STM32L476RGT6 - 80MHz Cortex-M4 1MB Flash MCU | STMicroelectronics
MPN: STM32L476RGT6 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.2 | $6.20 |
| 10 | $5.58 | $55.80 |
| 100 | $4.86 | $486.00 |
| 500 | $4.34 | $2,170.00 |
| 1,000 | $3.86 | $3,860.00 |
STM32L476RGT6 Overview
An ultra-low-power microcontroller (MCU) is a complete computing system on a single chip that combines a processor core, memory, and peripherals while minimizing energy consumption. Within the power-management hierarchy, devices like the STM32L476 sit in the STM32L4 series, positioned above the STM32L0/L1 families and below the high-performance STM32F4/H7 lines, targeting battery-powered and energy-harvesting embedded systems.
Key features include the Cortex-M4 with single-precision FPU and DSP instructions for efficient signal processing, six embedded SRAM banks totaling 128 KB with hardware parity checking, a ART accelerator for 0-wait-state execution from Flash, and dual-mode operation via the embedded ST-LINK-free boot loader. Dynamic efficiency is achieved through multiple low-power modes, flexible voltage scaling, and BOR-supervised operation from a 1.71 V to 3.6 V supply.
The peripheral set covers USB OTG FS device/host, an 8x to 48x segment LCD driver, three 12-bit ADCs (5 MSPS), two 12-bit DACs, a DFSDM digital filter for sigma-delta modulators, multiple SPI/I2C/UART interfaces, SAI audio, CAN, Quad-SPI for external memory, AES and HASH cryptographic accelerators, an RNG, and a RTC with calendar.
Typical applications include battery-powered meters and sensors, portable medical devices, IoT nodes, and human-machine interfaces with LCD displays. The combination of 1 MB Flash and ultra-low active current suits designs needing both code headroom and long battery life.
Design consideration: leverage the flexible Stop mode with selectable wake-up peripherals, and budget Flash wait states versus VOS voltage scaling to balance 80 MHz performance against lowest dynamic current.
This page synthesizes distributor pricing, drop-in alternatives, pin-compatibility notes, and practical design guidance not found in a single manufacturer datasheet.
Drop-in alternatives for STM32L476RGT6 β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with STM32L476RGT6 (same form factor and footprint) β differing in Package, Flash Memory, SRAM, Core, ADC Resolution.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
STM32L486RGT6
β Drop-In β οΈ εζ°εΎ ιͺθ―β In Stock
$8.5 / Unit
View Datasheet βSTM32L4A6RGT6
β Drop-In β οΈ εζ°εΎ ιͺθ―β In Stock
$9.56 / Unit
View Datasheet βSTM32L471RGT6
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
STM32L476RGT7
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
STM32L476RBT6
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
STM32L476RCT6
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
STM32L476RGT6 Maximum Ratings & Electrical Characteristics
| Core Processor | ARM Cortex-M4 with FPU |
| Core Size | 32-bit |
| Maximum Clock Frequency | 80 MHz |
| Performance | 100 DMIPS |
| Flash Memory | 1 MB (1M x 8) |
| SRAM | 128 KB |
| Supply Voltage Range | 1.71 V to 3.6 V |
| Peripherals | USB OTG FS, LCD, DFSDM, AES, HASH, RNG, CAN, Quad-SPI |
| Connectivity | CANbus, I2C, IrDA, LIN, SPI, UART/USART, USB |
| ADC Resolution | 12-bit (up to 5 MSPS) |
| DAC Resolution | 12-bit, 2 channels |
| LCD Controller | Up to 8x48 or 4x52 segments |
| Operating Temperature | -40C to +85C |
| Package | 64-LQFP (10 x 10 mm) |
| Mounting Type | Surface Mount |
| Series | STM32L4 |
STM32L476RGT6 64-lqfp (10 x 10 mm) Pin Configuration Guide
Pin configuration for STM32L476RGT6 (64-lqfp (10 x 10 mm) package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for STM32L476RGT6.
Refer to the datasheet for full pin configuration.
