The PI5A101 is a quad SPST (single-pole, single-throw) NC (normally closed) function. When on, each switch conducts current equally well in either direction. When off, they block voltages up to the powersupply rails. The PI5A101 is fully specified with +5V and +3.3V supplies. With +5V the RON is 8 ohms typical, making it ideal for replacing mechanical relays in data communications, test equipment, and instrumentation applications. Matching between channels is better than 2 ohms. RON flatness is better than 4 ohms over the specified range.