>>So how come the datasheet indicates higher typical Icc for the 508A than the 508? The best reason I have heard on this list so far is the more precise clock of the 508A needs more power for this increased stability. I would like to hear the "official" explanation. John Clark, Software Engineer mailto:JohnC@inter-intelli.com (317) 715-8175 (voice & fax) Interactive Intelligence, Inc. 3500 DePauw Blvd., Suite 1060 Indianapolis, IN 46268-1136 http://www.inter-intelli.com > -----Original Message----- > From: Guy Sirton [SMTP:dansoft@MAIL.INTER.NET.IL] > Sent: Monday, March 15, 1999 11:05 AM > To: PICLIST@MITVMA.MIT.EDU > Subject: Re: Commercial vs. Industrail grade Integrated Circuits in > vehic > > Hi all, > > On 14 Mar 99 at 18:45, Ry Lato wrote: > > > My ideal goal is to use commercial grade integrated circuits wherever > > possible. > > > I've been following this discussion with interest... > Our local Microchip distributor doesn't stock Industrial grade OTP > 12C508. When I asked him why he said that "everybody" just uses the > commercial grade instead and that they are actually the same chip, no > screening or anything. > So I went and ordered the parts I needed from Digikey (industrial). > But I still wonder... > > How would they screen the chips anyways in case the higher > temperature range would just cause reduction of the IC's lifetime? > (Assuming the same wafer is used...) > And what's the deal with 12C508A and 12LC508A? Smaller geometry = > lower voltage and lower current? So how come the datasheet indicates > higher typical Icc for the 508A than the 508? > > Guy - mlsirton@inter.net.il