The MAX4647/MAX4648 are dual-supply single-pole/single-throw (SPST) switches. On-resistance is 25 max and flat (2 max) over the specified signal range. Each switch can handle Rail-to-Rail analog signals. Off-leakage current is only 1nA max at +25C. They conduct analog or digital signals equally well in either direction. The primary application areas are in the switching and routing of signals in telecommunications and test equipment.