80 MHz Cortex-M4 with 1 MB Flash — memory headroom for complex firmware
The STM32L496QGI3: The 1 MB Flash and 320 KB SRAM support large application images without external memory.
132-ball UFBGA — layout and thermal considerations
Housed in a 132-UFBGA package measuring 7x7 mm, this MCU packs 110 I/O into a compact footprint. Decoupling strategy: place a 100 nF ceramic cap within 2 mm of each VDD/VDDIO ball pair, plus a 4.7 µF to 10 µF bulk cap per supply domain.
Connectivity and peripheral set — what the 110 I/O buy you
The STM32L496QGI3 carries a full industrial connectivity suite: CANbus for fieldbus, USB OTG for dual-role device/host, QSPI for high-speed serial NOR Flash or PSRAM, and SAI for I²S audio codec interfaces. The EBI/EMI bus can gluelessly connect to external parallel SRAM, NOR Flash, or LCD controllers. With 110 I/O, you can bring out multiple UARTs, SPI, and I²C channels simultaneously without pin-mux conflicts — useful for a sensor hub or a gateway aggregating several serial protocols. The 12-bit resolution is adequate for most sensor readouts and control loops; if higher precision is needed, an external ADC would be required. Brown-out detect and reset are built in, so external supervisor ICs can be omitted in cost-sensitive designs.