STM32L476RGT3 - 80MHz Cortex-M4 MCU | STMicroelectronics
料号： STM32L476RGT3 ✓ 量产中STM32L476RGT3 概述
A microcontroller is a programmable system-on-chip that integrates a processor core, memory, peripherals, and communication interfaces into one compact device. The STM32L4 family belongs to the hierarchy of 32-bit microcontroller, embedded processor, Arm Cortex-M microcontroller, and power management-aware embedded controller. These devices combine real-time control capabilities with low-power operating modes for industrial, consumer, medical, and connected equipment.
The STM32L476RGT3 provides 100 DMIPS performance and includes USB OTG FS, LCD support, and an external switched-mode power supply option. Its 1 MB Flash supports larger embedded applications, while 128 KB of SRAM allows more complex working data. The 80 MHz Cortex-M4 core includes single-precision floating-point hardware for control loops, signal processing, and other arithmetic-intensive tasks without relying entirely on software floating-point routines.
Its low-power architecture supports demanding embedded workloads while reducing energy use during idle and low-activity periods. Integrated communication and control peripherals reduce the need for external devices, making the MCU suitable for human-interface equipment, data acquisition, connected sensors, and compact industrial controllers. USB OTG FS is particularly useful for USB-connected portable products, configuration tools, and firmware update workflows.
Typical uses include building automation controllers, portable medical monitors, USB data-acquisition equipment, industrial control panels, low-power sensor hubs, and connected human-interface devices. The 64-LQFP package also provides enough pins for external memories, display interfaces, analog inputs, and general-purpose I/O while remaining compatible with conventional leaded assembly and inspection processes.
Designers should assign pinmuxing, clocks, low-power modes, and peripheral instances in the STM32CubeMX environment and confirm the selected peripheral pins in the manufacturer pinout and alternate-function tables. The USB data path requires careful routing and decoupling, while ADC and communications signals should be separated from noisy switching paths to improve signal integrity.
This product page organizes the key MCU specifications, genuine same-package replacement options, application guidance, comparison parameters, and practical PCB design notes into one engineering-focused reference for evaluating the STM32L476RGT3.
直接替换替代料： STM32L476RGT3 ——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： STM32L476RGT3 （相同外形与封装尺寸） ——差异在于 Package, Performance, ADC Resolution, Flash Memory, LCD Controller.
STM32L476RGT6
✅ 直接替换 ⚠️ 规格未核验联系询价
查看数据手册 →STM32L476RET6
✅ 直接替换 ⚠️ 规格未核验联系询价
查看数据手册 →STM32L476RCT6
✅ 直接替换 ⚠️ 规格未核验联系询价
查看数据手册 →STM32L476RBT6
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
STM32L476RAT6
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
STM32L476RGT3 最大额定值与电气特性
| Product Type | 32-bit ultra-low-power microcontroller |
| Processor Core | Arm Cortex-M4 with FPU |
| Maximum CPU Frequency | 80 MHz |
| Performance | 100 DMIPS |
| Flash Memory | 1 MB |
| SRAM | 128 KB |
| Instruction Set | 32-bit RISC |
| USB Interface | USB OTG FS |
| Display Support | LCD controller |
| Power Architecture | External SMPS option |
| 封装 | 64-LQFP (10 x 10 mm) |
| 引脚数量 | 64 pins |
| 安装类型 | Surface mount |
| Shipping Package | Tray |
| Operating Voltage | 1.8 V, 2.5 V, or 3.3 V |
| ADC Resolution | 12-bit |
STM32L476RGT3 tray 引脚配置指南
STM32L476RGT3（tray 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： STM32L476RGT3.
请参阅 数据手册 以查看完整引脚配置。
典型应用
STM32L476RGT3 适用于 6 应用s: USB Data-Acquisition Controller, Industrial Sensor Gateway, Battery-Powered Portable Monitor, Human-Machine Interface Controller, Low-Power Sensor Hub, USB-C Configured Embedded Product.
USB Data-Acquisition Controller
STM32L476RGT3 fits a USB data-acquisition controller because its 80 MHz Arm Cortex-M4 core can process sensor data while USB OTG FS provides a direct host interface. The 1 MB Flash accommodates drivers, buffering, configuration, and firmware-update functions, while 128 KB of SRAM supports active working sets. Place USB D+ and D- on a controlled impedance route, provide the required transceiver and connector implementation, and keep analog inputs away from high-current switching nodes. Validate the complete USB electrical path, grounding, and firmware update workflow before production.
