NXP Semiconductors MKL04Z8VLC4

Overview

MKL04Z8VLC4 from NXP Semiconductors (formerly Freescale) is a 32-bit ARM Cortex-M0+ microcontroller in 32-pin LQFP package, operating up to 48 MHz with 8 KB Flash and 1 KB SRAM. It delivers ultra-low-power operation (down to 0.3 µA in VLLS0 mode), integrates 12-bit SAR ADC, analog comparator with 6-bit DAC, and supports nine low-power modes. It is deployed in battery-powered sensor nodes and portable medical devices requiring deterministic real-time control and long-term energy efficiency.

For engineers reviewing the MKL04Z8VLC4 datasheet, MKL04Z8VLC4 pinout, MKL04Z8VLC4 application, or MKL04Z8VLC4 equivalent, key selection criteria include verified VLLS0 current (0.3–0.54 µA at 3.0 V), 41 GPIO count, 12-bit ADC performance at 1.2 MSPS, LQFP-32 thermal resistance (RθJA = 59°C/W on 4-layer board), and compatibility with Kinetis KL04 software enablement tools including Kinetis Design Studio and MCUXpresso SDK.

Technical Context

The MKL04Z8VLC4 implements an ARM Cortex-M0+ core with Bit Manipulation Engine and Micro Trace Buffer for debug visibility. Its clock system includes MCG with FBE/BLPE/FEI modes, supporting internal 4 MHz/32 kHz IRC and external crystal inputs (32 kHz–16 MHz). Power management leverages SMC with nine defined low-power states, including VLLS0–VLLS3, VLPS, and STOP, each with distinct wake-up sources and retention capabilities.

Peripheral integration centers on low-energy operation: TPM timers support PWM generation with 6-channel flexibility; UART0 operates in VLPR/VLPS with 4 MHz IRC or external clock; I²C and SPI modules retain functionality down to 1 MHz bus clock; ADC uses synchronous sampling with programmable conversion triggers and hardware averaging. All analog blocks (ADC, CMP, DAC) share VDDA/VSSA rails and are characterized across –40°C to 105°C.

Key Specifications

Pinout & Package

Package: 32-pin LQFP (7 mm × 7 mm, 0.8 mm pitch), RoHS-compliant, moisture sensitivity level 3 per J-STD-020.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MKL04Z8VLC4, STM32L011K4T6 offers stronger security features but reduced analog integration, while EFM32ZG108F16 delivers superior RF resilience and lower deep-sleep current at the expense of ADC flexibility and timer channel count - both require PCB layout revision due to different pinouts and package footprints.

Availability

MKL04Z8VLC4 is available at Aetrix Electronics and suitable for industrial control panels, portable medical monitors, smart sensor nodes, and asset tracking beacons requiring stable component supply across extended product lifecycles.

Supply support for MKL04Z8VLC4 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 roots in Freescale's embedded processing heritage.

The Kinetis KL04 family was designed specifically for ultra-low-power, cost-sensitive edge devices requiring rich analog integration, deterministic real-time behavior, and seamless toolchain compatibility across the broader Kinetis portfolio.

FAQ

What is the maximum operating frequency of the MKL04Z8VLC4 core?

The MKL04Z8VLC4 features an ARM Cortex-M0+ core rated for up to 48 MHz operation in normal run mode. This frequency is achievable using the MCG in FBE mode with an external 4–16 MHz crystal oscillator. In very-low-power run (VLPR) mode, the core is limited to 4 MHz to maintain sub-300 µA current consumption. The MKL04Z8VLC4 datasheet specifies fSYS ≤ 48 MHz as the absolute maximum system clock frequency under all valid voltage and temperature conditions.

Does the MKL04Z8VLC4 support hardware-based AES encryption?

No, the MKL04Z8VLC4 does not include a hardware AES accelerator or cryptographic module. It relies on software-based implementations for encryption tasks. Security features are limited to an 80-bit unique identification number per chip and basic memory protection via the System Memory Management Unit (SMMU) in the ARM Cortex-M0+ core. For applications requiring hardware-accelerated cryptography, alternative devices such as the STM32L011K4T6 or NXP's own LPC54102 should be evaluated.

How many analog-to-digital converter (ADC) channels does the MKL04Z8VLC4 support?

The MKL04Z8VLC4 integrates a single 12-bit SAR ADC with up to 16 differential or 32 single-ended input channels, selectable via the ADCx_SC1n registers. Channel mapping is defined by the PTB0–PTB13 and PTA0–PTA13 pin assignments, with specific pins designated as ADC0_SE0 through ADC0_SE15. The ADC supports hardware averaging, programmable sample time, and trigger sources including TPM, LPTMR, and software commands - all documented in the MKL04Z8VLC4 reference manual section 36.

What is the minimum supply voltage required to retain SRAM contents on the MKL04Z8VLC4?

The MKL04Z8VLC4 requires a minimum VDD of 1.2 V to retain SRAM contents, as specified in Table 5 (Voltage and current operating requirements) of the datasheet. Below this threshold, data loss in SRAM is not guaranteed. This retention voltage applies across the full operating temperature range (–40°C to +105°C) and is independent of low-power mode selection. For designs using brown-out detection, the LVD threshold must be configured above 1.2 V to prevent inadvertent SRAM corruption during voltage sag events.

Can the MKL04Z8VLC4 operate from an internal 32 kHz RC oscillator without external components?

Yes, the MKL04Z8VLC4 includes an internal 32 kHz low-power oscillator (LPO) that requires no external components and is factory-trimmed to ±10% accuracy. This oscillator is usable in all low-power modes including VLLS0–VLLS3 and supports RTC operation, COP watchdog timing, and as a clock source for LPTMR. However, it cannot serve as the main system clock source - the MCG must use FEI or BLPI mode with the 4 MHz IRC for core execution. The LPO is explicitly enabled via SCG_SIRCCFG[LOLS] and SCG_SIRCCSR[LPOEN].