The DG447, DG448 are dual supply single-pole/single-throw (SPST) switches. On resistance is 25 W maximum and flatness is 2.2 W max over the specified analog signal range. These analog switches were designed to provide high speed, low error switching of precision analog signals. The primary application areas are in the routing and switching in telecommunications and test equipment. Combining low power, low leakages, low on-resistance and small physical size, the DG477, DG448 are also ideally suited for portable and battery powered industrial and military equipment. The DG477 has one normally closed switch, while the DG448 switch is normally open. They operate either from a single + 7 V to 36 V supply or from dual ± 4.5 V to ± 20 V supplies. They are offered in the very popular, small TSOP6 package.