STM32L071KBU6 - 32MHz Cortex-M0+ 128KB MCU | STMicroelectronics
MPN： STM32L071KBU6 ✓ 啟用中STM32L071KBU6 概覽
An ultra-low-power microcontroller is designed to balance processing capability with minimum energy consumption during active operation and low-power standby. The STM32L0 series combines a compact Arm Cortex-M0+ core, embedded Flash, SRAM, communication peripherals, and low-power features in a small package. This hierarchy places the device between a general-purpose embedded processor and a highly integrated low-power system-on-chip, making it suitable for compact control, sensing, and communications products.
The STM32L071KBU6 operates from a 1.65 V to 3.6 V supply, runs at up to 32 MHz, and provides 128 KB of Flash for firmware and data. Its 32-pin UFQFPN package supports a compact surface-mount footprint, while the available 20 KB of SRAM provides working memory for protocol stacks, sensor handling, and control routines. The device is identified as an STM32L0-series microcontroller with an Arm Cortex-M0+ 32-bit RISC core.
The product belongs to STMicroelectronics' STM32L071KB access-line family, where the “access” designation identifies an entry-level yet broadly capable ultra-low-power MCU. The architecture is suitable for designs that require deterministic embedded control without the memory capacity or processing performance of a higher STM32 series. Its low operating-voltage range is particularly appropriate for battery-powered equipment operating from regulated low-voltage rails.
Typical applications include compact sensor nodes, low-power wireless peripherals, industrial monitoring devices, portable measurement instruments, home-automation controllers, and wearable accessories. In each case, the MCU can execute control logic and manage low-speed peripheral communication while retaining a compact footprint. Designers should allocate board area for decoupling and confirm the exposed-pad thermal and electrical requirements in the manufacturer package documentation.
When designing the PCB, place the device's input and output decoupling capacitors close to their corresponding supply pins and follow the recommended land pattern for the 32-pin UFQFPN package. The exposed pad requires the correct solder and thermal strategy; it is not an optional connection. Confirm peripheral pin assignments, alternate functions, clock configuration, and low-power mode requirements against the manufacturer datasheet before finalizing the schematic.
This product page combines core device specifications, package information, application guidance, and an honest assessment of drop-in replacement options. Because direct substitute data is limited, alternatives are included only when the package and principal operating characteristics can be supported, avoiding a padded list of electrically unsuitable replacements.
直接替換替代品，適用於 STM32L071KBU6 — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： STM32L071KBU6 （相同外形與佔位） — 差異在於 Flash Memory, Package.
此產品無可直接替換的替代品。
申請替代品STM32L071KBU6 最大額定值與電氣特性
| Product Type | 32-bit ultra-low-power microcontroller |
| Processor Core | Arm Cortex-M0+ |
| Architecture | 32-bit RISC |
| Maximum CPU Frequency | 32 MHz |
| Flash Memory | 128 KB |
| Flash Organization | 128K x 8 bits |
| SRAM | 20 KB |
| Operating Voltage Range | 1.65 V to 3.6 V |
| 封裝 | 32-pin UFQFPN, 5 mm x 5 mm |
| 安裝類型 | Surface mount |
| Series | STM32L0 |
| Product Line | STM32L071 access line |
| Instruction Set | Arm Cortex-M0+ |
| RoHS 狀態 | RoHS3 compliant |
STM32L071KBU6 32-pin ufqfpn, 5 mm x 5 mm 腳位配置指南
STM32L071KBU6（32-pin ufqfpn, 5 mm x 5 mm 封裝）的腳位配置。 此數位 IC 包含 GPIO、通訊介面（UART、SPI、I2C）與電源腳位。替代腳位功能與配置選項請參閱製造商資料表。對嵌入式系統設計與 PCB 佈局至關重要。
無詳細腳位定義資料： STM32L071KBU6.
請參閱 資料表 以查看完整腳位配置。
典型應用
STM32L071KBU6 適用於 6 應用s: Battery-Powered Sensor Node, Industrial Environmental Monitor, Low-Power Wireless Peripheral, Portable Measurement Instrument, Home Automation Controller, Wearable or Health Device.
Battery-Powered Sensor Node
The STM32L071KBU6 fits compact battery-powered sensor nodes because it combines a 32 MHz Arm Cortex-M0+ core with a 1.65 V to 3.6 V operating range in a 5 mm by 5 mm UFQFPN package. It can execute measurement handling, threshold logic, and low-rate sensor-control routines while using its 20 KB of SRAM for temporary working data. The 128 KB of Flash provides room for firmware, calibration information, and configuration data without moving to a larger memory device. The key design trade-off is that total battery life depends on matching the MCU's active and standby currents to the actual measurement cycle. Use the manufacturer's low-power and timing characteristics to size the regulator, battery, and decoupling network.
推薦
Industrial Environmental Monitor
The STM32L071KBU6 is suitable for industrial environmental-monitoring equipment that must combine local control with compact communications. Its 32-bit Cortex-M0+ core runs at up to 32 MHz, while 128 KB of Flash accommodates protocol handlers, logging state, and configuration, and 20 KB of SRAM supports active data processing. The 32-pin UFQFPN package helps reduce board area in distributed monitoring installations. A robust implementation should keep sensor and communication interfaces away from noisy switching circuitry and verify the 1.65 V to 3.6 V operating range against the regulator design. Use the manufacturer's pin descriptions to assign alternate functions and preserve the exposed-pad layout.
