STM32L031G6U7 - 32MHz Cortex-M0+ MCU | STMicroelectronics
料号： STM32L031G6U7 ✓ 量产中STM32L031G6U7 概述
An ultra-low-power microcontroller is a semiconductor device optimized to execute control logic while minimizing energy consumed during idle, sleep, and low-activity operating states. The STM32L031 belongs to the STM32L0 access-line hierarchy: Arm Cortex-M0+ microcontroller, 32-bit embedded MCU, and low-power MCU for battery-operated and always-connected systems. Its compact package supports space-constrained assemblies without requiring a larger leaded or high-pin-count footprint.
Key verified features include a 32-bit Arm Cortex-M0+ core operating at 32 MHz, 32 KB of Flash, and 8 KB of SRAM. The available interface set includes I2C, SPI, UART/USART, ADC, PWM, and LIN, while the Octopart comparison data identifies 21 I/O pins. These resources are balanced for low-cost control nodes that need multiple serial interfaces, mixed signal acquisition, and precise timing without the memory or processing demand of a higher-end MCU.
The STM32L031 architecture combines a 32-bit RISC core with an integrated peripheral set intended for embedded control. Firmware can use serial connectivity for sensors and actuators, ADC channels for analog measurements, timers for PWM generation, and LIN for distributed vehicle or industrial nodes. Exact electrical limits, memory-map details, clock-tree settings, and peripheral operating characteristics should be confirmed against the official STM32L031G6 datasheet before a production design is released.
Typical uses include compact sensor nodes, industrial condition-monitoring equipment, small motor-control loops, LIN-connected control modules, and low-power IoT peripherals. The 28-pin UFQFPN package also suits boards where component area is constrained but enough parallel and serial I/O is needed. The 32 MHz Cortex-M0+ core provides additional timing headroom compared with slower entry-level microcontrollers without moving to a more complex high-end device family.
Designers should allocate decoupling capacitors, route sensitive analog and communication signals away from switching nodes, and validate the exposed-pad thermal path on the PCB. Firmware and peripheral assignments must also be reviewed against the exact UFQFPN pin map and package variant. A replacement is not automatically production-equivalent merely because it uses a 28-pin UFQFPN package; memory capacity, temperature grade, peripheral availability, and electrical ratings must be checked.
This page consolidates verified manufacturer and distributor information, package and memory details, pricing observed as of 2026-10-30, same-brand drop-in candidates, and practical design guidance. It also distinguishes verified substitutions from general cross-reference tools, helping engineers evaluate PCB fit, firmware assumptions, and specification differences before committing a replacement to production.
直接替换替代料： STM32L031G6U7 ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： STM32L031G6U7 （相同外形与封装尺寸） ——差异在于 Package.
STM32C031G6U6
✅ 直接替换📋 参考替代料（不在目录中）
STM32C051G8U6
✅ 直接替换📋 参考替代料（不在目录中）
STM32F042G6U6TR
✅ 直接替换📋 参考替代料（不在目录中）
STM32L031G6U6
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
STM32L031F6U6
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
STM32L031G6U7 最大额定值与电气特性
| Product Type | 32-bit ultra-low-power microcontroller |
| Processor Core | Arm Cortex-M0+ |
| CPU Architecture | 32-bit RISC |
| Maximum CPU Frequency | 32 MHz |
| Flash Memory | 32 KB |
| SRAM | 8 KB |
| Number of I/O Pins | 21 pins |
| 封装 | 28-pin UFQFPN, 4 x 4 mm |
| 安装类型 | Surface mount |
| ADC | Available |
| I2C Interface | Available |
| SPI Interface | Available |
| UART/USART Interface | Available |
| LIN Interface | Available |
| PWM | Available |
| Watchdog Timer | Available |
| Brown-Out Detection and Reset | Available |
| DMA | Available |
STM32L031G6U7 28-pin ufqfpn, 4 x 4 mm 引脚配置指南
STM32L031G6U7（28-pin ufqfpn, 4 x 4 mm 封装）的引脚配置。 该数字 IC 包含 GPIO、通信接口（UART、SPI、I2C）和电源引脚。请参阅制造商数据手册以了解复用引脚功能和配置选项。对嵌入式系统设计和 PCB 布局至关重要。
暂无详细引脚数据： STM32L031G6U7.
请参阅 数据手册 以查看完整引脚配置。
典型应用
STM32L031G6U7 适用于 6 应用s: Compact Industrial Sensor Nodes, LIN-Connected Automotive Control Modules, Small Motor-Control and Actuator Loops, Battery-Powered IoT Peripherals, Communication Gateway and Protocol Converter, LED Lighting and Display Control.
Compact Industrial Sensor Nodes
The STM32L031G6U7 fits compact industrial sensor nodes that periodically measure a physical quantity and transmit the result through a serial link. Its 32 MHz Arm Cortex-M0+ core provides timing headroom, while the verified 21 I/O pins support digital sensors, status indicators, and digital control signals. The ADC interface enables analog front-end sampling, and I2C or SPI can connect local sensors and transceivers. With 32 KB of Flash and 8 KB of SRAM, the device can hold compact control firmware and a bounded measurement buffer. Designers should use the 4 x 4 mm 28-pin UFQFPN package to reduce board area and select external decoupling and protection appropriate to the installation environment.
