The RS8559XQ is a precision operational amplifier (OpAmp) IC manufactured by RUNIC. It is a low-noise, low-power operational amplifier using an advanced CMOS process, and is offered in a TSSOP-14 package. It operates over a wide supply voltage range of 2.7V to 5.5V, and has a very fast slew rate of 2.5 V/us. The IC comes with four independent OpAmps, and is fully RoHS compliant. It is ideal for automatic test equipment, instrumentation, medical and power supplies, amongst other applications.