推荐
Industrial Sensor Gateway
STM32L476RGT3 is suitable for an industrial sensor gateway that aggregates readings from multiple low-speed sensors and forwards them through a serial or USB connection. Its 80 MHz Cortex-M4 FPU supports filtering and control calculations, and the 128 KB SRAM reduces reliance on external memory. The 1 MB Flash provides room for protocol stacks, diagnostics, and update images. Engineers should use buffered sensor inputs, isolate analog grounds according to the system power architecture, and define recovery behavior for communications interruptions and interrupted firmware upgrades.
推荐
Battery-Powered Portable Monitor
STM32L476RGT3 fits a battery-powered portable monitor where a compact 64-LQFP controller must combine sensing, display control, data storage, and low-power behavior. The ultra-low-power architecture supports low-activity operating states, while the Cortex-M4 FPU handles filtering and trend calculations. Its 128 KB SRAM allows local buffering and the 1 MB Flash supports firmware and configuration data. Select the appropriate temperature grade, minimize always-on peripherals, and measure the complete assembled product because sensor bias current and display load can dominate the system energy budget.
推荐
Human-Machine Interface Controller
STM32L476RGT3 can control a human-machine interface with LCD, buttons, encoders, status LEDs, and communications. The integrated LCD controller reduces external graphics-controller overhead, and the 80 MHz Cortex-M4 core provides enough performance for responsive input handling and local logic. The 64-LQFP package provides a useful mix of GPIO and peripheral pins for display interfaces and control signals. Engineers should reconcile all alternate functions in the pinout, keep display and switching supplies separated where possible, and validate timing through the manufacturer peripheral documentation.
推荐
Low-Power Sensor Hub
STM32L476RGT3 is appropriate for a low-power sensor hub that periodically reads environmental or condition sensors and combines several interfaces behind a common controller. The low-power MCU architecture can remain between measurement bursts, while the Cortex-M4 FPU handles calibration and filtering. Its 1 MB Flash supports multiple protocol stacks and a bootloader, and 128 KB of SRAM can accommodate measurement buffers. Configure unused GPIOs and peripherals correctly, avoid continuous high-speed clocking where unnecessary, and confirm wake sources and peripheral retention behavior against the selected operating mode.
推荐
USB-C Configured Embedded Product
STM32L476RGT3 fits a modern connected product requiring USB device connectivity, firmware maintenance, and embedded control in one component. USB OTG FS supports a direct device or dual-role design when the board-level role and protection strategy are implemented correctly. The 80 MHz core can manage control tasks while the 1 MB Flash stores application code and 128 KB of SRAM handles working memory. Use a compliant USB routing and power-delivery architecture, validate enumeration across operating temperatures, and include a recovery path that can restore firmware over USB.
推荐
推荐产品汇总
工程参考数据： STM32L476RGT3 ——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 | STM32L476RGT6 | STM32L476RET6 | STM32L476RCT6 | STM32L476RBT6 | STM32L476RAT6 |
|---|---|---|---|---|---|---|
| Package | 64-LQFP (10 x 10 mm) | 64-LQFP (10 x 10 mm) | 64-LQFP (10 x 10 mm) | 64-LQFP (10 x 10 mm) | 64-LQFP (10 x 10 mm) | 64-LQFP (10 x 10 mm) |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics |
| Flash Memory | 1 MB | 1 MB | 512 KB | 256 KB | 128 KB | 64 KB |
关键差异点
- Full 1 MB Flash configuration （对比 STM32L476RBT6)
- Substantial SRAM for embedded working sets （对比 STM32L476RAT6)
- Native USB OTG FS and LCD connectivity （对比 STM32L476RET6)
设计说明
Configure the MCU power architecture and external SMPS option according to the manufacturer reference schematics rather than treating all STM32L476 variants as electrically identical. Check the required internal regulator modes, voltage ranges, decoupling values, and power-supply sequencing against the manufacturer datasheet. Keep analog, digital, and USB supply paths appropriately partitioned, and validate cold-start, reset, and low-power transitions on the assembled PCB.
Route USB D+ and D- as a controlled-impedance differential pair with continuous reference-plane support, minimized stubs, and symmetrical component placement. Place USB protection and series-resistor networks close to the controller pins when required. Avoid routing the pair across split power or ground planes, and keep switching nodes and high-current return paths away from the interface because these errors can affect enumeration and signal integrity.
Do not infer a valid replacement solely from the 64-pin footprint. Before fitting STM32L476RGT3 or another STM32L476R-series device, compare Flash capacity, SRAM, temperature grade, pin multiplexing, clock configuration, USB function availability, and package drawing. Lower-density alternatives require linker and firmware review even when the board outline is identical, and production substitutions should receive the same clock, reset, peripheral, and boundary-condition validation as the original device.
合规信息
The manufacturer documents feature the STM32L476RG device family, but no explicit compliance declarations were identified for the exact STM32L476RGT3 ordering code.
