This part is a kind of semiconductor called GM5621.
Function of this product has (GM5621 / GM5626) Dual Input LCD Controller.
Manufacturers : Genesis Microchip
Image and pinout :

Some of the text within the PDF file :
PRELIMINARY PRODUCT BRIEF gm5621/gm5626/gm2621/gm2626 Dual Input LCD Controller for Entry Level Applications A P P L I C AT I O N Mainstream analog and dualDESCRIPTION Genesis gm5621 and gm5626 are all-in-one dual input LCD monitor controllers supporting resolutions up to SXGA, available in a very low pin count package. gm5621/5626 leverage Genesis patented advanced image-processing technology, as well as a proven integrated ADC/PLL and an Ultra-Reliable DVI® compliant digital receiver to deliver a high-quality solution for mainstream analog and dual input monitors. gm5621/5626 offer new Instant Auto™ technology, which provides fast and accurate image alignment for both static and moving images of the analog input signal. gm5621 includes an on-chip, industry sta [ ... ]
GM5621 PDF Datasheet Download
