NXP Semiconductors MKL14Z32VFM4R

Overview

MKL14Z32VFM4R 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, 28 GPIOs, and ultra-low-power operation down to 0.31 µA in VLLS0 mode. It integrates a 12-bit SAR ADC, two UARTs, two I²C modules, two SPI interfaces, six-channel TPM, LPTMR, RTC, and analog comparator with 6-bit DAC - designed for battery-powered sensor nodes and portable medical devices.

For engineers reviewing the MKL14Z32VFM4R datasheet, MKL14Z32VFM4R pinout, MKL14Z32VFM4R application, or MKL14Z32VFM4R equivalent, this page delivers verified specifications, validated low-power timing behavior, confirmed peripheral integration (including UART/I²C/SPI coexistence), real-world wakeup latency (4.4 µs from VLPS), and precise package mapping to 5×5 mm QFN-32 with 0.5 mm pitch.

Technical Context

The MKL14Z32VFM4R implements a single-core ARM Cortex-M0+ processor with Bit Manipulation Engine (BME) and Micro Trace Buffer (MTB), executing from zero-wait-state flash memory. Its clock system includes MCG with FEI/FBI/BLPI/PEE modes, supporting internal 4 MHz/32 kHz IRC and external crystal inputs (3–32 MHz).

Power management comprises nine low-power modes - including VLLS0 (0.31 µA typ.), VLLS1 (0.58 µA), and VLPS (3.75 µA) - enabled by clock gating, dynamic voltage scaling, and dedicated low-leakage wakeup unit. Peripheral adders (e.g., +22 µA for CMP, +66 µA for UART on MCGIRCLK) are characterized across –40°C to 105°C.

Key Specifications

Pinout & Package

32-pin QFN package (98ASA00473D1), 5 × 5 × 1 mm body, 0.5 mm pitch, exposed thermal pad (pin 32 = VSS). Pinout validated per KL14P80M48SF0RM1 Section 5.2 and QFN-32 signal assignment table.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L051K8U6 and EFM32HG322F64G, the MKL14Z32VFM4R provides superior analog integration (DAC+comparator), higher core frequency (48 MHz vs. ≤25 MHz), and richer communication concurrency (dual UART + dual I²C + dual SPI), making it optimal for mixed-signal edge nodes requiring both precision sensing and robust wired/wireless interfacing.

Availability

MKL14Z32VFM4R is available at Aetrix Electronics and suitable for wearable health monitors, smart industrial sensor nodes, and portable medical devices requiring stable component supply across extended production lifecycles.

Supply support for MKL14Z32VFM4R 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 ultra-low-power microcontrollers and edge AI acceleration.

The Kinetis KL14 family - including MKL14Z32VFM4R - was engineered for cost-sensitive, battery-constrained embedded systems demanding high analog integration, certified low-power operation, and seamless migration from 8-bit architectures like KL04.

FAQ

What is the maximum operating frequency of the MKL14Z32VFM4R core?

The MKL14Z32VFM4R 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, and is supported across the full temperature range (–40°C to +105°C) and supply voltage (1.71–3.6 V). The MKL14Z32VFM4R maintains full peripheral functionality at this speed, including simultaneous UART/I²C/SPI operation.

Does the MKL14Z32VFM4R support hardware debugging and trace?

Yes, the MKL14Z32VFM4R includes a Serial Wire Debug (SWD) interface compliant with ARM CoreSight standards, plus a Micro Trace Buffer (MTB) for real-time instruction trace without halting CPU execution. These capabilities are fully documented in the KL14P80M48SF0RM1 Reference Manual and enable non-intrusive profiling, crash analysis, and timing validation during firmware development - critical for certifying safety-critical applications using MKL14Z32VFM4R.

What are the key low-power modes available on the MKL14Z32VFM4R?

The MKL14Z32VFM4R offers nine low-power modes, with VLLS0 (Very-Low-Leakage Stop Mode 0) delivering 0.31 µA typical current at 3.0 V and 25°C while retaining full register and RAM state. Other validated modes include VLLS1 (0.58 µA), VLPS (3.75 µA), and STOP (319 µA), all with measured wakeup latencies under 5 µs. These values are characterized per Table 9 in KL14P80M48SF0 datasheet Rev 5 and apply directly to MKL14Z32VFM4R in its 32-pin QFN package.

Can the MKL14Z32VFM4R operate from a single 3.3 V supply across all peripherals?

Yes, the MKL14Z32VFM4R operates from a single 1.71–3.6 V supply, and all digital and analog peripherals - including the 12-bit ADC, analog comparator, UARTs, I²C, SPI, TPM, and RTC - are fully functional within this range. The device specifies VDDA = VDD ± 0.1 V, allowing direct connection of VDDA to VDD with proper decoupling. This simplifies power design for MKL14Z32VFM4R-based systems requiring minimal external regulation.

What package and pin count does the MKL14Z32VFM4R use?

The MKL14Z32VFM4R uses a 32-pin QFN package (documented as 98ASA00473D1), measuring 5 × 5 × 1 mm with 0.5 mm pitch and an exposed thermal pad (pin 32 = VSS). This package is distinct from other KL14 variants like MKL14Z32VFT4 (48-pin QFN) or MKL14Z32VLH4 (64-pin LQFP), and all pin assignments, electrical characteristics, and thermal performance data in the KL14P80M48SF0 datasheet apply specifically to this MKL14Z32VFM4R variant.