Joe, The Mouser part number for the chips is 913-AS6C62256A-70PCN for the through hole version, last three letters are SIN for the SOP package. I'll dig a bit deeper into the firmware upgrade over the weekend. Steve On Wed, Nov 30, 2011 at 10:20 PM, J. L. Trantham wrote: > My impression is that it is a pre-programmed chip (or chips) that you > just > need to install. Perhaps you could get the single chip, read it, > break the > file apart, program the 'set', and go from there. > > Thanks for the info re Mouser. > > Joe > > -----Original Message----- > From: volt-nuts-bounces@febo.com [mailto:volt-nuts-bounces@febo.com] > On > Behalf Of Steve > Sent: Wednesday, November 30, 2011 10:04 PM > To: Discussion of precise voltage measurement > Subject: Re: [volt-nuts] 3458A firmware update > > Joe, > > The chips are from Mouser - Alliance Semiconductor 62256, low power, > 70 ns > through hole as the board was socketed from the factory. I will need > to dig > through some paperwork for the exact part number. Also need to open > the unit > to see which version of the upgrade I would need. Agilent's price for > the > single chip isn't too bad but the multichip price is a bit high, > especially > if I can burn them myself. > > Steve > > > > On Nov 30, 2011, at 9:48 PM, "J. L. Trantham" <jltran@att.net> wrote: > >> Forgot to ask, where did you get the chips? SMT or through hole? >> >> Joe >> >> -----Original Message----- >> From: volt-nuts-bounces@febo.com [mailto:volt-nuts-bounces@febo.com] >> On >> Behalf Of Steve Krull >> Sent: Wednesday, November 30, 2011 8:25 PM >> To: Discussion of precise voltage measurement >> Subject: [volt-nuts] 3458A firmware update >> >> Has anyone archived a copy of the rev 9,2 firmware anywhere? I >> replaced the NVRAM a few months ago and just added Option 001 (about >> $6 for the four chips) and I'd like to try to upgrade the firmware >> from the current 7,0. >> >> Thanks, >> >> Steve >> WBØDBS >> >> >> _______________________________________________ >> volt-nuts mailing list -- volt-nuts@febo.com >> To unsubscribe, go to >> https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts >> and follow the instructions there. >> >> >> _______________________________________________ >> volt-nuts mailing list -- volt-nuts@febo.com >> To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts >> and follow the instructions there. > > _______________________________________________ > volt-nuts mailing list -- volt-nuts@febo.com > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts > and follow the instructions there. > > > _______________________________________________ > volt-nuts mailing list -- volt-nuts@febo.com > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts > and follow the instructions there.

Steve, Thanks for the info on the RAM chips. I had an order going to DigiKey and added the chips to that order. A couple of dollars more but only one shipping charge. I forgot to mention that I have REV 8 firmware archived that I got from the single M27C4002 EPROM in my 'new' 3458A that dates to 1997. Agilent lists it as obsolete. I got a M27C4096 from Jameco (more expensive but quicker than China), programmed it with the firmware and it worked just fine. If you would like REV 8, let me know. I have not looked but it might already be out there somewhere. Joe -----Original Message----- From: volt-nuts-bounces@febo.com [mailto:volt-nuts-bounces@febo.com] On Behalf Of Steve Krull Sent: Thursday, December 01, 2011 10:13 AM To: volt-nuts@febo.com Subject: Re: [volt-nuts] 3458A firmware update Joe, The Mouser part number for the chips is 913-AS6C62256A-70PCN for the through hole version, last three letters are SIN for the SOP package. I'll dig a bit deeper into the firmware upgrade over the weekend. Steve On Wed, Nov 30, 2011 at 10:20 PM, J. L. Trantham wrote: > My impression is that it is a pre-programmed chip (or chips) that you > just > need to install. Perhaps you could get the single chip, read it, > break the > file apart, program the 'set', and go from there. > > Thanks for the info re Mouser. > > Joe > > -----Original Message----- > From: volt-nuts-bounces@febo.com [mailto:volt-nuts-bounces@febo.com] > On > Behalf Of Steve > Sent: Wednesday, November 30, 2011 10:04 PM > To: Discussion of precise voltage measurement > Subject: Re: [volt-nuts] 3458A firmware update > > Joe, > > The chips are from Mouser - Alliance Semiconductor 62256, low power, > 70 ns > through hole as the board was socketed from the factory. I will need > to dig > through some paperwork for the exact part number. Also need to open > the unit > to see which version of the upgrade I would need. Agilent's price for > the > single chip isn't too bad but the multichip price is a bit high, > especially > if I can burn them myself. > > Steve > > > > On Nov 30, 2011, at 9:48 PM, "J. L. Trantham" <jltran@att.net> wrote: > >> Forgot to ask, where did you get the chips? SMT or through hole? >> >> Joe >> >> -----Original Message----- >> From: volt-nuts-bounces@febo.com [mailto:volt-nuts-bounces@febo.com] >> On >> Behalf Of Steve Krull >> Sent: Wednesday, November 30, 2011 8:25 PM >> To: Discussion of precise voltage measurement >> Subject: [volt-nuts] 3458A firmware update >> >> Has anyone archived a copy of the rev 9,2 firmware anywhere? I >> replaced the NVRAM a few months ago and just added Option 001 (about >> $6 for the four chips) and I'd like to try to upgrade the firmware >> from the current 7,0. >> >> Thanks, >> >> Steve >> WBØDBS >> >> >> _______________________________________________ >> volt-nuts mailing list -- volt-nuts@febo.com >> To unsubscribe, go to >> https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts >> and follow the instructions there. >> >> >> _______________________________________________ >> volt-nuts mailing list -- volt-nuts@febo.com >> To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts >> and follow the instructions there. > > _______________________________________________ > volt-nuts mailing list -- volt-nuts@febo.com > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts > and follow the instructions there. > > > _______________________________________________ > volt-nuts mailing list -- volt-nuts@febo.com > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts > and follow the instructions there. _______________________________________________ volt-nuts mailing list -- volt-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts and follow the instructions there.