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STM32L433CBU6

STM32L433CBU6

STMicroelectronics
ARM® Cortex®-M4 STM32L4 Microcontroller IC 32-Bit 80MHz 128KB (128K x 8) FLASH 48-UFQFPN (7x7)
Active2,059 in stock
Datasheet Digi-Key Compare Prices

Overview

The STM32L433CBU6 is an ultra-low-power microcontroller based on the high-performance ARM Cortex-M4 32-bit RISC core operating at up to 80MHz. This MCU integrates 256KB of Flash memory and 64KB of RAM, featuring a dedicated FPU and DSP instructions to handle complex processing tasks with minimal energy consumption. It is specifically designed for power-sensitive applications requiring sophisticated power management and integrated peripheral support.

Why Choose This Part

This MCU offers exceptional efficiency with a Run current of approximately 8.53mA at 80MHz and a Shutdown mode that draws only 8nA. The inclusion of the ART Accelerator and FlexPowerControl allows for high-performance execution from Flash while optimizing power consumption based on the required workload. Integrated features like a hardware RNG, LCD driver, and capacitive sensing channels reduce external component count and PCB footprint.

Applications

Battery-Powered Wearables
Utilizes ultra-low-power modes like Shutdown and Standby to extend the life of compact devices such as fitness trackers and smartwatches.
Industrial Sensor Nodes
Ideal for remote monitoring stations where high-efficiency processing and low-power run modes are required for long-term field deployment.
Portable Medical Devices
The integrated 12-bit ADC and hardware FPU enable precise signal processing for handheld diagnostic tools and patient monitors.
Smart Metering
Leverages the built-in LCD driver (up to 8x40 or 4x44) to drive segmented displays directly without an external controller.

Key Specifications

Speed 80MHz
RAM Size 64K x 8
Core Size 32-Bit
Peripherals Brown-out Detect/Reset, DMA, LCD, PWM, WDT
Connectivity CANbus, I2C, IrDA, LINbus, MMC/SD, QSPI, SAI, SPI, SWPMI, UART/USART, USB
Mounting Type Surface Mount
Number of I/O 38
Core Processor ARM Cortex-M4
Package / Case 48-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 48-UFQFPN (7x7)
Voltage - Supply (Vcc/Vdd) 1.71V ~ 3.6V

Getting Started

Start development using the STM32CubeL4 software package and the STM32CubeIDE for code generation and debugging. For hardware prototyping, use the NUCLEO-L433RC-P development board which provides an integrated ST-LINK debugger and Arduino Uno V3 connectivity. The part is fully compatible with the STM32 ecosystem, supporting industry-standard toolchains like Keil MDK and IAR Embedded Workbench.

Dev Boards

Development boards and breakout modules featuring the STM32L433CBU6 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
B-L4S5I-IOT01A STMicroelectronics
SPBTLE-RF, STM32L4S5 STM32L4+ 802.11 b/g/n (WiFi/WLAN/Wi-Fi 4), Bluetooth® Smart 4.x Low Energy (BLE) Transceiver 2.4GHz
Digi-Key 171 in stock
NUCLEO-L476RG STMicroelectronics
Development Boards & Kits - ARM STM32 Nucleo-64 development board STM32L476RG MCU, supports Arduino & ST morpho
Digi-Key Mouser 3,931 in stock
NUCLEO-L496ZG STMicroelectronics
STM32L496 Nucleo-144 STM32L4 ARM® Cortex®-M4 MCU 32-Bit Embedded Evaluation Board
Digi-Key 93 in stock
Part of STM32 family » STM32L433

STM32L433 Family

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

Part Number Peripherals I/O Pins Package ADC/DAC Flash Stock
STM32L433CBU6 (this part) Brown-out Detect/R.. 38 UFQFN-48 A/D 10x12b; D/A 2x.. 128KB 2,059
STM32L433VCT6 Brown-out Detect/R.. 83 LQFP-100 A/D 16x12b; D/A 2x.. 256KB 421
STM32L433CCU6 Brown-out Detect/R.. 38 UFQFN-48 A/D 10x12b; D/A 2x.. 256KB 1,257
STM32L433RCT6 Brown-out Detect/R.. 52 LQFP-64 A/D 16x12b; D/A 2x.. 256KB 282
Also available as: STM32L433CCT6

Also Consider

STM32L431CBU6 STMicroelectronics - A pin-compatible alternative for applications that do not require the integrated LCD driver.
ATSAML21G18B-MUT MCHPMicrochip Technology - An alternative ARM Cortex-M0+ ultra-low-power MCU with comparable memory and low active current specifications.
STM32L476RGT6 STMicroelectronics - Offers more Flash memory and a wider range of digital peripherals if the 256KB limit of the L433 is insufficient.

Categories

Microcontrollers > ARM Cortex-M4 Microcontrollers > STMicroelectronics Wearables & Medical > Ultra-Low Power MCUs