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STM32L432KBU6

STM32L432KBU6

STMicroelectronics
ARM® Cortex®-M4 STM32L4 Microcontroller IC 32-Bit 80MHz 128KB (128K x 8) FLASH 32-UFQFPN (5x5)
Active2,478 in stock
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Overview

The STM32L432KBU6 is an ultra-low-power microcontroller based on the ARM Cortex-M4 core with an FPU, operating at up to 80MHz. It integrates 256KB of Flash memory and 64KB of SRAM within a compact 32-pin UFQFPN package. This MCU features a comprehensive set of peripherals and flexible power control, making it suitable for battery-powered applications requiring robust processing capabilities.

Why Choose This Part

Engineers benefit from the STM32L432KBU6's exceptional power efficiency, with multiple low-power modes down to 7.82uA in Shutdown mode, crucial for battery-powered designs. The 80MHz ARM Cortex-M4 core with FPU and DSP instructions offers robust performance for demanding embedded applications. Its comprehensive peripheral set and compact 5x5mm UFQFPN32 package simplify integration into space-constrained designs.

Applications

Wearable Devices
Its low-power modes (down to 7.82uA in Shutdown mode) and small 5x5mm package make it ideal for power-constrained wearable electronics.
Smart Sensors
The integrated ADCs (10x12b), DACs (2x12b), and capacitive sensing capabilities support various smart sensor applications with efficient data acquisition.
Industrial Control Panels
The 80MHz Cortex-M4 core with DSP instructions and connectivity options like CANbus and SPI provides sufficient processing and communication for compact industrial control interfaces.
Portable Medical Devices
Its ultra-low power consumption and multiple low-power modes are critical for extending battery life in portable medical instruments and health monitors.
IoT End Nodes
The combination of low power, a robust ARM Cortex-M4 core, and peripherals like QSPI and UART/USART makes it well-suited for battery-operated IoT end nodes that require local processing and secure data handling (e.g., via random number generator).

Key Specifications

Speed 80MHz
RAM Size 64K x 8
Core Size 32-Bit
Peripherals Brown-out Detect/Reset, DMA, PWM, WDT
Connectivity CANbus, I2C, IrDA, LINbus, QSPI, SAI, SPI, SWPMI, UART/USART, USB
Mounting Type Surface Mount
Number of I/O 26
Core Processor ARM Cortex-M4
Package / Case 32-UFQFN Exposed Pad
Data Converters A/D 10x12b; D/A 2x12b
Oscillator Type Internal
Program Memory Size 128KB (128K x 8)
Program Memory Type FLASH
Operating Temperature -40degC ~ 85degC (TA)
Supplier Device Package 32-UFQFPN (5x5)
Voltage - Supply (Vcc/Vdd) 1.71V ~ 3.6V

Getting Started

STMicroelectronics provides a complete development ecosystem, including the STM32CubeIDE for development and debugging. Engineers can use the NUCLEO-L432KC development board, which is pin-compatible with this MCU, for rapid prototyping. The extensive STM32Cube software package, including HAL and LL libraries, simplifies peripheral configuration and application development.

Dev Boards

Development boards and breakout modules featuring the STM32L432KBU6 or compatible chips — ready to use for prototyping.

NUCLEO-L432KC STMicroelectronics
Development Boards & Kits - ARM STM32 Nucleo-32 dev board STM32L432KC, supports Arduino nano conn
Digi-Key Mouser 2,384 in stock
NUCLEO-L476RG STMicroelectronics
Development Boards & Kits - ARM STM32 Nucleo-64 development board STM32L476RG MCU, supports Arduino & ST morpho
Digi-Key Mouser 3,059 in stock

STM32L432 Family

Comparing specs that differ across variants. The current part is highlighted.

Part Number Flash Stock
STM32L432KBU6 (this part) 128KB 2,478
STM32L432KCU6 256KB 7,265

Also Consider

STM32L412KBU6 STMicroelectronics - This part offers a similar ultra-low-power Cortex-M4 core with a smaller 128KB Flash, potentially reducing cost for applications with less code storage requirement.
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