Now this sounds like a real challenge... If you plan to stick with standard logic then for each of the two lines a set of
either 15pc 74x138 multiplexed by a 74x154 or 8pc 74x154 multiplexed by a 74x138 comes to mind. If it is at all feasible this way depends much on the data rate you are expecting on those lines, on the lengths of the lines,..... A more modern variant would be the use of a programmed gate array, such as the Altera EPF10K10QC208 which gives you 134 programmable i/o pins in a 208 pin package or the Xilinx XC95216-10PQ160C with 133 i/o pins in a 160 pin package. But these solutions ask for additional hard- and software to program the gate matrix inside... Uwe. > hello, > > im wanting to multiplex 2 digital lines, to 120 channels (pairs) using > digital switches > > can some suggest a digital chip with the most channels on it, please? > Best regards > Darren Logan -- Author: Uwe Zimmermann INET: [EMAIL PROTECTED] Fat City Hosting, San Diego, California -- http://www.fatcity.com --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB CHIPDIR-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
