SCDA044 January   2023 TMUX1308

 

  1.   Abstract
  2.   Trademarks
  3. 1Simplifying the Sourcing Strategy
    1. 1.1 Cost Savings and Increased Flexibility
    2. 1.2 Placement and Routing Tips
    3. 1.3 Example Secondary Footprints
    4. 1.4 Using Multiple Devices to Create Desired Multiplexer Configuration
  4. 2Summary
  5. 3References

Abstract

When developing a new PCB, designers are increasingly required to choose signal switches and multiplexers that offer second sourcing options from multiple semiconductor manufacturers. This restriction can limit the ability of the designer to select parts that utilize the latest, smallest, and most cost-effective packages on the market. A solution to this roadblock is to place a secondary footprint of the smaller package inside of the footprint of the larger package. Several of the benefits gained by this design are discussed in this application note.

GUID-4F5173D8-9E5A-42C1-9A90-5DCF383254D1-low.png Figure 1-1 Example of a SOT-23 (DCN) Footprint Within a SOIC (D) Footprint