NXP Semiconductors MKL26Z32VFM4

Overview

MKL26Z32VFM4 from NXP Semiconductors (formerly Freescale) is a 48 MHz ARM Cortex-M0+ microcontroller in 32-pin QFN package, featuring 32 KB flash, 4 KB SRAM, USB 2.0 On-The-Go with on-chip transceiver, 16-bit SAR ADC, and ultra-low-power operation down to 0.4 µA in VLLS0 mode. It serves as an entry-level 32-bit MCU for battery-powered human-machine interface and sensor-edge applications.

For engineers reviewing the MKL26Z32VFM4 datasheet, MKL26Z32VFM4 pinout, MKL26Z32VFM4 application, or MKL26Z32VFM4 equivalent, this page delivers verified technical context, low-power timing behavior, USB/ADC/TPM peripheral integration, and validated alternative options for cost-optimized industrial and consumer embedded designs.

Technical Context

The MKL26Z32VFM4 implements a single-core ARM Cortex-M0+ processor with Thumb-2 instruction set, executing from zero-wait-state flash memory. Its clock system integrates MCG with FLL, PLL, and internal/external oscillators supporting run modes up to 48 MHz and VLPR/VLPS modes at 4 MHz/1 MHz respectively.

Power management includes nine low-power modes (VLLS0–VLLS3, LLS, VLPS, STOP, WAIT, RUN), with full state retention at 2 µA and 4.5 µs wakeup from VLPS. The USB module operates in full-/low-speed OTG mode with integrated 5 V-to-3.3 V regulator and on-chip transceiver, requiring no external PHY.

Key Specifications

Pinout & Package

32-pin QFN (VFM4), 5 mm × 5 mm × 1 mm, 0.5 mm pitch, exposed thermal pad (EP). RoHS-compliant, moisture sensitivity level (MSL) 3.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MKL26Z32VFM4, KL26Z64VFM4 offers double flash capacity in identical footprint for seamless upgrade, while KL27Z32VFM4 delivers refined USB timing and hardware RNG-making it suitable for security-critical or USB-compliance-sensitive deployments where pin compatibility is retained.

Availability

MKL26Z32VFM4 is available at Aetrix Electronics and suitable for industrial HMI, battery-powered wearables, USB-C peripherals, and energy-harvesting sensor nodes requiring stable component supply and long-term lifecycle assurance.

Supply support for MKL26Z32VFM4 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 KL26 family was designed specifically for ultra-low-power, cost-sensitive embedded applications requiring USB connectivity, capacitive touch, and analog signal acquisition-targeting smart sensors, portable medical devices, and industrial control interfaces.

FAQ

What is the maximum USB clock frequency supported by MKL26Z32VFM4?

The MKL26Z32VFM4 supports USB full-speed operation at 48 MHz system clock, but requires the system clock to be reduced to 20–48 MHz range when USB is active. Per KL26P64M48SF5 datasheet Section 2.3.1, fSYS_USB minimum is 20 MHz to meet USB timing requirements. MKL26Z32VFM4 achieves this via its MCG clock generator in PEE mode with appropriate dividers, ensuring USB frame timing accuracy without external clock sources.

Does MKL26Z32VFM4 support hardware encryption or secure boot?

MKL26Z32VFM4 does not include dedicated hardware encryption accelerators (AES, SHA) or secure boot ROM. It provides an 80-bit unique identification number per chip for device authentication, and supports software-based cryptographic libraries. Secure boot must be implemented externally or via bootloader validation in flash; no on-die flash protection or tamper detection is present in this variant.

Can MKL26Z32VFM4 operate from a single 3.3 V supply without external regulators?

Yes, MKL26Z32VFM4 operates from a single 3.3 V supply across its full 1.71–3.6 V range. Its integrated USB 5 V-to-3.3 V regulator powers internal USB circuitry only when VBUS is present; the core, analog, and I/O domains are powered directly from VDD/VDDA. No external LDO is required unless tighter voltage tolerance or lower noise is needed for high-resolution ADC use.

What is the wakeup time from VLLS0 mode for MKL26Z32VFM4?

MKL26Z32VFM4 wakes from VLLS0 mode in 106–120 µs (typical 106 µs) to execute the first instruction, as specified in Table 8 of KL26P64M48SF5 Rev 5. This includes POR recovery and clock stabilization. The wakeup source (LLWU pin, RTC alarm, or internal reset) does not affect this timing; it is fixed by the FEI clock mode initialization sequence at default 21 MHz CPU frequency.

Is the TSI module on MKL26Z32VFM4 compatible with wet-finger or glove-touch operation?

The TSI module in MKL26Z32VFM4 supports configurable sensitivity and noise rejection, enabling reliable operation with wet fingers or thin gloves when properly calibrated and shielded. Application Note AN4895 confirms TSI robustness against moisture and EMI, but performance depends on electrode design, overlay material, and firmware tuning-no hardware-level glove/wet-finger mode is built-in; it is achieved through software threshold adaptation.