STMicroelectronics 64-LQFP ST72F321AR9TCTXS

The part number ST72F321AR9TCTXS refers to a specific variant of an 8-bit microcontroller from STMicroelectronics within the ST7 series. It features 60KB of FLASH/ROM memory, operates at a frequency of up to 8MHz, and comes in a 64-pin LQFP package. The 'AR' suffix likely denotes different memory size or package configuration compared to other models like the BR9T6. However, please note that 'CTXS' does not match the typical STMICROELECTRONICS part numbering scheme for this MCU line, as seen in documented versions. Verify with official sources to confirm the exact specifications and availability of this particular part number.