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Current Rating across all Pins on SX28AC/DP... — Parallax Forums

Current Rating across all Pins on SX28AC/DP...

jdouganjdougan Posts: 6
edited 2009-06-16 14:03 in General Discussion
I have a simple question (I think), but I just can't find the answer.

I know that the SX28AC/DP has 45ma rating per output pin, but·what is the MAX ma's across all pins?

Example: BS1 allows 20ma per pin with a MAX of 40ma across all pins.

Comments

  • BeanBean Posts: 8,129
    edited 2009-06-16 12:39
    According to the datasheet rev 1.6 the max current of the device is 130mA.
    So as long as you don't go over that (including current used for clocking the SX itself) you should be okay.

    Bean.

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  • jdouganjdougan Posts: 6
    edited 2009-06-16 14:03
    Thanks Bean, I guess it didn't catch that since it wasn't spelled out as clear as the BS document.

    I guess it really doesn't matter because I need to load it with 140mA across the pins, so I am going to use a few transistors.

    If I am reading this correctly, I can deduct 8mA when I have my clocking set to 4MHz. Correct?
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