This part is a kind of semiconductor called TC5081P.

Function of this product has CMOS Phase Comparator.

Manufacturers : ETC

Image and pinout :

Some of the text within the PDF file :

TC5081P IL08D C-MOS PHASE COMPARATOR SIDE VIEW PHASE COMPARATOR 1 A OUT 2 A IN 3 PD OUT 4 PHASE OUT VDD 5 6 NC 7 FS IN 8 FR IN GND 9 PHASE COMPARATOR TIMING CHART FS IN FR IN PD OUT HIGH IMPEDANCE PHASE OUT w w w t a .D S a e h U 4 t e .c m o w w w .D a t a e h S 4 t e U m o .c [ ... ]

TC5081P PDF Datasheet Download