TMUX1248 2:1 SPDT General Purpose Switch Texas Instruments TMUX1248 2:1 SPDT General Purpose Switch supports bidirectional analog and digital signals on the source (Sx) and drain (D) pins ranging from GND to VDD. The select pin (SEL) state controls which of the two source pins are connected to the drain pin. The TI TMUX1248 provides a low supply current of 7nA, enabling the device to be used in a host of handheld or low-power applications.