STM32L4R5QII6 - 120MHz Cortex-M4 MCU | STMicroelectronics
MPN： STM32L4R5QII6 ✓ 啟用中STM32L4R5QII6 概覽
An ultra-low-power microcontroller is an embedded processing device designed to maintain useful computation while minimizing energy use. The STM32L4+ architecture combines a microcontroller, real-time control capability, data storage, and communication peripherals within a single silicon device. Its low-power design is intended for battery-powered, industrial, sensor, and connected products where energy efficiency contributes directly to battery life or heat management.
Key features include operation from a 1.71 V to 3.6 V power supply, a maximum core frequency of 120 MHz, and low-power consumption figures including 305 nA in VBAT mode for the RTC and backup registers and 33 nA in shutdown mode. The STM32L4R5QII6 also provides 110 I/O, USB OTG, an FPU, and DFSD capability, allowing one device to control peripherals, acquire data, and communicate with a host or service interface.
The device combines 2 MB of Flash with 640 KB of SRAM to support firmware, boot code, data logging, graphics buffers, and real-time control workloads. Its Arm Cortex-M4 processor supports single-precision floating-point instructions, which accelerates control calculations and digital filtering without requiring a separate accelerator. The STM32L4+ low-power feature set includes FlexPowerControl, Batch Acquisition Mode, and dedicated backup-domain functions.
Typical applications include industrial sensor nodes, compact data loggers, USB-connected instrumentation, low-power condition-monitoring equipment, and embedded control products with limited board area. The 7 x 7 mm UFBGA package supports dense designs, but it requires careful PCB layout, controlled assembly, and reliable power and decoupling networks to achieve predictable low-noise operation.
Power design should preserve the 1.71 V to 3.6 V operating range and place the required bypass capacitors close to the supply and ground pins. Firmware and board validation should also account for the 110 I/O limit and the high pin density of the 132-pin package. Use the manufacturer pin-description and land-pattern tables when assigning tracks and planning assembly.
This page combines manufacturer specifications, package details, drop-in candidates, application guidance, and engineering-oriented design notes to support MCU selection, PCB planning, firmware bring-up, and sourcing decisions.
直接替換替代品，適用於 STM32L4R5QII6 — 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： STM32L4R5QII6 （相同外形與佔位） — 差異在於 Flash Memory, Package, Processor Core.
STM32L4R5QII6P
✅ 直接替換📋 參考替代品（不在目錄中）
STM32L4S5QII6
✅ 直接替換聯絡詢價
查看資料表 →STM32L4R5QGI6TR
✅ 直接替換📋 參考替代品（不在目錄中）
STM32L4R5QGI6
✅ 直接替換聯絡詢價
查看資料表 →STM32L4R5QII6 最大額定值與電氣特性
| Product Type | Ultra-low-power 32-bit microcontroller |
| Processor Core | Arm Cortex-M4 |
| Maximum CPU Frequency | 120 MHz |
| Architecture | 32-bit RISC |
| Flash Memory | 2 MB |
| SRAM | 640 KB |
| 工作電源電壓 | 1.71 V to 3.6 V |
| 工作溫度範圍 | -40 °C to 85 °C / 125 °C |
| VBAT Mode Current | 305 nA |
| Shutdown Mode Current | 33 nA |
| Number of I/O | 110 I/O |
| Floating-Point Unit | FPU |
| USB Interface | USB OTG |
| Digital Filter for Sigma-Delta Modulators | DFSD |
| Power Control Technology | FlexPowerControl |
| Acquisition Mode | Batch Acquisition Mode (BAM) |
| 封裝 | 132-pin UFBGA, 7 x 7 mm |
| 安裝類型 | Surface mount |
STM32L4R5QII6 132-pin ufbga, 7 x 7 mm 腳位配置指南
STM32L4R5QII6（132-pin ufbga, 7 x 7 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： STM32L4R5QII6.
請參閱 資料表 以查看完整腳位配置。
典型應用
STM32L4R5QII6 適用於 6 應用s: Industrial Sensor Node, USB Connected Instrumentation, Low-Power Data Logger, Precision Sensor Interface, Battery-Powered Condition Monitor, Compact Embedded Control System.
Industrial Sensor Node
The STM32L4R5QII6 fits industrial sensor nodes that periodically acquire measurements and must preserve a compact, low-power control architecture. Its 120 MHz Arm Cortex-M4 core and FPU support signal filtering and local compensation, while 640 KB of SRAM can hold acquisition buffers and 2 MB of Flash can accommodate firmware, calibration data, and communications logic. The 1.71 V to 3.6 V supply range supports low-voltage industrial designs. Its 305 nA VBAT mode can maintain RTC and backup registers between active measurement intervals, while the 132-pin UFBGA preserves board area in densely populated sensing equipment.
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USB Connected Instrumentation
The STM32L4R5QII6 is suitable for USB-connected instrumentation that combines control, data acquisition, and host communication in one device. USB OTG provides an integrated peripheral path, while the 120 MHz Cortex-M4 core and single-precision FPU can process calibration and measurement algorithms. The 2 MB of Flash supports larger embedded applications than a small MCU configuration, and 640 KB of SRAM provides working space for USB buffers and real-time data handling. Its low-power shutdown and VBAT modes also make it useful for portable test instruments that spend substantial time between measurement cycles.
