Fozzy The Bear Posted February 6, 2010 Report Share Posted February 6, 2010 (edited) Hi guys, Can anybody give me some pointers here..... I've got a shedload of 74HC164N shift registers in a 14 pin dip package. Are these interchangeable in any way with the 74HC165 shown as used in the DIN Module ??? I know the 74HC165 is a 16 pin package, so I'm guessing these are probably no use to me for this. If they are of use, then can anybody explain the difference between the two chips please. voltage requirements, performance etc etc.... Please bear in mind that my knowledge of this sort of electronics is very basic and I'm pretty new to some of this stuff. Best Regards, Julian (Fozzy The Bear) Edited February 6, 2010 by Fozzy The Bear Quote Link to comment Share on other sites More sharing options...
lylehaze Posted February 7, 2010 Report Share Posted February 7, 2010 Hi guys, Can anybody give me some pointers here..... I've got a shedload of 74HC164N shift registers in a 14 pin dip package. Are these interchangeable in any way with the 74HC165 shown as used in the DIN Module ??? I know the 74HC165 is a 16 pin package, so I'm guessing these are probably no use to me for this. If they are of use, then can anybody explain the difference between the two chips please. voltage requirements, performance etc etc.... Please bear in mind that my knowledge of this sort of electronics is very basic and I'm pretty new to some of this stuff. Best Regards, Julian (Fozzy The Bear) OK.. so there's not much traffic on this question.. I'll toss in a few bits, but I have not researched it completely. The two chips you describe are both "74HC", so they have the same voltage range, the same levels for low and high, and similar drive capabilities. The 74HC164 is a serial to parallel shift register. So that would be more useful as a DOUT chip.. taking a serial signal input and pushing it out eight different pins. But I'm not claiming that it would work without modifying the MIOS output driver. details like whether the data is clocked on the rising or falling edge, whether the outputs are inverted or not.. lots of details could make it interesting. When I want to know more about a chip, I find its datasheet and read it. One good place to get those is from Digi-Key. Have Fun, LyleHaze Quote Link to comment Share on other sites More sharing options...
Fozzy The Bear Posted February 7, 2010 Author Report Share Posted February 7, 2010 (edited) When I want to know more about a chip, I find its datasheet and read it. One good place to get those is from Digi-Key. Have Fun, LyleHaze Thanks for your thoughts on this Lyle. You're absolutely right. I should have done more research. I guess the answer on the whole, is, unless I want to re-write sections of MIOS to stick with the specified chips. I know they only cost pennies anyway, so it's not a big deal. I just thought there might be an easy way to press them into service. They came in allong with a lot of other components in a bulk deal. I'll stick them in the spares box for now until I find a use for them. Thanks again for your reply! Best Regards, Julian (Fozzy The Bear) Edited February 7, 2010 by Fozzy The Bear Quote Link to comment Share on other sites More sharing options...
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