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Cry_Wolf said:Can any body tell me from where can i get these two ics: 89S2051 and 89S4051.
Thanks
HarveyH42 said:https://www.futurlec.com/ICAtmel.shtml
Futurlec ships from Thailand, not sure if there are any restricted countries (doubtful). Downside, shipping is slow, about 3 weeks to USA. If one item in your order is out of stock, they'll hold the entire order until they can fill it. Still waiting on my last order, almost a month now... Needed a barometric sensor. Prices and part quality is great though, if you don't mind the wait.
Jirka46 said:They do not wait, they just substitute part according to their fancy. I ordered some 16F877A's and they sent me 16LF877A's more expensive but for me useless because they go only to 10Mhz. I kept them because it would take two month for return mail, but it is last time I order from them.
Jirka
Jirka46 said:They do not wait, they just substitute part according to their fancy. I ordered some 16F877A's and they sent me 16LF877A's more expensive but for me useless because they go only to 10Mhz. I kept them because it would take two month for return mail, but it is last time I order from them.
Jirka
Nigel Goodwin said:Did you try the 16LF877A's at 20MHz?, I'd be surprised if they didn't work perfectly.
Jirka46 said:They do not wait, they just substitute part according to their fancy. I ordered some 16F877A's and they sent me 16LF877A's more expensive but for me useless because they go only to 10Mhz. I kept them because it would take two month for return mail, but it is last time I order from them.
Jirka
I think in Most cases, that is the way to go, however, I was reading in a forum, and sorry, I can't remember where, that Microchip had condoned the use a much higher clock frequency, of one of its 18fxxx processors beyond the figures given in the data sheet, for a large company building applications with this chip. The figure in the data sheet is the speed which MicroChip guarantees the chip to operate. You may get a particular chip which is able to run much faster, though.Jirka46 said:I did not try it. I think some might work and others not and they might quit under extreme conditions. Generaly I do not think it is a good idea to use parts beyond manufacturer's specs.
Jirka