What the 80 MHz core and 1 MB Flash mean for the BOM
The 80 MHz Cortex-M4 with FPU handles single-precision DSP loops and control algorithms that would bog an M3 at lower clock rates. The 1 MB Flash allows a single-chip firmware image with a bootloader, application code, and a redundant OTA staging slot — no external serial Flash needed for many designs. The 128 KB SRAM supports a full FreeRTOS or Zephyr instance with several 1 KB sensor buffers and a USB packet FIFO. If your application requires more than 128 KB of RAM, you will need to budget for an external SRAM or SDRAM via the QSPI or FMC interface.
Connectivity and analog peripherals — what is on-chip
The STM32L486RGT7 integrates a CAN 2.0B controller for industrial fieldbus, a USB OTG FS for device/host/OTG roles, and a Quad-SPI interface for memory-mapped external Flash or PSRAM. The SAI (serial audio interface) connects to I²S codecs for voice or audio playback. The LCD controller drives segment-type glass displays directly, saving a separate display driver IC.
Package and footprint — 64-LQFP 10x10 mm
Housed in a 64-lead LQFP with a 10x10 mm body and 0.5 mm pitch, this package is straightforward to route on two-layer boards and is reworkable with standard hot-air tools. The 51 I/Os give enough headroom for a parallel LCD data bus, external memory address lines, and several sensor interfaces simultaneously.
The part is ROHS3 compliant.