I can identify with that challenge. :o( I have a product still in the field that uses an ICL7109 A/D converter. Some customers keep their products as long as they are working and it is good will to keep supporting them. I have made some pluggable daughter boards on occasion, and sent them off for the customer to plug them in, in place of a chip, because the customer did not want to upgrade. I suppose I could have said "have to upgrade." But I would not feel comfortable with that. You are fortunate to still find the 7490. -----Original Message----- From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] On Behalf Of TOMTOM Sent: Friday, June 30, 2006 12:56 PM To: Microcontroller discussion list - Public. Subject: Re: [EE] Where have all the 7490's gone? One of the reasons why the 7490 has become obsolete (scarce if you prefer) is because they are a high current, high heat device compared with the newer technology (CMOS, etc.). The 74LS Series is an improvement in speed but still relatively high current and heat. Many designers are considering low voltage devices as a result of the increased demand for portable, battery powered stuff. I would thing that newer designs for production quantities would consider alternatives to the 74xx or 74LSxx devices. That being said, it is just MHO. ----- Original Message ----- From: "PicDude" To: "Microcontroller discussion list - Public." Sent: Friday, June 30, 2006 1:45 AM Subject: Re: [EE] Where have all the 7490's gone? > Nice resource -- thanks. > -Neil. > > > On Wednesday 28 June 2006 17:51, Harold Hallikainen wrote: >> I'm finding them at various places in LS and HC. Try >> http://www.findchips.com . >> >> Harold >> >> > Why have all the 74xx90's (decade counters) disappeared suddenly? My >> > usual >> > sources (Digikey & Mouser) are claiming that they're >> > discontinued/obsolete. >> > Anyone know where I can get just 10-12 of these in SOIC packaging? >> > Have >> > some >> > PCB's already made from over a year ago that I need these for, so it's >> > not a >> > simple matter of choosing a different part. >> > >> > Cheers, >> > -Neil. >> > -- >> > http://www.piclist.com PIC/SX FAQ & list archive >> > View/change your membership options at >> > http://mailman.mit.edu/mailman/listinfo/piclist >> >> -- >> FCC Rules Updated Daily at http://www.hallikainen.com - Advertising >> opportunities available! > -- > http://www.piclist.com PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist