80 MHz Cortex-M4 with 256 KB Flash — what this means for the BOM
The STM32L431RCT6: It belongs to the STM32L4 ultra-low-power series, designed for applications where active compute throughput and standby current both matter — think sensor-fusion nodes, battery-operated industrial controllers, and communication gateways that need to run a real-time OS and still hit years of coin-cell life.
Industrial temperature grade and where this part lives
That 85°C ceiling covers most commercial and light-industrial deployments.
Connectivity and peripheral set — what is on the bus
This MCU carries CANbus, I²C, IrDA, LINbus, MMC/SD, QSPI, SAI, SPI, SWPMI, and UART/USART interfaces. The QSPI interface is worth calling out: it lets you attach external serial Flash or PSRAM for data logging or OTA staging without chewing up GPIO for a parallel bus.
The ROHS3 compliance is confirmed on the product marking, so it passes EU and global restricted-substance requirements without a waiver.
Package and mounting — 64-LQFP footprint details
A formal RFQ is the fastest way to lock a price break and delivery window for your BOM line.