193964C8051F310-GQRC8051F310-GQRSilicon Laboratories 80C51 derivate series C8051F .
8-Bit ISP Flash microcontrollers in a High-Speed pipelined instruction architecture
suitable for 80C51 products
with up to five 16-Bit timers
frequency: 25 to 50MHz
supply voltage: 2,7 to 3,6V
operating temperature: -40 to +85°C