The LM4558D is a general-purpose amplifier, manufactured with the SOIC-8_150mil RoHS technology by HTC Korea. It is an analog-based, monolithic signal-buffer integrated circuit designed to provide clean audio amplification in both electro-acoustic and control systems. It is an 8-pin integrated circuit that is capable of driving both small- and medium-level loads and operates with a minimum quiescent current drain of only 2 mA. The LM4558D also features a wide gain range of 8V/V, high dynamic output range of 3.8Vrms, and wide common-mode and differential input voltage ranges. It is capable of providing excellent noise immunity and low-noise-floor performance, making it suitable for both industrial and consumer applications.