Found 4 alternatives for XU208-256-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
IC MCU 32BIT 1MB FLASH 64TQFP