AT89C51-20PI Similar

AT89C51-20PI Datasheet and AT89C51-20PI manual

Manufacturer : Atmel 

Packing : PDIP 

Pins : 40 

Temperature : Min -40 °C | Max 85 °C

Size : 141 KB

Application : 8-bit microcontroller with 4K bytes flash, 5V, 20MHz 

AT89C51-20PI PDF Download