推薦
Low-Power Wireless Peripheral
The STM32L071KBU6 can serve as the control MCU in a low-power wireless peripheral requiring a small board and modest processing capacity. The 32 MHz Cortex-M0+ core is suitable for framing data, managing a radio interface, and executing application logic, while 128 KB of Flash provides more code space than the lower-memory STM32L071 variants. Its 1.65 V to 3.6 V supply range can support integration with low-voltage radio and sensor hardware. Design trade-offs include radio-burst current, supply-noise coupling, and the duty cycle of data transmission. Place local decoupling close to the MCU and separate radio and digital return paths to reduce noise interaction.
推薦
Portable Measurement Instrument
The STM32L071KBU6 is appropriate for compact handheld measurement instruments where a 32-bit control processor, local data buffering, and a small footprint are more important than high-performance computation. Its 20 KB of SRAM supports temporary acquisition and processing tasks, while 128 KB of Flash can hold firmware, configuration, and calibration parameters. The low-voltage operating range enables integration with precision analog and sensor circuitry, although the selected analog front end must remain compatible with the MCU's supply limits and pin functions. Layout should separate sensitive measurement paths from digital return currents and follow the manufacturer's decoupling recommendations. Confirm peripheral specifications and analog-related timing in the official datasheet.
推薦
Home Automation Controller
The STM32L071KBU6 supports compact home-automation controllers that manage local inputs, outputs, and low-rate communications. Its 32 MHz Cortex-M0+ core provides sufficient control capability for state machines and protocol handling, while the 128 KB Flash and 20 KB SRAM accommodate moderate application complexity. The 32-pin UFQFPN footprint is useful in products where enclosure space is constrained. When adding relays, LED drivers, or external radio hardware, separate high-current paths from sensitive control traces and use appropriate protection. Validate every GPIO's alternate-function assignment and operating limits against the manufacturer pin table before schematic release.
推薦
Wearable or Health Device
The STM32L071KBU6 can fit wearable and personal-health accessories where a small package, low-voltage operation, and efficient Arm Cortex-M0+ processing are valuable. Its 5 mm by 5 mm UFQFPN footprint supports compact board layouts, while 128 KB of Flash and 20 KB of SRAM support compact control firmware, sensor orchestration, and short-term data handling. The device is suitable only after the complete battery budget, active-current profile, and standby behavior meet the product's requirements. Use a clean regulator arrangement, short return paths, and careful antenna or sensor isolation to maintain signal quality. Compliance requirements for the finished health product are separate from the MCU's RoHS3 status.
推薦
推薦產品摘要
工程參考資料，適用於 STM32L071KBU6 — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 |
|---|---|
| Brand | STMicroelectronics |
| Package | 32-pin UFQFPN, 5 mm x 5 mm |
| Processor Core | Arm Cortex-M0+ |
| Maximum CPU Frequency | 32 MHz |
| Flash Memory | 128 KB |
| SRAM | 20 KB |
| Operating Voltage Range | 1.65 V to 3.6 V |
| Architecture | 32-bit RISC |
| RoHS Status | RoHS3 compliant |
主要差異化特點
- Higher Flash capacity within the STM32L071 footprint-compatible family (對比STM32L071K8U6)
- Compact 5 mm by 5 mm surface-mount implementation (對比STM32L071K8T6)
- Low-voltage Arm Cortex-M0+ processing platform (對比STM32L051K8T6)
設計說明
Follow the manufacturer land pattern for the 32-pin UFQFPN package and preserve the exposed-pad geometry. Place supply-decoupling capacitors close to their designated pins, use short ground returns, and keep sensitive analog traces away from digital and switching-current paths. The exposed pad is part of the thermal and electrical design; confirm its net connection, solder-process requirements, and copper area in the package documentation before fabrication.
Design the supply around the device's 1.65 V to 3.6 V operating range and confirm separate power-domain sequencing, voltage limits, and current demand from the datasheet. Place local high-frequency bypass capacitance at the supply pins and use a regulator whose transient response suits the load. In battery systems, calculate average current from the complete active and sleep cycle rather than using maximum CPU frequency as the sole design point.
Do not treat a same-footprint STM32L071 member as an automatic equivalent: Flash capacity and firmware constraints can differ even when the package and CPU frequency match. Verify boot configuration, oscillator settings, peripheral assignments, alternate functions, and exposed-pad connections for the exact suffix. After replacement, rebuild the image, check the memory map, retest low-power transitions, and confirm production programming and boundary-scan behavior.
Keep the 32 MHz clock path short and return it through a continuous ground reference, while separating clock, sensor, and communications routes from high-current loads. Use the package pin table to identify all supply, ground, reset, boot, and debug functions before routing. Because compact UFQFPN land patterns can hide assembly risk, review courtyard clearance, solder mask, paste coverage, and the exposed-pad stencil with the assembler.
合規資訊
The component listing identifies RoHS3 compliance. Reach, lead-free status, halogen-free status, and conflict-minerals status are not specified in the available product information.
