I have a ALTERA MAX3000A CPLD with two inscriptions:
EPM3256AFC256-7 --> commercial temp, speed grade 7 and EPM3256AFI256-10 --> industrial temp, speed grade 10
I bought the industrial one. Are this two CPLDs equivalent??? If yes -> if I buy the commercial, speed grade 7 - is this CPLD equivalent to the industrial temp, speed grade 10???
Thanks for your answers in advance, Manfred
Double marking is a standard practice for many chip manufacturers including Lattice. If the part is marked for commercial and industrial with different speed grades, it means the part has been characterized and presumably tested to meet those speed grades at the associated range of temperatures specified for commercial or industrial parts.
Generally this double marking is noted in the data sheets and you can "cross-order" the equivalent part using the other number. The price is generally the same, too. If there is no such policy noted in the data sheet, I would suggest ordering the part using the number you need, since there is no guarantee that another batch of parts will be dual-marked and more importantly dual-characterized and tested.
Regards, Gabor
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