Typical Applications
STM32L476RGT6 is suitable for 6 applications: Battery-Powered Smart Meters, Portable Medical Devices, IoT Sensor Nodes, Human-Machine Interfaces with LCD, Industrial Sensing and Condition Monitoring, USB Peripherals and Consumer Electronics.
Battery-Powered Smart Meters
The STM32L476RGT6 fits smart electricity, water, and gas meters because its ultra-low-power architecture pairs a 1 MB Flash code budget with extended-life battery operation. Multiple Stop and Standby modes with SRAM retention let the meter sleep between measurement intervals, while the RTC and wake-up peripherals time Tariff switching. The dual 12-bit DACs and three 12-bit ADCs up to 5 MSPS handle analog front-end duties for metering circuits, and the segment LCD driver directly drives the customer display without an external LCD controller. On the 1.71 V to 3.6 V rail, the design runs directly from a lithium cell, reducing BOM cost. According to ST's application positioning, the STM32L4 series is specifically targeted at metering, making this MCU a strong single-chip fit for 10-20 year battery targets when duty-cycled appropriately.
Recommended
Portable Medical Devices
Portable and wearable medical instruments such as glucose monitors, pulse oximeters, and portable ECG recorders benefit from the STM32L476RGT6's combination of the Cortex-M4 with FPU and DSP instructions, which executes FFT-based biopotential analysis efficiently at low energy. The DFSDM peripheral digitizes external sigma-delta modulators used in precision biopotential front ends, offloading filtering from software. Ultra-low-power modes preserve patient data in 128 KB SRAM between acquisition bursts, and the USB OTG FS port enables direct data offload to clinic PCs or charging cradles without extra bridge chips. The -40C to +85C industrial temperature range covers autoclave-adjacent storage conditions. With 1 MB Flash, algorithm libraries and regulatory-mandated logging code coexist on-chip, avoiding external memory in compact, sealed medical housings where board area is critical.
Recommended
IoT Sensor Nodes
Battery-powered IoT sensor nodes leverage the STM32L476RGT6's dynamic efficiency: the Cortex-M4 processes edge analytics locally at 80 MHz, then the device returns to Stop mode to extend coin-cell or energy-harvesting budgets. The Quad-SPI interface memory-maps external serial Flash for large firmware images and OTA staging beyond the 1 MB on-chip Flash, while the AES accelerator encrypts MQTT/LoRa payloads in hardware at negligible energy cost. The RNG provides keys for secure provisioning, and multiple low-power UART/SPI/I2C interfaces connect radio modules and sensors. Because the node spends most time in low-power modes, the flexible voltage scaling and BOR-supervised 1.71 V operation directly translate into measurable battery-life gains, making this MCU a standard choice for commercial and industrial wireless sensing deployments per ST's ultra-low-power positioning.
Recommended
Human-Machine Interfaces with LCD
HMI panels for white goods, industrial controls, and thermostats use the STM32L476RGT6's embedded segment LCD driver, which supports up to 8x48 (or 4x52) segments with internal step-up contrast control, eliminating a dedicated LCD driver IC. The 80 MHz Cortex-M4 with FPU handles touch-sensing algorithms - the series integrates capacitive-touch support - while 1 MB Flash stores multi-language strings and GUI assets. The USB OTG FS port provides field firmware updates from a PC, and dual DACs generate buzzer tones or analog gauges. Because the LCD controller runs in low-power modes, display content stays visible while the core sleeps, cutting average current dramatically versus always-on MCUs. This single-chip integration of display, touch, USB, and analog is the core ST value proposition for L4-class HMIs.
Recommended
Industrial Sensing and Condition Monitoring
Vibration and acoustic condition-monitoring nodes use the STM32L476RGT6's DSP-capable Cortex-M4 and DFSDM to sample accelerometers and microphones through external sigma-delta modulators, computing FFT spectra and envelope analysis on-chip. Three 12-bit ADCs at up to 5 MSPS capture auxiliary process signals, and the CAN interface connects directly to factory fieldbuses, while the SAI peripheral handles audio-band diagnostic data. The -40C to +85C industrial grade and 1.71 V to 3.6 V tolerance survive electrically noisy plant environments when combined with standard protection. With 1 MB Flash, the FFT libraries and communication stack fit on-chip, and the AES/RNG hardware secures OTA firmware in connected factories. Duty-cycled acquisition with Stop-mode standby yields multi-year operation from battery or energy-harvesting supplies in remote installations.
