Re: Plastic or ceramic ICs?
Just checked a data sheet for the basic SN5400/ 7400 as published in a TI book from 1973. The only differences in the electrical parameters are the supply voltage tolerance previously mentioned and the slighly higher short circuit output current of the 5400 at its max supply voltage, no doubt accounted for by the fact that the 5400 has a slightly higher max supply voltage than the 7400.
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