QPC4270 SPST High Isolation Absorptive Switch Qorvo QPC4270 SPST (Single Pole Single Throw) High Isolation Absorptive Switch is designed for use in CATV, set-top boxes, and other high-performance communications systems. Featuring a single supply with a single CMOS/TTL compatible control line, the QPC4270 switch features low insertion loss and high isolation throughout its bandwidth, making it an optimal choice for operation from 1MHz to 3300MHz. The QPC4270 offers excellent linearity and power handling capability thanks to its Silicon on Insulator (SOI) process. This 75Ω switch does not require blocking caps on the RF ports if DC is not present on the RF ports.