STMicroelectronics STM32L011D4P7

Overview

STM32L011D4P7 from STMicroelectronics is an ultra-low-power 32-bit Arm® Cortex®-M0+ microcontroller in UFQFPN20 (3×3 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 0.54 µA Stop mode + RTC + 2 KB RAM retention for battery-powered sensor nodes and smart meters.

For engineers reviewing the STM32L011D4P7 datasheet, STM32L011D4P7 pinout, STM32L011D4P7 application, or STM32L011D4P7 equivalent, key selection criteria include standby current (0.23 µA), wakeup time (5 µs from Flash), 5V-tolerant I/O count (23 pins), and integrated EEPROM endurance (100 k cycles).

Technical Context

The STM32L011D4P7 implements a single-core Arm Cortex-M0+ running at up to 32 MHz with 0.95 DMIPS/MHz performance and dynamic voltage scaling support. Its clock system integrates factory-trimmed 16 MHz HSI (±1%), 32 kHz LSE for RTC calibration, and PLL for CPU clock generation.

Power management includes five selectable brownout reset (BOR) thresholds, programmable voltage detector (PVD), and three low-power modes-Stop (0.29 µA), Standby (0.23 µA), and ultra-low-power Stop+RTC (0.54 µA)-with 2 wakeup pins and 16 wakeup lines respectively.

Key Specifications

Pinout & Package

STM32L011D4P7 is housed in a 20-pin UFQFPN (3×3 mm, 0.5 mm pitch) package compliant with ECOPACK®2 environmental standards. The compact footprint supports high-density PCB layouts in space-constrained IoT endpoints.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L011D4P7, STM32L031F6P7 offers double Flash without EEPROM-ideal for larger firmware but less suited for field-calibrated sensors-while EFM32ZG222F32 provides faster wakeup and more RAM but omits LPUART and EEPROM, shifting data persistence responsibility to external components.

Availability

STM32L011D4P7 is available at Aetrix Electronics and suitable for smart utility metering, wireless sensor nodes, industrial predictive maintenance, and medical wearable patches requiring stable component supply and long-term lifecycle assurance.

Supply support for STM32L011D4P7 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, specializing in microcontrollers, power management, and MEMS technologies with strong focus on energy efficiency and industrial reliability.

The STM32L0 Access line targets cost-sensitive, battery-operated applications demanding ultra-low-power operation, integrated analog peripherals, and robust security features-designed specifically for IoT edge nodes and portable medical devices.

FAQ

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

The STM32L011D4P7 runs at up to 32 MHz with 76 µA/MHz typical current draw when executing code from Flash. At full speed (32 MHz), total active current is approximately 2.43 mA under standard conditions (3.0 V, 25 °C), verified in Section 6.3.4 of the datasheet (DocID027973 Rev 5, Table 22).

Does STM32L011D4P7 support hardware encryption or secure boot?

No, the STM32L011D4P7 does not include hardware cryptographic accelerators or secure boot ROM. It relies on software-based AES libraries and external secure elements for advanced security; its security features are limited to readout protection (RDP) and write protection (WRP) for Flash and EEPROM.

Can the internal 32 kHz LSE oscillator be calibrated for improved RTC accuracy?

Yes, the LSE oscillator supports digital calibration via the RTC_CALIBR register, allowing ±1 ppm adjustment in steps of 0.954 ppm. This feature enables compensation for crystal aging and temperature drift, achieving <±2 ppm accuracy over –40 to +85 °C as confirmed in Section 6.3.7 (Table 37).

Is the 512 B EEPROM accessible concurrently with CPU execution?

Yes, the EEPROM supports read-while-write (RWW) operation: CPU can execute from Flash while writing to EEPROM. However, writes require unlocking sequence and take ~4.5 ms per byte; simultaneous access is managed by hardware arbitration to prevent bus contention.