STMicroelectronics STM32L031F6P7

Overview

STM32L031F6P7 from STMicroelectronics is an ultra-low-power 32-bit Arm® Cortex®-M0+ microcontroller in UFQFPN28 (4×4 mm) package, featuring 32 KB Flash, 8 KB SRAM, 1 KB 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 targets battery-powered sensor nodes and smart meters requiring sub-µA standby current (0.23 µA) and fast 5 µs wakeup from Flash.

For engineers reviewing the STM32L031F6P7 datasheet, STM32L031F6P7 pinout, STM32L031F6P7 application, or STM32L031F6P7 equivalent, key selection criteria include verified low-power mode current specs (Stop: 0.35 µA; Standby: 0.23 µA), 31 I/Os with 5V tolerance, integrated RTC with 8 KB RAM retention, and bootloader support for USART/SPI - all confirmed in DS10668 Rev 6.

Technical Context

The STM32L031F6P7 implements a single-core Arm Cortex-M0+ running at up to 32 MHz, supported by dynamic voltage scaling and multiple clock sources: HSI16 (±1%), LSE (32 kHz RTC), MSI (65 kHz–4.2 MHz), and PLL. Its interconnect matrix routes peripherals-including ADC, timers, and communication interfaces-to the CPU without bus contention.

Ultra-low-power operation is enabled by five distinct power modes (Run, Sleep, Low-power Run, Stop, Standby), each with configurable peripheral retention and wakeup sources (e.g., 16 EXTI lines in Stop mode, 2 pins in Standby). The embedded BOR offers five programmable thresholds, and the PVD supports voltage monitoring down to 1.65 V.

Key Specifications

Pinout & Package

STM32L031F6P7 uses the UFQFPN28 (4 × 4 mm, 0.5 mm pitch) package per ST's mechanical data (DS10668 Rev 6, Table 73), with 28 terminals including 25 I/Os, VDD/VSS, NRST, BOOT0, and VREF+.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L011F4P6, the STM32L031F6P7 adds 1 KB EEPROM and doubles Flash - enabling secure parameter storage and larger OTA payloads. Versus STM32L051K8U6, it trades USB and extra I/Os for smaller size and lower cost, making it optimal for space-constrained, battery-critical nodes.

Availability

STM32L031F6P7 is available at Aetrix Electronics and suitable for smart utility metering, wireless sensor nodes, industrial asset monitors, and medical wearables requiring stable component supply across long product lifecycles.

Supply support for STM32L031F6P7 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, designing and manufacturing microcontrollers, power ICs, sensors, and analog products for industrial, automotive, and consumer markets.

The STM32L0-series targets ultra-low-power embedded applications - optimized for battery-operated devices needing sub-µA standby, fast wakeup, and integrated analog peripherals without sacrificing code density or security features.

FAQ

What is the maximum operating frequency and core type of the STM32L031F6P7?

The STM32L031F6P7 integrates an Arm Cortex-M0+ core rated for up to 32 MHz operation, delivering 0.95 DMIPS/MHz performance. Its maximum frequency is achievable across the full 1.65–3.6 V supply range, with dynamic voltage scaling maintaining efficiency at lower voltages. This is confirmed in Section 3.3 of DS10668 Rev 6.

Does the STM32L031F6P7 support hardware encryption or secure boot?

No, the STM32L031F6P7 does not include hardware cryptographic accelerators (AES, SHA, PKA) or secure boot ROM. Security relies on software-implemented protocols and Flash readout protection (RDP Level 1/2). For hardware security, ST recommends the STM32L07x or STM32L1xx series - this distinction is explicitly stated in the device summary table (Table 1) and feature comparison (Table 2).

What are the exact low-power mode current values for STM32L031F6P7 at 25°C?

At 25°C and 3.0 V supply, typical currents are: Standby mode = 0.23 µA (with 2 wakeup pins enabled), Stop mode = 0.35 µA (16 wakeup lines), and Stop mode with RTC + 8 KB RAM retention = 0.6 µA. These values are measured per Section 6.3.1 and Table 31–32 in DS10668 Rev 6, and apply specifically to the UFQFPN28 package variant.

Can the STM32L031F6P7 drive 5V logic directly without level shifters?

Yes - 31 GPIOs (PA0–PA15, PB0–PB15, PC13–PC15) are 5V tolerant when VDD is ≥2.0 V, as specified in Section 6.3.13 and Table 53 of DS10668 Rev 6. This allows direct connection to 5V UART transceivers, I2C pull-ups, or digital sensors without external level-shifting circuitry.