SCEA135 june   2023 TXB0101 , TXB0102 , TXB0104 , TXB0104-Q1 , TXB0106 , TXB0106-Q1 , TXB0108 , TXB0302 , TXB0304 , TXS0101 , TXS0101-Q1 , TXS0102 , TXS0102-Q1 , TXS0104E , TXS0104E-Q1 , TXS0108E , TXS0108E-Q1

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2The One-shot's Designed Duration
    1. 2.1 Design Considerations
    2. 2.2 Recommended Parts
  6. 3Design Considerations for Slow Rise and Fall Times
    1. 3.1 Design Considerations
    2. 3.2 Recommended Parts
  7. 4Consider the Impact of External RC Components on Rise and Fall Times
    1. 4.1 Design Considerations
    2. 4.2 Recommended Parts
  8. 5Consider the Lumped Capacitance
    1. 5.1 Design Considerations
    2. 5.2 Recommended Parts
  9. 6Consider the Effects of Temperature on the Output Impedance
    1.     Design Considerations
  10. 7Summary
  11. 8References

2.1 Design Considerations

  • Figure 6-4 shows the one-shot expiring at about 200 pF.
  • Do not expire or time-out the one-shot prior to reaching the designed duration.
  • Consider short enough traces for round-trip delay reflections within the one-shot duration of 10-30 ns.
  • Avoid excessive loading (similar to the datasheets) as the longer the trace length, the more the lumped capacitive loading
  • Need additional assistance? Ask our engineers a question on the TI E2E™ Logic Support Forum