STMicroelectronics STM32L4R5AII6

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Product attributes Property Value
Manufacturer STMicroelectronics
Product Series STM32L4
Packaging Tray | NULL
Core Processor ARM® Cortex®-M4
Core Size 32-Bit Single-Core
Speed 120MHz
Connectivity CANbus, EBI/EMI, I2C, IrDA, LINbus, MMC/SD, SAI, SPI, UART/USART, USB OTG
Peripherals Brown-out Detect/Reset, DMA, POR, PWM, WDT
Number of I/O 112
Program Memory Size 2MB (2M x 8)
Program Memory Type FLASH
EEPROM Size -
RAM Size 640K x 8
Voltage - Supply (Vcc/Vdd) 1.71V ~ 3.6V
Data Converters A/D 16x12b; D/A 2x12b
Oscillator Type Internal
Operating Temperature -40°C ~ 85°C (TA)
Grade -
Qualification AEC -
Mounting Type Surface Mount
Supplier Device Package 169-UFBGA (7x7)
Package / Case 169-UFBGA
ROHS RoHS Compliant - Hazardous Substance Free Electronic Components | HQICKEY

The STM32L4R5AII6 from STMicroelectronics is a high-performance ultra-low-power 32-bit microcontroller based on the ARM Cortex-M4 core with FPU. It runs at 120MHz and features 2MB of flash memory and 640KB of SRAM. Operating from 1.71V to 3.6V, it integrates a TFT-LCD controller, 24-bit ADC, DAC, comparators, and advanced low-power modes. Packaged in a 169-UFBGA, this MCU is designed for demanding applications in wearables, smart home, industrial IoT, and medical devices where performance and energy efficiency are critical.

  • Ultra-low power consumption: 100nA shutdown mode and dynamic voltage scaling extend battery life in portable devices.
  • High memory capacity: 2MB flash and 640KB SRAM support complex applications and over-the-air updates.
  • Advanced graphics support: Built-in TFT-LCD controller and Chrom-ART accelerator enable rich user interfaces without external GPU.
  • Rich analog integration: 24-bit ADC and DAC reduce external components for high-precision sensing.

High-End Wearable Devices

The ultra-low-power design (down to 100nA in shutdown) combined with 120MHz performance allows complex health monitoring algorithms to run on a coin-cell battery.

Smart Home Hubs

With 2MB flash and 640KB RAM, it can handle multiple communication protocols (BLE, Zigbee, Thread) simultaneously, while the LCD controller drives a touchscreen interface.

Industrial IoT Gateways

The rich analog peripherals (24-bit ADC, DAC, comparators) and DMA enable high-precision sensor data acquisition, while the Cortex-M4 FPU processes signals locally.

Portable Medical Imaging

Its high-speed ADC and DSP capabilities support ultrasound and OCT signal processing, while the low-power modes preserve battery life during field use.

Energy Harvesting Systems

The 1.71V minimum supply voltage allows direct operation from a single solar cell or TEG, with the brown-out detector ensuring stable startup.

Advanced Robotics Controllers

Multiple timers with PWM, quadrature encoder interfaces, and CAN FD support precise motor control and sensor fusion in autonomous robots.

Q: What is the core architecture?
A: It uses an ARM Cortex-M4 with FPU, running at up to 120MHz for efficient DSP and floating-point operations.
Q: How much memory is available?
A: It offers 2MB of flash and 640KB of SRAM, enabling large application code and data buffering.
Q: What is the supply voltage range?
A: It operates from 1.71V to 3.6V, supporting battery-powered and energy-harvesting designs.
Q: Does it support graphics?
A: Yes, it includes a TFT-LCD controller and Chrom-ART accelerator for GUI applications.
Base Product Number : STM32L4R5AII6
120MHz 2MB flash 32-bit MCU 640KB SRAM ARM Cortex-M4 IoT LCD controller STM32L4 UFBGA-169 ultra-low-power wearable
Q: What is the core architecture?
A: It uses an ARM Cortex-M4 with FPU, running at up to 120MHz for efficient DSP and floating-point operations.
Q: How much memory is available?
A: It offers 2MB of flash and 640KB of SRAM, enabling large application code and data buffering.
Q: What is the supply voltage range?
A: It operates from 1.71V to 3.6V, supporting battery-powered and energy-harvesting designs.
Q: Does it support graphics?
A: Yes, it includes a TFT-LCD controller and Chrom-ART accelerator for GUI applications.