推荐
LIN-Connected Automotive Control Modules
The STM32L031G6U7 is suitable for LIN-connected control modules because the verified interface set includes LIN, UART/USART, ADC, PWM, and 21 I/O pins. The 32 MHz Cortex-M0+ core can execute communication tasks and local control logic concurrently, while 32 KB of Flash accommodates compact automotive-node firmware and 8 KB of SRAM provides working memory. A typical implementation places the MCU between a LIN transceiver and local sensors or actuators, using timer PWM outputs for excitation and ADC channels for feedback. The exact transceiver, protection network, operating temperature, and electromagnetic-compatibility requirements must be selected separately because they are not specified by the MCU ordering code.
推荐
Small Motor-Control and Actuator Loops
The STM32L031G6U7 can serve as the controller in a small motor-control or actuator loop where its 32 MHz core, ADC, PWM timers, and 21 I/O pins provide the required control resources. The ADC can sample a position, current, or temperature signal, while PWM outputs command a driver stage rather than directly driving a motor. Its 32 KB of Flash and 8 KB of SRAM are adequate for bounded algorithms and control loops but not for large logging or complex graphics. Layout should keep switching-drive traces away from analog inputs, and the MCU supply should be filtered against driver transients. Final loop stability, thermal margins, and fault behavior require system-level testing.
推荐
Battery-Powered IoT Peripherals
The STM32L031G6U7 fits battery-powered IoT peripherals that combine local sensing with intermittent connectivity. Its ultra-low-power STM32L0 positioning, 32 MHz Cortex-M0+ core, and 32 KB of Flash allow a firmware design to remain responsive without the resources of a larger MCU. I2C and SPI suit low-power sensors, UART/USART supports compact module links, and the ADC can monitor a battery or analog input. The 28-pin 4 x 4 mm UFQFPN package minimizes board area in wearable, environmental, or remote-monitoring products. Firmware should use the device's low-power operating modes where supported, while hardware must minimize leakage around sensors, pull networks, and radio modules.
推荐
Communication Gateway and Protocol Converter
The STM32L031G6U7 is applicable to small protocol-conversion gateways that need to move data among I2C, SPI, and UART/USART devices. The 32-bit core at 32 MHz supports serial framing and state-machine workloads, while 21 I/O pins provide interfaces for status, control, and optional indicators. Its 32 KB of Flash constrains the firmware footprint, so protocol tables and buffering should remain compact, and the 8 KB of SRAM should be budgeted carefully under concurrent traffic. For a production gateway, use buffering when burst traffic exceeds the MCU's processing capacity and validate all baud-rate error margins. Galvanic-isolation or protection components must be added where the external bus requires them.
推荐
LED Lighting and Display Control
The STM32L031G6U7 can control compact LED lighting or display subsystems because timer PWM resources, 21 I/O pins, and a 32 MHz core support dimming, status indication, and simple sequencing. The MCU can receive commands through UART/USART or I2C and generate PWM-controlled outputs through an external LED driver. Its 32 KB of Flash is suitable for calibration tables and compact lighting effects, while the 4 x 4 mm UFQFPN package helps minimize controller size. Place the MCU and communications interface away from high-current LED return paths, use common grounding strategies, and provide local bulk and bypass capacitance. The MCU does not directly set LED current; the selected driver must establish the required current and thermal limits.
推荐
推荐产品汇总
工程参考数据： STM32L031G6U7 ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | STM32C031G6U6 | STM32C051G8U6 | STM32F042G6U6TR | STM32L031G6U6 | STM32L031F6U6 |
|---|---|---|---|---|---|---|
| Package | 28-UFQFPN (4x4) | 28-UFQFPN (4x4) | 28-UFQFPN (4x4) | 28-UFQFPN (4x4) | 28-UFQFPN (4x4) | 28-UFQFPN (4x4) |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics |
| Product Family | STM32L0 | STM32C0 | STM32C0 | STM32F0 | STM32L0 | STM32L0 |
关键差异点
- Matches the verified 32 MHz, 32 KB-Flash STM32L0 configuration （对比 STM32L031G6U6)
- Provides twice the verified Flash capacity in a compatible STM32C0 platform （对比 STM32C031G6U6)
- Maintains the same compact 28-pin UFQFPN footprint and 32 MHz core class （对比 STM32F042G6U6TR)
- Provides substantially more Flash than the lower-memory STM32L0 option （对比 STM32L031F6U6)
设计说明
Treat the 28-pin UFQFPN as a dense, leadless package rather than a generic QFN. Follow STMicroelectronics' exact 4 x 4 mm land pattern, including exposed-pad geometry, and verify paste volume and reflow profile. Place the decoupling network close to the supply and ground pins, provide a low-impedance ground reference, and avoid placing test pads or tall components beside the package where they interfere with assembly or rework.
Keep analog inputs, ADC references, and communication traces away from switching-power-converter nodes and high-current actuator returns. Use a continuous ground plane, route sensitive signals over a stable reference plane, and place input filtering close to the ADC source. The MCU's 32 MHz core can support precise sampling, but timing accuracy still depends on clock quality, peripheral configuration, source impedance, and the complete PCB return path.
Do not assume that two 28-pin UFQFPN microcontrollers are interchangeable solely because the footprints appear identical. Verify each exposed-pad connection, supply pin, ground pin, alternate function, debug interface, boot mode, and maximum rating. For STM32L031G6U7 replacements, also compare the 32 KB Flash limit, 8 KB SRAM requirement, 32 MHz clocking, firmware size, peripheral instances, temperature grade, and driver support before approving a substitution.
合规信息
The supplied verified records do not explicitly state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. No compliance conclusion has been inferred from the package or manufacturer name.
