What the STM32L471QEI7 is and where it fits
The STM32L471QEI7 is a 32-bit ARM Cortex-M4 microcontroller from STMicroelectronics' STM32L4 series, clocked at 80 MHz with 512 KB of Flash and 128K x 8 of RAM. It packs a rich peripheral set including CANbus, QSPI, multiple I²C and SPI interfaces, and a 19-channel 12-bit ADC, all in a 132-UFBGA package. This part targets industrial control, motor drives, and outdoor telecom equipment where the -40°C to 105°C operating range and low-power architecture matter.
80 MHz Cortex-M4 — timing headroom for control loops
The 80 MHz core speed with single-cycle multiply and hardware FPU provides throughput for real-time control loops. The 512 KB Flash is sized for moderate application code plus a bootloader.
Lifecycle and sourcing reality
The STM32L471QEI7 is marked end-of-life (EOL) in the supply chain. For a BOM line that needs this exact code, the only channel is surplus or independent distribution — sourced and quoted to order against an RFQ.
Connectivity — CAN and QSPI confirmed
Yes, this part supports both CANbus and QSPI. The CAN interface handles industrial fieldbus and automotive-style networks; QSPI gives you a fast serial memory bus for external Flash or RAM expansion without tying up the main data bus. The 109 GPIOs leave plenty of headroom for parallel LCDs or sensor arrays.