Peripheral set and connectivity
The STM32L431KCU6TR: On-chip peripherals include a 12-bit ADC with 10 channels, a 12-bit DAC with 2 channels, CANbus, I²C, SPI, UART/USART, QSPI, and SAI — enough serial interface variety to talk to sensors, displays, and motor drivers without external bridge chips. The 26 GPIOs in this package variant are the limiting factor: if your design needs more than 26 I/O, step up to the 48-pin or 64-pin STM32L431 siblings.
Lifecycle and sourcing reality
The lifecycle stage for this order code is flagged as end-of-life hot. That means the manufacturer has issued or is about to issue a last-time-buy notice. If you are qualifying a new design, consider the STM32L431KCU6TR only for a short production run or a BOM that already has a transition plan. For existing builds, secure your final order quantities now. We source this part to order against an RFQ through independent distribution — availability and current pricing are confirmed at quote time.