9.2.1.2 Detailed Design Procedure
The HD3SS3202 is a high-speed passive switch device that can behave as a mux or demux. Because this is a passive switch, signal integrity is important because the device provides no signal conditioning capability. The device can support 1 to 2 inches of board trace and a connector on either end.
To design in the HD3SS3202, the designer needs to understand the following.
- Determine the loss profile between circuits that are to be muxed or demuxed.
- Provide clean impedance and electrical length matched board traces.
- Depending upon the application, determine the best place to put the 100-nF coupling capacitor.
- Provide a control signal for the SEL and OEn pins. It may be necessary to include a 0.01µF to GND on each of these pins to help with noise immunity.
- See the application schematics on recommended decouple capacitors from VCC pins to ground