SCEA147 September   2024 TXB0104 , TXB0302 , TXB0304

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2TXB-Type Architecture Differences
    1. 2.1 TXB0104 and TXB0304 Comparison
    2. 2.2 Recommended Device Selection
  6. 3Common Design Challenges
    1. 3.1 Distributed Load (Transmission Line Effect)
      1. 3.1.1 Cable Length Impact - Bench Findings
    2. 3.2 Impedance Matching
      1. 3.2.1 Bench Setup and Results
    3. 3.3 Lumped Load
  7. 4Case Study
  8. 5Summary
  9. 6References

2.2 Recommended Device Selection

While both TXB0104 and TXB0304 can be used for push-pull auto-bidirectional applications, the following are specific cases where one can be recommended over the other:

The TXB0304 is better designed for applications with the following:

  • Symmetrical power supplies (VCCA ≤ or ≥ VCCB)
  • I/Os operating between 0.9V and 3.6V
  • Data rates higher than 100Mbps at 15pF output load.
  • Short trace lengths/ minimum capacitive loading with external impedance matching in the system

The TXB0104 is recommended for applications with the following:

  • I/Os operating between 1.2V and 5.5V
  • Data rates up to 100Mbps
  • Short trace lengths/ minimum capacitive loading