NXP Semiconductors P89LPC9221FDH Data Bus Width: 8 Bit Device Core: 80C51 Family Name: 89LP Interface Type: I2C/UART Maximum Speed: 18 MHz Number Of Programmable I/os: 18 Number Of Timers: 2 Operating Supply Voltage: 2.5|3.3 V Operating Temperature: -40 to 85 ?‚?°C Package: 20TSSOP Program Memory Size: 8 KB Program Memory Type: Flash Ram Size: 256 Byte