Model:AT90USB646-MUR BRAND:Microchip description:IC MCU 8BIT 64KB FLASH 64QFN pack:tape(TR),Shear zone(CT),Digi-Reel? SERIES:AVR? 90USB status:in stock Core processor:AVR Core specifications:8-bit Speed:16MHz Peripherals:Undervoltage detection/reset,POR,PWM,WDT I/O number:48 Program storage capacity:64KB(64K x 8) Program memory type:Flash memory EEPROM capacity:2K x 8 RAM size:4K x 8 Voltage - powered by:2.7V ~ 5.5V Data converter:A/D 8x10b 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)