NXP Semiconductors MKL27Z64VFM4

Overview

MKL27Z64VFM4 from NXP (formerly Freescale) is a 32-bit ARM® Cortex®-M0+ microcontroller optimized for ultra-low-power, battery-operated USB-enabled devices. It integrates 64 KB flash, 16 KB SRAM, crystal-less USB Full-Speed 2.0 device controller, FlexIO for peripheral emulation, and operates from 1.71–3.6 V across –40 to 105 °C in a 32-pin QFN package.

For engineers reviewing the MKL27Z64VFM4 datasheet, MKL27Z64VFM4 pinout, MKL27Z64VFM4 application, or MKL27Z64VFM4 equivalent, key selection considerations include its 48 MHz max core frequency, 46 µA/MHz run-mode efficiency, 1.68 µA stop-mode current with RTC+RAM retention, USB FS crystal-less operation, and 24 GPIOs in compact 5×5 mm QFN.

Technical Context

The MKL27Z64VFM4 implements an ARM Cortex-M0+ core with NVIC and SWD debug interface, paired with a MCG-Lite clock system supporting HIRC48M (±0.5%), LIRC8M (±3%), and 32 kHz–32 MHz external oscillators. Its crossbar switch enables concurrent bus master access to peripherals including USB, FlexIO, ADC, and multiple UART/I²C/SPI interfaces.

Power management includes six static low-power modes (Run/VLPR/Wait/VLPW/Stop/VLPS/LLS/VLLS), with AWIC and LLWU enabling wake-up from Stop and VLLS modes via pins, RTC, LPUART, CMP, or USB interrupts. The integrated ROM bootloader supports firmware updates over UART, I²C, SPI, and USB without external host.

Key Specifications

Pinout & Package

Package: 32-pin QFN (VFM4), 5 mm × 5 mm, 0.5 mm pitch, 0.65 mm height, exposed thermal pad.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MKL27Z64VLH4, the MKL27Z64VFM4 trades I/O count and package size for compactness and lower assembly cost; versus MKE02Z64VQH2, it adds USB, FlexIO, and superior low-power performance at modest cost premium - making it optimal for space-constrained, battery-powered USB peripherals.

Availability

MKL27Z64VFM4 is available at Aetrix Electronics and suitable for wearable health monitors, smart sensor nodes, USB HID peripherals, and portable medical diagnostic tools requiring stable component supply, long-term lifecycle support, and verified production-grade silicon.

Supply support for MKL27Z64VFM4 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 Kinetis KL27 family was designed specifically for cost-sensitive, battery-powered USB-enabled edge devices - emphasizing ultra-low active and standby power, integrated USB PHY, and flexible peripheral emulation via FlexIO.

FAQ

Does MKL27Z64VFM4 support crystal-less USB Full-Speed operation?

Yes, MKL27Z64VFM4 integrates a USB Full-Speed 2.0 device controller with internal 48 MHz HIRC oscillator trimmed to ±0.5% accuracy, enabling reliable USB enumeration and data transfer without an external 12 MHz crystal. This is confirmed in the KL27P64M48SF2 datasheet Section 2.2.15 and electrical specs Table 5-39.

What is the maximum number of GPIOs available on MKL27Z64VFM4?

MKL27Z64VFM4 provides 24 general-purpose I/O pins, as specified in Table 1 (Ordering Information) of the KL27P64M48SF2 datasheet. All 24 GPIOs are 5 V tolerant and support configurable pull-up/pull-down, interrupt, and digital filtering - matching the 32-pin QFN (VFM4) package pinout.

Can MKL27Z64VFM4 operate in ultra-low-power modes with RTC and RAM retention?

Yes, MKL27Z64VFM4 achieves 1.68 µA in Stop mode with both RTC and 16 KB SRAM retained, as documented in Section 2.1.8 and Table 6 of the datasheet. This enables time-stamped sensor logging and instant wake-up without reloading application context - critical for battery-powered monitoring systems.

Is there a factory-programmed bootloader in MKL27Z64VFM4?

Yes, MKL27Z64VFM4 includes 16 KB of ROM containing a production bootloader supporting firmware updates over UART, I²C, SPI, and USB. This is verified in Section 2.1.4 (Memory) and Section 2.1.5 (Reset and boot), and enables secure field upgrades without JTAG debug hardware.

What ADC resolution and sampling rate does MKL27Z64VFM4 support?

MKL27Z64VFM4 features a 16-bit SAR ADC with up to 8 single-ended input channels. At ≤13-bit resolution, it achieves up to 818 ksps sample rate with internal 1.2 V reference, as stated in Section 2.2.4 and Table 5-32 of the datasheet - suitable for high-fidelity analog sensor interfacing in portable diagnostics.