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Low-Power Data Logger
The STM32L4R5QII6 supports low-power data loggers where long standby periods and efficient acquisition are more important than continuous maximum-rate processing. Its 2 MB of Flash provides room for buffered records, configuration data, and application firmware, while 640 KB of SRAM allows temporary storage during acquisition bursts. The 120 MHz Cortex-M4 core can execute compression, filtering, and timestamp handling between sleep periods. With 305 nA VBAT mode for RTC and backup functions and 33 nA shutdown operation, it supports designs where the battery budget is dominated by wake, measure, store, and sleep cycles.
推薦
Precision Sensor Interface
The STM32L4R5QII6 is well suited to precision sensor interfaces requiring fast sampling, digital filtering, and compact embedded control. DFSD support provides a dedicated path for suitable sigma-delta modulator data, while the FPU accelerates filtering and correction calculations at the 120 MHz core frequency. The 1.71 V to 3.6 V operating range permits integration with low-energy analog and sensor circuits. Its 110 I/O allows connection of sensors, status indicators, and local controls, although the dense 132-pin UFBGA requires careful escape routing and a deliberate power-ground layout.
推薦
Battery-Powered Condition Monitor
The STM32L4R5QII6 fits battery-powered condition-monitoring equipment that must remain responsive while consuming little power between events. The STM32L4+ low-power architecture includes 305 nA VBAT mode for the RTC and backup registers and 33 nA shutdown mode, allowing the device to preserve timing information and manage a duty-cycled sensing schedule. Its 120 MHz Cortex-M4 core can evaluate thresholds and classify events after wake-up, while 2 MB of Flash and 640 KB of SRAM provide space for event logs and diagnostic state without requiring a separate storage controller.
推薦
Compact Embedded Control System
The STM32L4R5QII6 supports compact embedded control systems that combine real-time control, communications, and local data processing. The 120 MHz Cortex-M4 core with FPU supports motor, thermal, or process-control loops, while 2 MB of Flash accommodates control firmware and 640 KB of SRAM supports state machines and communication buffers. The 110 I/O count provides substantial peripheral connectivity for sensors, actuators, and human interfaces. Its 7 x 7 mm UFBGA package helps reduce board area, but high-density assembly makes land-pattern accuracy, thermal management, and manufacturing capability critical design constraints.
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推薦產品摘要
工程參考資料，適用於 STM32L4R5QII6 — 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 | STM32L4R5QII6P | STM32L4S5QII6 | STM32L4R5QGI6TR | STM32L4R5QGI6 |
|---|---|---|---|---|---|
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics |
| Processor Core | Arm Cortex-M4 | Arm Cortex-M4 | Arm Cortex-M4 | Arm Cortex-M4 | Arm Cortex-M4 |
| Maximum CPU Frequency | 120 MHz | 120 MHz | 120 MHz | 120 MHz | 120 MHz |
主要差異化特點
- Maintains full 120 MHz Cortex-M4 performance across the identified same-package alternatives (對比STM32L4S5QII6)
- Provides a documented 2 MB Flash configuration for firmware and embedded data (對比STM32L4R5QII6P)
- Combines 640 KB of SRAM with a 120 MHz FPU-capable Cortex-M4 core (對比STM32L4R5QGI6)
- Matches the 132-pin package class while retaining the same 120 MHz core speed (對比STM32L4R5QGI6TR)
設計說明
Use the manufacturer land pattern for the 132-pin 7 x 7 mm UFBGA and verify its exposed-pad connection before release. Place supply and ground bypass capacitors adjacent to the relevant pins, maintain short return paths, and provide adequate via access around the dense perimeter and thermal-pad area. The 110 available I/O should be allocated early because escape routing can become the limiting constraint in multi-layer layouts.
Design the regulator for the full 1.71 V to 3.6 V operating range and account for startup, load transients, and sleep-mode current at the board level. The MCU's 305 nA VBAT mode and 33 nA shutdown figures describe device operating modes, not complete product consumption. External pull resistors, sensors, communication hardware, regulators, and leakage can dominate the final standby current, so measure the assembled design across its intended modes.
Estimate junction heating from actual 1.71 V to 3.6 V supply conditions, output activity, and the UFBGA thermal path. Although the 120 MHz Cortex-M4 can perform substantial computation, low-power periods and balanced I/O activity can reduce continuous switching load. Validate the final assembly using the manufacturer thermal guidance, local copper, adjacent heat sources, and the enclosure rather than relying only on the maximum CPU frequency.
Do not treat an alternative MPN as interchangeable solely because it uses a 132-pin package. Confirm the device identifier, memory configuration, exposed-pad requirements, temperature grade, pin multiplexing, bootloader behavior, DFSD configuration, USB support, and peripheral mapping. After substitution, rebuild the firmware for the new device, verify all GPIO assignments, and rerun timing, low-power, USB, and analog acquisition tests on the target board.
Separate sensitive sensor and DFSD paths from high-switching digital nets, and keep return currents continuous beneath active circuitry. The Cortex-M4 FPU and DFSD features can support precision acquisition, but package density and fast edge rates still require controlled impedance and return-path planning. Apply the manufacturer's high-speed guidance when routing clocks, USB, communications, and memory interfaces, and keep test points accessible for signal-integrity validation.
合規資訊
Compliance status must be confirmed from the current declarations and product documentation for the exact orderable MPN. The cited operating-temperature range does not by itself establish AEC-Q100 qualification.
