NXP Semiconductors MKL24Z64VFM4

Overview

MKL24Z64VFM4 from NXP Semiconductors (formerly Freescale) is a 32-bit ARM Cortex-M0+ microcontroller optimized for ultra-low-power embedded applications with USB connectivity. It operates at up to 48 MHz, integrates 64 KB flash and 8 KB SRAM, supports 23 GPIOs, and delivers 47 μA/MHz run power consumption in very low power run mode - enabling battery-powered HMI, sensor nodes, and USB-peripheral controllers.

For engineers reviewing the MKL24Z64VFM4 datasheet, MKL24Z64VFM4 pinout, MKL24Z64VFM4 application, or MKL24Z64VFM4 equivalent, key selection criteria include its 32-pin QFN package, USB 2.0 On-The-Go controller with on-chip transceiver, 12-bit SAR ADC, six-channel TPM timer, and support for nine low-power modes including VLLS0 (0.12 µA typical).

Technical Context

The MKL24Z64VFM4 implements an ARM Cortex-M0+ core with Bit Manipulation Engine (BME) and Micro Trace Buffer (MTB), paired with a flexible clock system featuring MCG with FLL, PLL, and internal/external oscillators (32 kHz–32 MHz). Its memory subsystem includes zero-wait-state flash and configurable SRAM retention across low-power states.

System-level integration includes a 4-channel DMA controller supporting 63 request sources, a low-leakage wakeup unit, COP watchdog, and SWD debug interface. Analog functions comprise a 12-bit SAR ADC with hardware averaging, analog comparator with integrated 6-bit DAC, and programmable reference input - all operable in VLPR and stop modes.

Key Specifications

Pinout & Package

Package: 32-pin QFN (VFM4), 5 mm × 5 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 STM32L053R8T6 and EFM32PG12B500F1024GL125, the MKL24Z64VFM4 uniquely combines USB OTG with integrated regulator, sub-µA stop modes, and 32-pin QFN packaging - making it optimal for space-constrained, battery-powered USB peripherals where BOM simplification and ultra-low quiescent current are critical.

Availability

MKL24Z64VFM4 is available at Aetrix Electronics and suitable for industrial sensor nodes, USB human interface devices, medical wearables, and smart home control panels requiring stable component supply and long-term lifecycle support.

Supply support for MKL24Z64VFM4 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, IoT, and mobile applications.

The MKL24Z64VFM4 belongs to the Kinetis KL24 sub-family - designed specifically for entry-level 32-bit ultra-low-power applications demanding USB connectivity, analog integration, and robust industrial temperature operation.

FAQ

What is the maximum operating frequency of the MKL24Z64VFM4?

The MKL24Z64VFM4 features an ARM Cortex-M0+ core rated for up to 48 MHz operation in normal run mode. This frequency is achievable with the MCG configured in PEE mode using an external crystal or oscillator. In very low power run (VLPR) mode, the maximum core clock is 4 MHz - a trade-off that reduces current consumption to 171 µA typical while retaining full register state and interrupt capability. The MKL24Z64VFM4 maintains this 48 MHz capability across its full –40°C to +105°C operating range when supplied within 1.71–3.6 V.

Does the MKL24Z64VFM4 support USB device functionality without external components?

Yes, the MKL24Z64VFM4 integrates a full-/low-speed USB 2.0 On-The-Go controller with an on-chip transceiver and a dedicated 5 V to 3.3 V regulator (VREGIN input). This allows direct connection to USB VBUS without requiring an external PHY or LDO, significantly reducing BOM count and PCB area. The MKL24Z64VFM4 supports standard USB classes including CDC, HID, and MSC out of the box when used with NXP's Kinetis SDK. USB operation is validated across the full voltage (1.71–3.6 V) and temperature (–40°C to +105°C) range.

How many GPIO pins are available on the MKL24Z64VFM4 in its 32-pin QFN package?

The MKL24Z64VFM4 in the 32-pin QFN (VFM4) package provides 23 general-purpose input/output (GPIO) pins. These are distributed across PORTA, PORTB, PORTC, and PORTD, with multiplexing support for alternate functions including UART, SPI, I²C, ADC inputs, TPM channels, and USB signals. All 23 GPIOs support interrupt-on-change, configurable pull-up/pull-down resistors (20–50 kΩ), and high-drive capability on select pins (PTB0, PTB1, PTD6, PTD7). This I/O count is explicitly confirmed in the Ordering Information table of the KL24P80M48SF0 datasheet for the MKL24Z64VFM4 variant.

What low-power modes does the MKL24Z64VFM4 support, and what is the lowest current draw?

The MKL24Z64VFM4 supports nine distinct low-power modes, including RUN, WAIT, STOP, VLPS, LLS, and three VLLS variants (VLLS0, VLLS1, VLLS3). The deepest mode is VLLS0, which achieves 0.12 µA typical current draw at 25°C with PORPO = 1 - retaining full register and RAM state while allowing wake-up from selected pins, RTC alarm, or LLWU sources. VLLS0 recovery time is 95–115 µs. All low-power modes are characterized across –40°C to +105°C and 1.71–3.6 V, with current values documented in Table 9 of the KL24P80M48SF0 datasheet Rev 5.

Is the MKL24Z64VFM4 pin-compatible with other Kinetis KL24 variants?

No, the MKL24Z64VFM4 is not pin-compatible with other KL24 package variants (e.g., VFT4, VLH4, VLK4) due to differing pin counts and layouts: VFM4 is 32-pin QFN, VFT4 is 48-pin QFN, VLH4 is 64-pin LQFP, and VLK4 is 80-pin LQFP. However, it is software-compatible across the KL24 family - sharing identical peripheral registers, memory map, and instruction set. Firmware developed for MKL24Z64VFM4 can be ported to larger variants with minimal adaptation, leveraging the same Kinetis SDK and toolchain. Pin mapping must be redesigned for any package change.