This part is a kind of semiconductor called ATM43D-446778.

Function of this product has 20-Pin HSOP.

Manufacturers : ETC

Image and pinout :

Some of the text within the PDF file :

1 2 3 4 5 6 7 8 9 10 GND OUT 0V IN 11 12 13 GND OUT IN 14 15 0V 16 17 IN 0V OUT GND IN OUT GND 18 19 20 [ ... ]

ATM43D-446778 PDF Datasheet Download