The HMC194MS8 is a low-cost SPDT switch in an 8-lead MSOP package for use in applications which require high isolation between two RF paths. The device can control signals from DC to 3 GHz and is especially suited for PDC, DCS, PCS, and 2.4 GHz ISM frequency bands. The design has been optimized to provide extremely high isolation with minimal insertion loss in medium and low power applications. On chip circuitry allows positive voltage control operation at very low DC currents with control inputs compatible with CMOS and most TTL logic families. RF 1 or RF2 is a reflective open when "OFF". Applications include local oscillator multiplexing in cellular/PCS basestation applications which require high isolation.