80 MHz Cortex-M4 with 1 MB Flash — the processing headroom
The 115 I/O pins and the 144-LQFP package (20x20 mm body) make it a natural fit for systems that parallel a lot of peripherals — think motor-drive control panels, multi-sensor data loggers, or human-machine interfaces with segment LCD drive (the LCD peripheral is on the list). Supply range from 1.71V to 3.6V covers single-cell Li-ion or a regulated 3.3V rail with headroom for brownout.
Connectivity and analog — what the peripheral set covers
The STM32L4A6ZGT6 integrates CANbus and USB OTG, which are the two interfaces that often decide whether a design needs a second MCU or a separate transceiver. The analog front end includes a 24-channel 12-bit ADC and a 2-channel 12-bit DAC — enough resolution for current-sense feedback loops or sensor voltage acquisition without an external converter. Brown-out detect and DMA are built in, so the core can service peripherals without stalling on polling.
That means no last-time-buy deadline on the horizon, no forced redesign to a different pinout. The base product number is STM32L4A6, which shares the same package and peripheral map across the density options in the STM32L4A6 family.
144-LQFP — rework-friendly footprint
The 144-LQFP (20x20 mm) is a standard quad flat pack with 0.5 mm pitch. No BGA rework station needed, no X-ray inspection for hidden joints. The exposed pad is on the bottom of the package — a via-stitched thermal land on the PCB is recommended if the design draws sustained current through multiple peripherals. The tray shipping medium is typical for this package size; reeling is available for volume assembly.