STMicroelectronics STM32L011K4T6TR

Overview

STM32L011K4T6TR from STMicroelectronics is an ultra-low-power 32-bit Arm® Cortex®-M0+ microcontroller in UFQFPN32 (5 × 5 mm) package, featuring 16 KB Flash, 2 KB SRAM, 512 B EEPROM with ECC, 12-bit ADC (1.14 Msps), and dual ultra-low-power comparators. It operates from 1.65–3.6 V across –40 to +125 °C and delivers 76 µA/MHz in Run mode - ideal for battery-powered sensor nodes and smart metering endpoints.

For engineers reviewing the STM32L011K4T6TR datasheet, STM32L011K4T6TR pinout, STM32L011K4T6TR application, or STM32L011K4T6TR equivalent, key selection criteria include standby current (0.23 µA), RTC-enabled Stop mode (0.54 µA), 5 µs Flash wakeup time, and 23 I/Os with 5V tolerance - all critical for energy-constrained embedded designs.

Technical Context

The STM32L011K4T6TR integrates a Cortex-M0+ core running up to 32 MHz with dynamic voltage scaling, supported by multiple clock sources: 16 MHz factory-trimmed HSI (±1%), 32 kHz LSE for RTC calibration, and a multispeed MSI (65 kHz–4.2 MHz). Its low-power architecture includes five operational modes - Run, Sleep, Low-power Run, Stop, and Standby - each with distinct power/performance tradeoffs validated per JEDEC JESD78.

Peripheral interconnect uses a dedicated AHB/APB matrix enabling concurrent DMA transfers to ADC, USART, SPI, I²C, and timers without CPU intervention. The device implements hardware ECC on both Flash and EEPROM, and embeds a 96-bit unique ID plus CRC calculation unit for firmware integrity verification.

Key Specifications

Pinout & Package

STM32L011K4T6TR is housed in a 32-pin UFQFPN (5 × 5 mm, 0.5 mm pitch) RoHS-compliant ECOPACK®2 package with exposed thermal pad. Pin assignments are validated per ST's DocID027973 Rev 5, Section 4 (Pin descriptions).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultra-low-power microcontroller applications.

Compared with STM32L031K4T6, the STM32L011K4T6TR trades USB and extra comparator for lower cost and identical ultra-low-power performance; versus EFM32ZG222F32, it provides integrated EEPROM and 5× lower Standby current - critical for decade-long deployments.

Availability

STM32L011K4T6TR is available at Aetrix Electronics and suitable for smart metering, wireless sensor networks, industrial predictive maintenance, and medical wearable devices requiring stable component supply across extended product lifecycles.

Supply support for STM32L011K4T6TR 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, power ICs, sensors, and automotive-grade components since 1987.

The STM32L0 series targets ultra-low-power embedded applications, emphasizing sub-µA standby operation, integrated analog peripherals, and robust memory integrity - specifically engineered for battery-operated IoT edge nodes and energy-harvesting systems.

FAQ

What is the maximum operating frequency and associated power consumption in Run mode?

The STM32L011K4T6TR runs at up to 32 MHz with typical current draw of 76 µA/MHz when executing code from Flash at 3.0 V. At 16 MHz, consumption drops to ~45 µA/MHz. These values are measured per Section 6.3.4 of DocID027973 Rev 5 under specified voltage and temperature conditions.

Does this MCU support hardware encryption or secure boot features?

No. The STM32L011K4T6TR does not integrate hardware AES, SHA, or secure boot engines. It relies on software-based cryptographic libraries and external secure elements for confidentiality. Its security model centers on readout protection (RDP), flash write protection, and tamper-detect-capable GPIOs.

Can the internal 16 MHz RC oscillator be used as the system clock without calibration?

Yes. The HSI16 oscillator is factory-trimmed to ±1% accuracy across voltage and temperature, enabling immediate use as the system clock without external crystal or runtime calibration - verified in Table 38 of the datasheet.

What is the minimum supply voltage for ADC operation with full 12-bit linearity?

The ADC maintains full 12-bit effective resolution down to 1.65 V supply, as confirmed in Section 6.3.15 (Table 54) and Figure 43 of the datasheet. Below 1.65 V, INL/DNL specifications degrade beyond ±1 LSB, limiting usable resolution.