I designed a -very simple- circuit powered by a 12V battery. I would like to add a sd card connector (its type is of no importance right now) on that circuit.

But I am concerned by the datasheets I find on the net:

  • first. No operation voltage?
  • second. How could I possibly feed a huge 250VAC RMS with my circuit?
  • third. 100 VAC max is approx 70V DC (100 * 2sq2). Way too much as well.
  • fourth. According to Ohm's law, I could put a 24 ohms resistor and be good.

I am pretty sure I miss something because one find those in every SoCs.

Could we make those fit my circuit anyway? (how?)


I get the feeling that you do not understand these datesheets.

That 250 VAC is what the connector can survive without getting damaged. It does not mean that it needs 250 VAC to work !

Not even going into your 70V remark (too irrelevant).

An SD card connector takes an SD card and connects it to a chip (that could be a SoC) with an SD card interface. That's it. You need to think about what a connector does. It connects, that is it.

So just pick a connector that fits your needs (size wise and price wise), ignore the electrical specs as it does not matter.

  • \$\begingroup\$ 70V => Actually it it 100 * .636 = 63.6V, right? \$\endgroup\$ – Larry Oct 6 '16 at 9:34
  • 1
    \$\begingroup\$ It is not clear to me what your interest in this 100 VAC is. 100 VAC is a lot more than any SD card or SD card interface on a chip can handle. 100VAC RMS has a peak voltage of 141 V maybe that is what you mean. But anyway, it is irrelevant. \$\endgroup\$ – Bimpelrekkie Oct 6 '16 at 9:43

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