STM32U585RIT6

STM32U585RIT6 is a STMicroelectronics ultra-low-power Arm Cortex-M33 microcontroller with TrustZone and FPU in LQFP-64 (10 x 10 mm) — for battery-powered IoT, metering and secure embedded designs that cannot take the 169-ball UFBGA of the STM32U585AII6. It keeps the same 2 Mbytes of dual-bank Flash and 786 Kbytes of SRAM (722 Kbytes with ECC on) at up to 160 MHz, over -40°C to +85°C on a 1.71 V to 3.6 V supply, and ST lists it as Active in tray packing. Selection advice: choose the RIT6 code for a lower-pin-count, leaded footprint that is easier to assemble and inspect; choose the AII6 UFBGA code when the design needs the full I/O count of the 169-ball package, and do not mix Q-suffixed SMPS order codes with non-SMPS codes without the matching power-supply BOM, as ST sells them as separate orderable variants.