This part is a kind of semiconductor called D4558.

Function of this product has monolithic integrated circuit designed for dual operational amplifier.

Manufacturers : DMS Microelectronic

Image and pinout :

Some of the text within the PDF file :

D4558 FEATURES ● ● ● ● ● ● ● No frequency Compensation Required No latch-up Large common mode and differential voltage range Parameter tracking over temperature range Gain and phase match between amplifiers Internally frequency compensated Low noise input transistors SOP8/ DIP8 PKG Out 1 2 A B + + - 8 7 - 6 Vcc IN1(-) Out2 IN2 (-) IN2 (+) IN1 (+) 3 Gnd 4 5 ORDERING INFORMATION Device 4558D 4558N Package 8 SOP 8 DIP DESCRIPTIONS The D4558 devices is a monolithic integrated circuit designed for dual operational amplifier. The high common-mode input voltage range and the absence of latch-up make these amplifiers ideal for voltage-follower applications. The devices are short-circuit protected and the internal frequency compen -sation ensures stability without external [ ... ]

D4558 PDF Datasheet Download