-level power management includes nine configurable low-power modes - from Wait and Stop to VLLS0 - with sub-microamp static current and 4 µs wakeup from VLPS. Peripheral integration includes two UARTs (one low-power), two I²C modules, two SPI interfaces, six-channel TPM, 16-bit LPTMR, RTC, COP watchdog, and DMA supporting 63 request sources.

Key Specifications

Pinout & Package

48-pin QFN (VFT4), 7 mm × 7 mm × 1 mm body, 0.5 mm pitch, exposed thermal pad. Pinout validated per Freescale document KL24P80M48SF0RM1 Section 5.2 and package drawing 98ASA00466D1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with KL26Z32VFT4, MKL24Z32VFT4 offers lower BOM cost and identical pinout but less flash and no hardware crypto accelerators; versus STM32F072CBT6, it delivers superior ultra-low-power performance and integrated USB regulation at the expense of memory capacity and peripheral count.

Availability

MKL24Z32VFT4 is available at Aetrix Electronics and suitable for smart sensor nodes, USB human interface devices, and industrial control panels requiring stable component supply across extended product lifecycles.

Supply support for MKL24Z32VFT4 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 applications, formed from the acquisition of Freescale Semiconductor in 2015.

The Kinetis KL24 family was designed as an ultra-low-power, USB-enabled entry-level 32-bit MCU line targeting cost-sensitive, battery-operated embedded systems requiring robust peripheral integration and long-term supply stability.

FAQ

What is the maximum operating frequency of the MKL24Z32VFT4 core?

The MKL24Z32VFT4 features an ARM Cortex-M0+ core rated for up to 48 MHz operation. This maximum frequency is achievable when the Multi-purpose Clock Generator (MCG) is configured in PEE mode with a 48 MHz system clock, and all timing constraints - including flash wait states and bus clock ratios - are met per the KL24P80M48SF0 datasheet Section 2.3.1.

Does the MKL24Z32VFT4 support USB device functionality without external components?

Yes, the MKL24Z32VFT4 integrates a full-speed/low-speed USB 2.0 On-The-Go controller with an on-chip transceiver and a dedicated 5 V-to-3.3 V regulator. This allows standalone USB device operation using only a single 5 V supply, eliminating the need for external PHY, level shifters, or LDOs - confirmed in the "Communication Interfaces" section of the KL24P80M48SF0 datasheet.

How many GPIO pins are available on the MKL24Z32VFT4 in the 48-pin QFN package?

The MKL24Z32VFT4 in the 48-pin QFN (VFT4) package provides 36 general-purpose I/O pins, as specified in the Ordering Information table and validated in the pin assignment diagrams of the KL24P80M48SF0 Reference Manual. These include PTA0–PTA31, PTB0–PTB15, PTC0–PTC7, and PTD0–PTD7, with function multiplexing managed via port control registers.

What is the lowest power consumption mode supported by the MKL24Z32VFT4?

The MKL24Z32VFT4 supports Very Low-Leakage Stop Mode 0 (VLLS0) with typical current consumption of 0.12 µA at 25°C and 3.0 V, as measured with PORPO = 1 in the SMC_STOPCTRL register. This mode retains full register and RAM content while disabling all clocks except the 32 kHz LPO, enabling wake-up via RTC alarm or external pin interrupt - detailed in Table 9 of the KL24P80M48SF0 datasheet.

Is the MKL24Z32VFT4 compatible with standard ARM Cortex-M0+ development tools?

Yes, the MKL24Z32VFT4 is fully compatible with ARM-standard toolchains including Keil MDK, IAR Embedded Workbench, and GCC-based IDEs like MCUXpresso. Its SWD debug interface, Micro Trace Buffer, and CMSIS-compliant peripheral driver libraries ensure seamless integration with ARM ecosystem tools - confirmed in the KL24 Family Product Brief and MCUXpresso SDK documentation.