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pull up resistor

Discussion in 'Electronic Repair' started by Orange, Jul 31, 2004.

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  1. Orange

    Orange Guest

    I've got some instructions that tell me to connect 470 ohm pull up
    resistor to pin number 43 of chip.
    Is that OK? (I've heard that pull up resistors are usually 10Kohms or
    47 Kohms)

    The resistor should be connected between pin 43 and +5V , or am I
    wrong?
     
  2. It depends on what the purpose of the pullup is. If it is to provide
    current for an output that is driving a significant load, 470 ohms
    could indeed be correct.

    If it's just to hold an input high, then the value doesn't matter much
    but is generally 5K or 10K.

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