This part is a kind of semiconductor called KIA4558FK.

Function of this product has DUAL LOW NOISE OPERATIONAL AMPLIFIER.

Manufacturers : KEC

Image and pinout :

Some of the text within the PDF file :

SEMICONDUCTOR TECHNICAL DATA DUAL LOW NOISE OPERATIONAL AMPLIFIER KIA4558P/S/F/FK BIPOLAR LINEAR INTEGRATED CIRCUIT Internal Frequency Compensation Type. Possible to Exchange the Position of Pin Pin and Pin Wide Band Range : fT=3MHz (Typ.) Suitable Application for Active Filter and Equalizer Amplifier. for Pin Because of Pin Connection Being Symmetric. (KIA4558S Device Only). of lead frame was each other connected. (KIA4558S Only). PIN CONNECTION (TOP VIEW) KIA4558P 8 VCC A + + KIA4558F, KIA4558FK 8 VCC + KIA4558S OUT A 1 -IN A 2 +IN A 3 VEE 4 OUT A 1 -IN A 2 +IN A 3 VEE 4 A + + + 7 OUT B B - 7 OUT B VCC 1 OUT A 2 B - - +IN B 6 -IN B 7 OUT B 8 -IN A 3 +IN A 4 5 +IN B 5 +IN B MARKING KIA4558P KIA4558FK KIA 4558P Trade Name Device Name Lot No. 4558 Device Name Lot No. [ ... ]

KIA4558FK PDF Datasheet Download