This part is a kind of semiconductor called AD574.

Function of this product has Complete 12-Bit A/D Converter.

Manufacturers : Analog Devices

Image and pinout :

Some of the text within the PDF file :

a FEATURES Complete 12-Bit A/D Converter with Reference and Clock 8- and 16-Bit Microprocessor Bus Interface Guaranteed Linearity Over Temperature 0 ؇ C to +70؇ C – AD574AJ, K, L –55؇ C to +125؇ C – AD574AS, T, U No Missing Codes Over Temperature 35 ␮ s Maximum Conversion Time Buried Zener Reference for Long-Term Stability and Low Gain T.C. 10 ppm/ ؇C max AD574AL 12.5 ppm/؇ C max AD574AU Ceramic DIP, Plastic DIP or PLCC Package Available in Higher Speed, Pinout-Compatible Versions (15 ␮s AD674B, 80 ␮s AD774B; 10 ␮s (with SHA) AD1674) Available in Versions Compliant with MIL-STD-883 and JAN QPL +5V SUPPLY VLOGIC DATA MODE SELECT 12/8 CHIP SELECT CS BYTE ADDRESS/ SHORT CYCLE AO READ/CONVERT R/C CHIP ENABLE CE +12/+15V SUPPLY VCC +10V REFERENCE REF OUT ANALOG COMMON AC REF [ ... ]

AD574 PDF Datasheet Download