The TMUX48XXDSGDDF-EVM has seven 3-pin headers to control the power supply connection, the control inputs, the sources and drains. The following is a description of each header.

1. Supply Header J1

   Header J1 connects the VDD pin to either the external power or to ground via a jumper. If Header J1 is not connected, then the devices supply is left floating. Figure 2-1 shows header J1.

   1. To connect to the external supply, short the J1-2 location on the header to J1-3. The V_EXT terminal is now supplying the device power.
   2. To connect to ground, short the J1-2 location on the header to J1-1. The device supply pin is now grounded.
   3. To leave the device supply pin floating, leave J1-2 unconnected and floating.
2. Control Header J6

   Header J6 connects the SEL1 pin to either VDD or ground by a jumper. If Header J6 is not connected, then the devices SEL1 pin is left floating.

   1. To connect to VDD, short the J6-2 location on the header to J6-3. VDD is now connected to the devices SEL1 pin.
   2. To connect to ground, GND, short the J6-2 location on the header to J6-1. The device SEL1 pin is now grounded.
   3. Leaving J6-2 unconnected leaves the SEL1 pin floating. Doing this is not recommended as the device is in an unknown state.
3. Control Header J7

   Header J7 connects the SEL2 pin to either VDD or ground via a jumper. If Header J7 is not connected, then the devices SEL2 pin is left floating.

   1. To connect to VDD, short the J7-2 location on the header to J7-3. VDD is now connected to the devices SEL2 pin.
   2. To connect to ground, GND, short the J7-2 location on the header to J7-1. The device SEL2 pin is now grounded.
   3. Leaving J7-2 unconnected leaves the SEL2 pin floating. Doing this is not recommended as the device is in an unknown state.
4. Drain Header J2

   Header J2 connects the D1 pin to either VDD or ground by a jumper. If Header J2 is not connected, then the devices D1 pin is left floating.

   1. To connect to VDD, short the J2-2 location on the header to J2-1. VDD is now connected to the devices D1 pin.
   2. To connect to ground, GND, short the J2-2 location on the header to J2-3. The device D1 pin is now grounded.
   3. Leaving J2-2 unconnected leaves the D1 pin floating.
5. Drain Header J3

   Header J3 connects the D2 pin to either VDD or ground via a jumper. If Header J3 is not connected, then the devices D2 pin is left floating.

   1. To connect to VDD, short the J3-2 location on the header to J3-1. VDD is now connected to the devices D2 pin.
   2. To connect to ground, GND, short the J3-2 location on the header to J3-3. The device D2 pin is now grounded.
   3. Leaving J3-2 unconnected leaves the D2 pin floating.
6. Source Header J4

   Header J4 connects the S1 pin to either VDD or ground by a jumper. If Header J4 is not connected, then the devices S1 pin is left floating.

   1. To connect to VDD, short the J4-2 location on the header to J4-3. VDD is now connected to the devices S1 pin.
   2. To connect to ground, GND, short the J4-2 location on the header to J4-1. The device S1 pin is now grounded.
   3. Leaving J4-2 unconnected leaves the S1 pin floating.
7. Source Header J5

   Header J5 connects the S2 pin to either VDD or ground by a jumper. If Header J5 is not connected, then the devices S2 pin is left floating.

   1. To connect to VDD, short the J5-2 location on the header to J5-3. VDD is now connected to the devices S2 pin.
   2. To connect to ground, GND, short the J5-2 location on the header to J5-1. The device S2 pin is now grounded.
   3. Leaving J5-2 unconnected leaves the S2 pin floating.

Figure 2-1 Header J1 : J1-1(GND), J1-2(Connection to device VDD), J1-3 (V_EXT)

Figure 2-2 Header J6 : J6-1(GND), J6-2(Connection to device SEL1), J6-3 (VDD)

Figure 2-3 Header J7 : J7-1(GND), J7-2(Connection to device SEL2), J7-3 (VDD)

Figure 2-4 Header J2 : J2-1(VDD), J2-2(Connection to device D1), J2-3 (GND)

Figure 2-5 Header J3 : J3-1(VDD), J3-2(Connection to device D2), J3-3 (GND)

Figure 2-6 Header J4 : J4-1(GND), J4-2(Connection to device S1), J4-3 (VDD)

Figure 2-7 Header J5 : J5-1(GND), J5-2(Connection to device S2), J5-3 (VDD)

The logic headers J6(SEL1) and J7(SEL2) can be used to control both the TMUX4821 and TMUX4819. The TMUX4819 has an EN pin which can be controlled by SEL2 and the SEL pin to be controlled by SEL1.

Figure 2-8 TMUX48XXDSGDDF-EVM TMUX4821 Truth Table

Figure 2-9 TMUX48XXDSGDDF-EVM TMUX4819 Truth Table