How to Perform DS3904 Digital DIP Switch Resistor into High-Impedance Mode Circuit

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The advantages of using a digital DIP switch instead of a conventional mechanical one is that the digital offers small size DS3904 digital dip switch circuit diagram and better security. The DS3904 is one example that contain three digitally controlled nonvolatile (NV) variable resistors. It has the capability to set the variable resistors into high-impedance state.

High impedance mode of DS3904 can be achieved by written the MSB of the selected resistor register to a ‘1′. It is used to generate the High value when combined with a pullup resistor (as seen in the circuit diagram). To generate Low value, the resistor register must be set in position 0 to attain the smallest resistance available from the variable resistors (typically 400W).

By connecting a pullup resistor from each of the H terminal pins to a voltage potential, a HIGH state will be created when the corresponding variable resistor is placed in high-impedance mode (source: maxim-ic.com)

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This entry was posted on Monday, February 1st, 2010 at 8:41 am and is filed under Power Discrette Device. You can follow any responses to this entry through the RSS 2.0 feed. You can skip to the end and leave a response. Pinging is currently not allowed.

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    One Response to “How to Perform DS3904 Digital DIP Switch Resistor into High-Impedance Mode Circuit”

    1. Melinda Strauss says:
      February 15, 2010 at 9:33 pm

      I appreciate the work that you have put in, in this page. Really good,

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