This part is a kind of semiconductor called DAC1210LCJ.
Function of this product has DAC1231/DAC1232 12-Bit/ mP Compatible/Double-Buffered D to A Converters.
Manufacturers : National Semiconductor
Image and pinout :

Some of the text within the PDF file :
MICRO-DAC DAC1208 DAC1209 DAC1210 DAC1230 DAC1231 DAC1232 12-Bit mP Compatible Double-Buffered D to A Converters February 1995 MICRO-DAC TM DAC1208 DAC1209 DAC1210 DAC1230 DAC1231 DAC1232 12-Bit mP Compatible Double-Buffered D to A Converters General Description The DAC1208 and the DAC1230 series are 12-bit multiplying D to A converters designed to interface directly with a wide variety of microprocessors (8080 8048 8085 Z-80 etc ) Double buffering input registers and associated control lines allow these DACs to appear as a two-byte ‘‘stack’’ in the system’s memory or I O space with no additional interfacing logic required The DAC1208 series provides all 12 input lines to allow single buffering for maximum throughput when used with 16-bit processors These input lines can also b [ ... ]
DAC1210LCJ PDF Datasheet Download
