The STM32L4Q5ZGT6P is an STMicroelectronics 32-bit MCU built around an ARM Cortex-M4 core clocked at 120 MHz, with 1 MB of Flash and 320 KB of SRAM. It is part of the STM32L4 series, ST's ultra-low-power line that still delivers DSP and FPU performance for signal processing. The 144-LQFP package gives you 115 I/O lines, which is enough to drive a parallel LCD, a memory bus, or a dense sensor array without needing a port expander.
Industrial temperature range and wide supply — field-fit check
If your design lives in a hot engine bay or a cold storage warehouse, the temperature grade covers it without needing a mil-spec uprate.
On-chip peripherals that reduce BOM
The integrated LCD driver saves an external display controller for segmented glass panels. Connectivity includes CANbus for industrial networks, USB OTG for host/device mode, and SAI for audio codec interfaces — all without extra transceivers on the basic links.
Package and rework — no special gear needed
The 144-LQFP with a 20x20 mm body is a standard QFP footprint. You can hand-solder it with a fine-tip iron or reflow it in a conventional oven. No BGA reball, no hot-air station required. If you are swapping one in the field, the pin pitch is wide enough to inspect with a loupe, and the orientation is marked by pin 1 chamfer.
The product status is listed as active. That means ST is still manufacturing it, supporting it with errata and app notes, and accepting new orders. No last-time-buy window to chase, no end-of-life date to watch. For a production BOM, this is the green-light status you want.