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Frequent questions

  • [FAQ]: What Multiplexers or Switches can I use for RS-232, RS-422, and RS-485 Applications?

    When trying to find a multiplexer as a solution for RS-232, RS-422, and RS-485 applications. It is important to understand what parameters to look for when trying to find the right mux. Each protocol has its own requirements, but in order to make it simple…

  • [FAQ] What Multiplexers can I use for Hot-Swapping and Hot-Insertion Applications?

    When looking for a multiplexer to be implemented for hot-insertion (also known as hot-swapping) applications. It is important to make sure it has Ioff Circuitry and the Partial Power Down Mode feature. We also recommend to pick a multiplexer with a continuous…

  • [FAQ] TMUXS7614D: What is a SPI Controlled MUX?

    Part Number: TMUXS7614D Tool/software: Most multiplexers use GPIO signals to switch between input and output connections. Another method of controlling a multiplexer is by using SPI. In place of GPIO control pins, a device controlled with SPI will…

  • [FAQ] What is shoot-through current in an analog multiplexer and how to avoid it

    Part Number: TMUX1574 Tool/software: Shoot-through current occurs when CMOS inputs are somewhere between their High and Low voltages, effectively turning on both MOSFETs in the CMOS structure. In many devices, including analog multiplexers, this creates…

  • [FAQ] TMUX1308-Q1: Fail-safe operation

    Part Number: TMUX1308-Q1 Tool/software: Hi Experts, ' Is there any guidelines to follow regarding the input when the TMUX is not powered. Can i apply input voltage when the supply is not available. Thank you for the guidance. Regards, S…

  • [FAQ] Which Device Do I Choose If I Need Powered-Off Protection?

    Part Number: TMUX1575 Other Parts Discussed in Thread: SN74CBT3245A , SN74CBT3245C , SN74CBT3861 , SN74CBTLV3861 , SN74CBT3257C , TMUX1574 , , SN74LV4066A , TMUX1511 , TS5A23157 , TMUX1072 System isolation is critical for power sequencing, managing…

  • [FAQ] TMUX1574: [FAQ] What S-Parameter Models and how do I use them?

    Part Number: TMUX1574 S-parameter (or scatter parameter) models are AC based models used to understand small scale AC performance of devices. They are created by measuring the scattering (reflections and transmissions) of a device based on some stimulus…

  • [FAQ] What is Latch up in CMOS Devices and How can Latch up Immune Multiplexers Improve System Reliability?

    What is Latch up? Latch-Up is a condition where a low impedance path is created between a supply pin and ground. This condition is caused by a trigger (current injection or overvoltage), but once activated, the low impedance path remains even after…

  • [FAQ] What Analog Switch / Multiplexer Should I Use for Beyond the Supply Applications?

    One of the features our devices have is beyond the supply. It allows them to pass a voltage signal below ground or above VDD. There are three different types of beyond the supply operations: Negative signal operation Positive signal operation…

  • [FAQ] What are the differences between PCA and TCA I2C switches?

    When choosing an I2C switch , you might be curious as to why a PCA family switch has a TCA counterpart and vice versa. The differences are the following: 1) TCA devices typically have lower supply voltage thresholds 2) TCA devices have corrected…

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