This part is a kind of semiconductor called XC3020A.

Function of this product has Field Programmable Gate Arrays.

Manufacturers : Xilinx

Image and pinout :

Some of the text within the PDF file :

Product Obsolete or Under Obsolescence R November 9, 1998 (Version 3.1) 0 XC3000 Series Field Programmable Gate Arrays (XC3000A/L, XC3100A/L) 0 7* Product Description Features • Complete line of four related Field Programmable Gate Array product families - XC3000A, XC3000L, XC3100A, XC3100L • Ideal for a wide range of custom VLSI design tasks - Replaces TTL, MSI, and other PLD logic - Integrates complete sub-systems into a single package - Avoids the NRE, time delay, and risk of conventional masked gate arrays • High-performance CMOS static memory technology - Guaranteed toggle rates of 70 to 370 MHz, logic delays from 7 to 1.5 ns - System clock speeds over 85 MHz - Low quiescent and active power consumption • Flexible FPGA architecture - Compatible arrays ranging from 1,000 to [ ... ]

XC3020A PDF Datasheet Download