Found 3 alternatives for XUF208-256-TQ64-C10 by XMOS. Embedded Microcontrollers — 64-TQFP Exposed Pad.
IC MCU 32BIT 32KB FLASH 64TQFP
IC MCU 32BIT 16KB FLASH 64TQFP
IC MCU 32BIT ROMLESS 64TQFP