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Implementing NAND gate in LTspice?

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I wish to do a NAND latch in LTspice.

Do you know how to get a NAND gate?

....i used the "SN74LVC1G57" model from the LTspice yahoo forum website, but it doesnt just keeps telling me "cannot find SN74LVC1G5x.lib"......i dont know why it says that, because i am not using "SN74LVC1G5x", i am using "SN74LVC1G57".

I put the .sub file in the schematic as a spice directive, so it should have seen it.....also, the symbol correctly has the prefix "x" so i cannot see how it did not work?

I have often used third party devices in LTspice, but cannot get a NAND gate to work.

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