Recommended
USB Peripherals and Consumer Electronics
USB-connected consumer devices - audio dongles, data loggers, PC accessories - exploit the STM32L476RGT6's integrated USB OTG FS with on-chip PHY for both device and host roles. The SAI audio interface streams I2S audio to external codecs, and ST's USB device libraries provide CDC, MSC, HID, and audio classes with DFU firmware update in the box. The 80 MHz Cortex-M4 with FPU runs protocol stacks and local signal processing concurrently, while 1 MB Flash accommodates feature-rich firmware plus upgrade staging. Dual 12-bit DACs and multiple timers support analog control and lighting effects. Battery-powered variants benefit from USB-charged operation with the L4 ultra-low-power modes between charging cycles. This reduces the bill of materials to one MCU plus a codec or sensor front end in cost-sensitive consumer designs.
Recommended
Recommended Products Summary
Engineering reference data for STM32L476RGT6 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | STM32L486RGT6 | STM32L471RGT6 | STM32L476RBT6 | STM32L476RCT6 |
|---|---|---|---|---|---|
| Package | 64-LQFP (10x10 mm) | 64-LQFP (10x10 mm) - same | 64-LQFP (10x10 mm) - same | 64-LQFP (10x10 mm) - same | 64-LQFP (10x10 mm) - same |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics |
| Core / Frequency | Cortex-M4 + FPU, 80 MHz | Cortex-M4 + FPU, 80 MHz | Cortex-M4 + FPU, 80 MHz | Cortex-M4 + FPU, 80 MHz | Cortex-M4 + FPU, 80 MHz |
| Flash | 1 MB | 1 MB | 1 MB | 128 KB | 256 KB |
| SRAM | 128 KB | 128 KB | 128 KB | 64 KB | 64 KB |
| LCD Controller | Yes (8x48 segments) | Yes (8x48 segments) | No | Yes (8x48 segments) | Yes (8x48 segments) |
| Crypto Accelerators | AES, HASH, RNG | AES, HASH, RNG (enhanced) | No crypto (RNG only) | AES, HASH, RNG | AES, HASH, RNG |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
Key Differentiators
- 1 MB Flash in the 64-pin footprint (vs STM32L476RBT6)
- Integrated LCD controller plus crypto (vs STM32L471RGT6)
- Cost-optimized memory scaling within same footprint (vs STM32L476RCT6)
Design Notes
Supply the STM32L476RGT6 from a 1.71 V to 3.6 V rail; for lowest power, select voltage Range 1 in the PWR peripheral, which caps the core at 26 MHz, and step to Range 1/2 boost mode before switching to 80 MHz. Place 100 nF ceramic decoupling capacitors on every VDD/VSS pair plus the VDDA pin, and fit the mandated VCAP capacitor per the ST datasheet. Estimated: at 3.3 V and typical 80 MHz active current of order 10 mA class, average current is dominated by duty cycle in Stop/Standby - budget firmware accordingly.
For the 64-LQFP 10x10 mm footprint, keep VDDA/VSSA on a quiet analog island separated from digital returns, with a ferrite or RC filter from the main 3.3 V rail when using the 5 MSPS ADCs or DFSDM. Route the 8 MHz HSE crystal with short traces, guard ring to GND, and load capacitors per crystal datasheet - typically 10-20 pF estimated from crystal CL. Keep USB D+/D- as a 90-ohm differential pair with 22-ohm series resistors close to the pins.
Do not enable 80 MHz operation without first configuring the power regulator and Flash wait states for the selected VOS range - illegal combinations cause hard faults, a documented pitfall in ST's STM32L4 reference manual RM0351. Also verify temperature-grade suffix: the T6 part is rated -40C to +85C only; for extended environments order the RGT7 grade. When swapping to the STM32L471RGT6 alternative, remember the LCD and AES/HASH peripherals are absent and will not enumerate.
Compliance Information
RoHS compliant and lead-free per STMicroelectronics product page and distributor listings. REACH compliance per ST declarations.
