120 MHz Cortex-M4 with 1 MB Flash — where this sits in the STM32L4 lineup
The STM32L4P5AGI6P is STMicroelectronics' high-density member of the STM32L4 series, built around an ARM Cortex-M4 core with FPU clocked at 120 MHz. The 169-UFBGA package (7x7 mm) packs 140 I/O into a footprint that demands a four-layer PCB minimum and careful via fan-out under the BGA. This is not a prototype-friendly hand-solder package; expect to route it on a production board with microvias or at least a 0.2 mm via-in-pad strategy.
Peripheral set and connectivity — what the 140 I/O actually buys
The peripheral list includes CANbus, USB OTG, multiple SPI and I²C interfaces, SAI for audio, and an EBI/EMI bus that can gluelessly connect external SRAM or a parallel LCD controller. Brown-out detect, POR, and a programmable watchdog are on-chip, which simplifies the power-supervision BOM for industrial controllers that need to survive a glitch without corrupting Flash. The LCD peripheral drives a segment display directly — a feature that saves a dedicated driver IC in metering or point-of-sale designs.
Lifecycle and sourcing posture
STMicroelectronics lists the STM32L4P5AGI6P with an Active product status.