FSA2275A HiFi Audio Switch with Negative Swing onsemi FSA2275A Hi-Fi Audio Switch with Negative Swing is a high-performance, Double-Pole Double-Throw (DPDT) analog switch with negative swing audio capability. The FSA2275A features an ultra-low audio RON of 0.5Ώ (typical) at 2.5V VCC. The onsemi FSA2275A operates over a VCC range of 2.5V to 5.5V, is fabricated with sub-micron CMOS technology to achieve fast switching speeds, and is designed for break-before-make operation.