STM32L4R5QGI6STR — 120 MHz Cortex-M4 with 1 MB Flash
The ST STM32L4R5QGI6STR is a 32-bit ARM Cortex-M4 microcontroller from the STM32L4 ultra-low-power series, clocked at 120 MHz. It carries 1 MB of Flash and 640 KB of RAM on-chip, with 110 I/O lines and a rich peripheral set including CANbus, USB OTG, multiple SPI/I²C/UART interfaces, and a 16-channel 12-bit ADC plus a 2-channel 12-bit DAC. The part is supplied in a 132-ball UFBGA package (7x7 mm) and rated for the -40 to 85 °C industrial temperature range, making it suited for factory automation, sensor hubs, and IoT edge nodes that need both processing headroom and low-power operation.
120 MHz and memory budget — what they mean for the design
Package and layout note
The 132-UFBGA (7x7 mm) uses a fine-pitch BGA. A multi-layer PCB with via-in-pad or microvia capability is required, plus X-ray inspection after reflow.