AT89C51-20AC Similar

AT89C51-20AC Datasheet and AT89C51-20AC manual

Manufacturer : Atmel 

Packing : TQFP 

Pins : 44 

Temperature : Min 0 °C | Max 70 °C

Size : 141 KB

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

AT89C51-20AC PDF Download