80 MHz Cortex-M4 with 512 KB Flash — what it means for the BOM
The STM32L471QEI7TR is a 32-bit ARM Cortex-M4 MCU from ST's STM32L4 ultra-low-power series, clocked at 80 MHz with 512 KB of Flash program memory and 128 KB of SRAM. It packs 109 I/O, a rich peripheral set including CANbus, multiple I²C/SPI/UART interfaces, QSPI, and a 19-channel 12-bit ADC plus dual 12-bit DAC. The part is specified over the -40°C to 105°C industrial temperature range and runs from a 1.71 V to 3.6 V supply. This is the tape-and-reel variant (132-UFBGA 7x7 mm) aimed at volume production.
Industrial temperature and package — deployment context
The -40°C to 105°C rating suits this MCU for motor drives, outdoor telecom gear, factory automation controllers, and under-hood automotive modules (though not AEC-Q100 qualified per the listing).