SCDA049 April   2024 TMUX4827

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2The Three Types of Beyond the Supply Operation
    1. 2.1 Negative Beyond the Supply
    2. 2.2 Positive Beyond the Supply
    3. 2.3 Negative and Positive Beyond the Supply
  6. 3Summary
  7. 4References

3 Summary

The Beyond the Supply feature comes in three different types. Negative, positive, or Negative and Positive signal operations. The feature allows multiplexers to pass a signal above or below the supply range, or both. This feature is mainly used in audio application due to the systems requirements of passing audio signals exceeding the power supply of that said system. Multiplexers with such a feature also usually have powered off protection such as the TMUX1574 and the TMUX4827. Additionally, having low internal resistance is crucial to maintain signal integrity, which the TS5A22364 and the TMXU4827 have.

Table 3-1 Recommended Devices for Beyond the Supply
DeviceChannel and ConfigurationOperating Voltage and SupplyOn ResistanceNegative Beyond the SupplyPositive Beyond the SupplyNegative and Positive Beyond the Supply
TMUX48272:1 2-channel

1.8Vto 5.5V

±12V I/O

0.12Ω✓
TMUX28892:1 2-channel

1.8Vto 5.5V

±5.5V I/O

0.16Ω✓
TMUX15742:1 4-channel1.5Vto 5.5V VDD x 2 I/O2Ω✓
TS5A223642:1 2-channel2.3V to 5.5V VDD - 5.5V I/O0.52Ω✓