AT89C1051U-12SC Similar

AT89C1051U-12SC Datasheet and AT89C1051U-12SC manual

Manufacturer : Atmel 

Packing : plastic SOIC 

Pins : 20 

Temperature : Min 0 °C | Max 70 °C

Size : 221 KB

Application : "8-bit microcontroller with 1K bytes flash, 2.7V to 6.0V power supply" 

AT89C1051U-12SC PDF Download