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DS90UB953-Q1: The ds90ub953 datasheet page 24 says the min load 35kohm, what does it mean? Do we need to pull up or pull down to the CLK_OUT/IDX pin?

Frank Xiao
Genius 12055 points
Part Number: DS90UB953-Q1

Hi team,

The ds90ub953 datasheet page 24 says the min load 35kohm, what does it mean? Do we need to pull up or pull down to the CLK_OUT/IDX pin? Thanks.

  • 0
    TI__Intellectual 1565 points
    Hi Frank,

    The IDX function requires two resistors; Rhigh and Rlow in Table 8 and Figure 11. One goes to 1.8V and the other to ground.

    The recommended resistors in Table 8 meet the 35k ohm requirement. If you select resistors other than the ones we recommend, make sure the load impedance is 35k ohm or greater.

    Mike