Model:ATUC256L3U-Z3UR BRAND:Microchip description:IC MCU 32BIT 256KB FLASH 64QFN pack:tape(TR),Shear zone(CT),Digi-Reel? SERIES:AVR?32 UC3 L status:in stock Core processor:AVR Core specifications:32-位 Speed:50MHz Peripherals:Undervoltage detection/reset,DMA,POR,PWM,WDT I/O number:51 Program storage capacity:256KB(256K x 8) Program memory type:Flash memory EEPROM capacity:- RAM size:32K x 8 Voltage - powered by:1.62V ~ 3.6V Data converter:A/D 8x12b Oscillator type:bosom Operating temperature:-40°C ~ 85°C(TA) Type of installation:Surface mount type Encapsulation/Shell:64-VFQFN Exposed pad Supplier device packaging:64-QFN(9x9)