Active lifecycle, 1 MB Flash, 80 MHz Cortex-M4 — what this STM32L4 part brings
The 1 MB Flash gives firmware teams room for a full RTOS, communications stack, and application logic without external memory. The 128 KB SRAM handles moderate data buffering — enough for a CANopen stack with several PDOs or a small GUI frame buffer over QSPI. The 82 GPIOs in the 100-LQFP package provide ample headroom for mixed-signal and display applications.
Supply voltage and temperature — where this part fits the BOM
The 1.71 V minimum supply lets this MCU run directly from two alkaline cells or a single Li-ion through most of its discharge curve, eliminating a boost regulator in low-power designs. The 3.6 V maximum covers 3.3 V rails with margin for ripple. For extended automotive or downhole use, check the STM32L4+ or automotive-grade siblings.
Package and mounting — 100-LQFP with 82 I/O
The 82 I/O count provides enough pins for a parallel LCD, external SRAM/Flash via EBI, and a sensor array without multiplexing. Surface-mount assembly with MSL 3 handling — store the reels dry and bake before reflow if the moisture barrier bag has been open past the floor-life window.
This is a safe line-item for a multi-year production BOM. The base product number STM32L471 spans several density and package variants; the VGT6 suffix specifically denotes the 100-pin LQFP with 1 MB Flash. If your board layout allows a 144-pin package, the STM32L476 family shares the same core and peripheral set with additional I/O.