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STMicroelectronics STM32L433RCI6 — Microcontrollers & Processors (MCU / MPU / DSP)

STM32L433RCI6 STM32L4 MCU, 80MHz Cortex-M4, 256KB Flash

MPNSTM32L433RCI6
Active

STMicroelectronics STM32L4 series, STM32L433RCI6, ARM Cortex-M4, 32-Bit Single-Core, 80MHz, 256KB Flash, 64K x 8 RAM, 1.71V ~ 3.6V, -40°C ~ 85°C, 64-UFBGA.

$6.3400Ref. price · indicative, final on quote
STMicroelectronics STM32L433RCI6 datasheet (PDF)
Packaging64-UFBGA
RoHSROHS3 Compliant
SeriesSTM32L4
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

STM32L433RCI6 specifications
ParameterValue
SeriesSTM32L4
MountingSurface Mount
Oscillator typeInternal
Program memory typeFLASH
Voltage - supply (Vcc (Vdd))1.71V ~ 3.6V
Operating temperature-40°C ~ 85°C (TA)
Speed80MHz
PackageTray
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
Data convertersA/D 16x12b; D/A 2x12b
Program memory size256KB (256K x 8)

Product details

80 MHz Cortex-M4 with FPU in a 5x5 mm BGA

The 64-UFBGA package (5x5 mm) saves board area in space-constrained designs like portable medical devices, field sensors, and battery-operated IoT nodes.

Peripheral set and connectivity for mixed-signal control

With 52 I/Os, the MCU offers CANbus, multiple I²C and SPI channels, a QSPI interface for external memory expansion, SAI for audio, and a full set of UART/USART plus IrDA and SWPMI.

Industrial temperature grade and active lifecycle

ROHS3 compliant.

Frequently asked questions

Is STM32L433RCI6 obsolete?

No — the lifecycle status is Active. There is no end-of-life notice, last-time-buy, or NRND flag.

What is a direct replacement or equivalent for STM32L433RCI6?

The STM32L151CBU6A is a functionally similar ARM Cortex-M3 MCU from the STM32L1 series, but it runs at 32 MHz (versus 80 MHz) and offers fewer I/Os (37 vs 52) and a different peripheral set. It is not a pin-compatible drop-in — evaluate the full BOM impact before substituting.

How do I get current pricing and availability for STM32L433RCI6?

Submit an RFQ through this listing.