High switching speeds combined with high signal bandwidth—that’s what you’ll find in Vishay Intertechnology’s two new series of quad SPST CMOS analog switches. They should find homes in a range of switching applications, including audio, video, data, and power. The Vishay Siliconix DG451 and DG454 series of devices possess four independently selectable 44V SPST switches, each with a typical on-resistance of 4OHM and a typical flatness of 0.2OHM, which are parameters well-suited for low-distortion audio signal switching. All of the devices are pin-compatible with the Vishay Siliconix DG411, DG412, and DG413, but with significantly lower on-resistance and faster switching times. In addition, the DG454 series offers the benefit of not requiring a logic voltage pin. The advantages of this feature include no requirement for a 5V power supply to operate, no need for a PCB trace connecting the logic voltage pin, and no need for power-supply sequencing.