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STMicroelectronics STM32L433RBY6TR — Microcontrollers & Processors (MCU / MPU / DSP)
STMicroelectronics

ST STM32L433RBY6TR ARM Cortex-M4 MCU, 80MHz, 128KB Flash

MPNSTM32L433RBY6TR
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ST STM32L4 series, ARM Cortex-M4 32-bit MCU, 80MHz, 128KB Flash, 64KB RAM, CANbus, USB, I²C, SPI, 52 I/O, 64-WLCSP, -40 to 85°C.

$5.8200Ref. price · indicative, final on quote
STM32L433RBY6TR datasheet
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Specifications

STM32L433RBY6TR Technical Specifications
ParameterValue
SeriesSTM32L4
Mounting typeSurface Mount
Oscillator typeInternal
Program memory typeFLASH
Voltage - supply (Vcc (Vdd))1.71V ~ 3.6V
Operating temperature-40°C ~ 85°C (TA)
Speed80MHz
PackageTape & Reel (TR) Cut Tape (CT)
RAM size64K x 8
Core size32-Bit Single-Core
PeripheralsBrown-out Detect/Reset, DMA, LCD, PWM, WDT
ConnectivityCANbus, I²C, IrDA, LINbus, MMC/SD, QSPI, SAI, SPI, SWPMI, UART/USART, USB
Number of i (O)52
Core processorARM® Cortex®-M4
Case64-UFBGA, WLCSP
Data convertersA/D 16x12b; D/A 2x12b
Program memory size128KB (128K x 8)

Product details

80 MHz Cortex-M4 in a 3.14 mm² WLCSP — what that means for your board

The STM32L433RBY6TR is an STMicroelectronics 32-bit ARM Cortex-M4 MCU clocked at 80 MHz, with 128 KB of Flash and 64 KB of RAM. It belongs to the STM32L4 series.

Temperature range and operating environment

Rated for -40 to 85 °C ambient, this part fits industrial control cabinets and outdoor telecom enclosures. The 1.71 V to 3.6 V supply range lets it run directly from a single Li-ion cell.

What the 80 MHz and 128 KB Flash mean for your firmware budget

The 80 MHz Cortex-M4 handles real-time control loops without needing a separate DSP. The 128 KB Flash supports a FreeRTOS-based application with a USB stack and CANopen protocol.

Peripherals and integration note

On-chip peripherals include a brown-out detect/reset, DMA controller, LCD driver, PWM timers, and a watchdog. The 16-channel 12-bit ADC and dual 12-bit DAC cover analog front-end needs.

Frequently asked questions

What is the pinout of STM32L433RBY6TR?

The 64-WLCSP pinout follows the STM32L433 standard ball map. The datasheet (available from ST) shows the full pin assignment; key signals include the 52 GPIOs, the 16 ADC inputs on Port A/B/C, and the CAN/USB/I²C/SPI pins multiplexed across Port A and B.

Does STM32L433RBY6TR support USB and CAN?

Yes, the connectivity block includes both a full-speed USB device interface and a CAN 2.0B controller. They share pins with other peripherals, so check the pin mux in the datasheet before laying out the board.

What are the alternatives to STM32L433RBY6TR?

Within the STM32L4 series, pin-compatible WLCSP variants with larger Flash (256 KB or 512 KB) are available — for example, the STM32L443 or STM32L4R5 families. No direct second-source from another manufacturer exists.