Model:AT89C4051-12SC BRAND:Microchip description:IC MCU 8BIT 4KB FLASH 20SOIC pack:Pipe fittings SERIES:89C status:Discontinued Core processor:8051 Core specifications:8-bit Speed:12MHz Peripherals:Undervoltage detection/reset,LED,POR I/O number:15 Program storage capacity:4KB(4K x 8) Program memory type:Flash memory EEPROM capacity:- RAM size:128 x 8 Voltage - powered by:4V ~ 6V Data converter:- Oscillator type:bosom Operating temperature:0°C ~ 70°C(TA) Type of installation:Surface mount type Encapsulation/Shell:20-SOIC(0.295",7.50mm width) Supplier device packaging:20-SOIC