RE: Unidentified chip -- Spoiler for HP 1260-0339

2015-08-07 Thread tony duell
> > It doesn't even shunt across; it's just 16 pins in a DIL package > "floating"? Strange. If it were a manufacturing test, one wouldn't expect > it would show up in production machines? Yes. It is just 16 pins unconnected to each other. As I mentioned some messages ago it is used as a connecto

RE: Unidentified chip -- Spoiler for HP 1260-0339

2015-08-06 Thread tony duell
> > And come to think of it, I bet those dummy chips were used for > training people to hand stuff boards as well. The Amstrad PCW8256 (word processor) came with 256K of RAM but could be expanded to 512K essentially by adding another 8 41256 DRAM chips. Some companies in the UK sold the 9-chi

Re: Unidentified chip -- Spoiler for HP 1260-0339

2015-08-06 Thread Sean Caron
It doesn't even shunt across; it's just 16 pins in a DIL package "floating"? Strange. If it were a manufacturing test, one wouldn't expect it would show up in production machines? Best, Sean On Thu, Aug 6, 2015 at 3:17 PM, geneb wrote: > On Thu, 6 Aug 2015, Eric Smith wrote: > > On Thu, Aug 6

Re: Unidentified chip -- Spoiler for HP 1260-0339

2015-08-06 Thread Jon Elson
On 08/06/2015 02:25 PM, William Donzelli wrote: It could also be a chip used to test an auto-insertion machine or wave solder machine. If memory serves, they'll use correctly pinned but "fake" parts to test those processes before moving to the more expensive real thing. Yes, there were a few co

Re: Unidentified chip -- Spoiler for HP 1260-0339

2015-08-06 Thread Kyle Owen
On Aug 6, 2015 6:00 PM, "Fred Cisin" wrote: > > Pin-out? > > Data sheet? > I'll dig them out when I'm home again in a couple of weeks. I saved them from the trash, figuring they could at least be used for art projects. I'll let them go for the cost of shipping. Kyle

Re: Unidentified chip -- Spoiler for HP 1260-0339

2015-08-06 Thread Fred Cisin
Pin-out? Data sheet?

Re: Unidentified chip -- Spoiler for HP 1260-0339

2015-08-06 Thread Kyle Owen
On Aug 6, 2015 3:26 PM, "William Donzelli" wrote: > > Yes, there were a few companies that made dummy chips for exactly that > reason. These days, the robots are much better, so I doubt the > practice of using dummy chips still exists. > I've got tubes of them if anyone's interested. Not that any

Re: Unidentified chip -- Spoiler for HP 1260-0339

2015-08-06 Thread William Donzelli
> Yes, there were a few companies that made dummy chips for exactly that > reason. These days, the robots are much better, so I doubt the > practice of using dummy chips still exists. And come to think of it, I bet those dummy chips were used for training people to hand stuff boards as well. -- W

Re: Unidentified chip -- Spoiler for HP 1260-0339

2015-08-06 Thread William Donzelli
> It could also be a chip used to test an auto-insertion machine or wave > solder machine. If memory serves, they'll use correctly pinned but "fake" > parts to test those processes before moving to the more expensive real > thing. Yes, there were a few companies that made dummy chips for exactly

Re: Unidentified chip -- Spoiler for HP 1260-0339

2015-08-06 Thread geneb
On Thu, 6 Aug 2015, Eric Smith wrote: On Thu, Aug 6, 2015 at 10:22 AM, tony duell wrote: Amazingly there is nothing inside that 16pin DIL package. No silicon chip, no thick-film resistor network, nothing. It is just a package with the pins. Are you sure? They might have gotten a really good

RE: Unidentified chip -- Spoiler for HP 1260-0339

2015-08-06 Thread tony duell
> > Amazingly there is nothing inside that 16pin DIL package. No silicon chip, > > no thick-film resistor > > network, nothing. It is just a package with the pins. > > Are you sure? They might have gotten a really good deal on Well, I've not x-rayed one, but I could detect no conductivity or dio

Re: Unidentified chip -- Spoiler for HP 1260-0339

2015-08-06 Thread Eric Smith
On Thu, Aug 6, 2015 at 10:22 AM, tony duell wrote: > Amazingly there is nothing inside that 16pin DIL package. No silicon chip, no > thick-film resistor > network, nothing. It is just a package with the pins. Are you sure? They might have gotten a really good deal on house-marked Signetics 25120

RE: Unidentified chip -- Spoiler for HP 1260-0339

2015-08-06 Thread tony duell
> As a total aside, on some HP boards there is a 16 pin DIL package with the > part number 1260-0339. > Any ideas what that chip is? What chip? Amazingly there is nothing inside that 16pin DIL package. No silicon chip, no thick-film resistor network, nothing. It is just a package with the pins