The enable (EN) pin is an active-high logic pin that controls the connection between the source (SxA, SxB) and drain (Dx) pins of the device. When the enable pin is pulled low, all switches are turned off. When the enable is pulled high, the select pin controls the signal path selection. The select pin (SEL) controls the state of all four channels of the TMUX1575 and determines which source pin is connected to the drain pins. When the select pin is pulled low, the SxA pin conducts to the corresponding Dx pins. When the select pin is pulled high, the SxB pin conducts to the corresponding Dx pins. The TMUX1575 logic pins have internal weak pull-down resistors (6 MΩ) to GND so that it powers-on in a known state.

The TMUX1575 can be operated without any external components except for the supply decoupling capacitors. Unused logic control pins should be tied to GND or V_DD in order to ensure the device does not consume additional current as highlighted in Implications of Slow or Floating CMOS Inputs. Unused signal path inputs (SxA, SxB, or Dx) should be connected to GND.