Model:AT89C51-24AI BRAND:Microchip description:IC MCU 8BIT 4KB FLASH 44TQFP pack:tray SERIES:89C status:Discontinued Core processor:8051 Core specifications:8-bit Speed:24MHz Peripherals:- I/O number:32 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:-40°C ~ 85°C Type of installation:Surface mount type Encapsulation/Shell:44-TQFP Supplier device packaging:44-TQFP(10x10)