Guest Report post Posted July 28, 2012 For Multiplexer and Demultiplexer you need the TTL CMOS Digital ICs (74 LS Family).Here is five DataSheets...1. 74 1512. 74 LS 138 (FairChild)3. 74 LS 138 (ON Semiconductor)4. 74 LS 293 A (Motorola)5. 74 LS 293 A (Texas Instruments)* * *Download Here; PersianGighttp://wdl.persiangig.com/pages/download/?dl=http://betaman.persiangig.com/TTL%20CMOS%20Digital%2074LS%20ICs.zip Share this post Link to post Share on other sites