>
> 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
>
> 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
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
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
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
Pin-out?
Data sheet?
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
> 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
> 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
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
> > 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
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
> 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
> > 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?
> Is it on any boards related to the HP1000 or 21MX computers? If so... what
> board?
I doubt it, but it might me. I first came across it on the test board fo
Tony wrote...
-
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?
-
Is it on any boards related to the HP1000 or 21MX computers? If so... what
board?
J
>
> This all assumes it is a TTL and not an ECL or even
> and analog chip, such as an opamp.
Or a resistor network, diode network, transistor array, programmed PROM,
microcontroller,
etc, etc, etc.
As a total aside, on some HP boards there is a 16 pin DIL package with the part
number 1260-033
On 08/04/2015 1:48 PM, dwight wrote:
This all assumes it is a TTL and not an ECL or even
and analog chip, such as an opamp.
Dwight
It might be possible to identify it a bit. Using the Diode Test of your
basic multi-meter you can probably figure out if th
This all assumes it is a TTL and not an ECL or even
and analog chip, such as an opamp.
Dwight
On 08/04/2015 9:25 AM, Noel Chiappa wrote:
So, I took Tony's advice (about parts) to heart, and have been stocking up on
all sorts of things. (Ironically, I now have a _far_ better supply of parts
that I had access to, back in the day, at LCS at MIT! But that's a rant for
another day.)
As part o
On 08/04/2015 11:40 AM, John Robertson wrote:
You could always get one of those inexpensive TTL device identifiers to
see if the house number crosses over:
http://www.ebay.com/itm/281682288251
My Xeltek programmer has that function--and it works for some common TTL
ICs, but gets a lot less r
> From: j...@mercury.lcs.mit.edu
>
snip
>
> It's a 16-pin DIP, with the following on it (in three separate lines):
> "1028126", "D39315-A", and "CS9336P". The first number looks like the numbers
> I've seen on a couple of other un-identified chips, made by TRW. (I hope they
> aren't something c
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