Does an IC signal pin need a resistor between it and a 5 V power supply?

Discussion in 'Analog & Mixed-Signal Design' started by seanspotatobusiness, Jun 5, 2017.

  1. seanspotatobusiness

    Thread Starter Member

    Sep 17, 2016
    188
    3
    I want to use a laptop display inverter with an LX1686 controller. According to the datasheet the ENABLE pin has a threshold of 2.7-3.6 V. Presumably that means it will also be fine at 5 V which is the voltage required by the inverter board. I was therefore intending to connect the ENABLE pin directly to the 5 V power source. I was wondering whether that's okay or whether there ought to be a resistor between the pin and the 5 V power?
     
    DickCappels likes this.
  2. AlbertHall

    AAC Fanatic!

    Jun 4, 2014
    8,129
    2,015
    One of their example circuits shows it connected directly to the supply but it does have an internal pull-up. Below is a paragraph from the datasheet.
    upload_2017-6-5_22-5-10.png
     
    seanspotatobusiness likes this.
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