This part is a kind of semiconductor called KIA4558F.

Function of this product has BIPOLAR LINEAR INTEGRATED CIRCUIT (DUAL LOW NOISE OPERATIONAL AMPLIFIER).

Manufacturers : KEC(Korea Electronics)

Image and pinout :

Some of the text within the PDF file :

SEMICONDUCTOR TECHNICAL DATA KIA4558P/S/F/FK BIPOLAR LINEAR INTEGRATED CIRCUIT DUAL LOW NOISE OPERATIONAL AMPLIFIER Internal Frequency Compensation Type. Possible to Exchange the Position of Pin for Pin Because of Pin Connection Being Symmetric. (KIA4558S Device Only). Pin and Pin of lead frame was each other connected. (KIA4558S Only). Wide Band Range : fT=3MHz (Typ.) Suitable Application for Active Filter and Equalizer Amplifier. PIN CONNECTION (TOP VIEW) KIA4558P KIA4558F, KIA4558FK OUT A 1 -IN A 2 +IN A 3 VEE 4 A -+ B +- 8 VCC 7 OUT B 6 -IN B 5 +IN B OUT A 1 -IN A 2 +IN A 3 VEE 4 A -+ B +- 8 VCC 7 OUT B 6 -IN B 5 +IN B KIA4558S AB - - + VCC 1 OUT A 2 -IN A 3 + +IN A 4 VEE 5 +IN B 6 -IN B 7 OUT B 8 VCC 9 MARKING KIA4558P KIA 4558P Trade Name Device Name Lot No. KIA45 [ ... ]

KIA4558F PDF Datasheet Download