Help me ID this IC

H

Hans O

Guest
Any help would be appreciated.

http://pweb.netcom.com/~p1001/UNKNOWN_IC.JPG

Thanks, Hans O
 
"Hans O" <p1001@ix.netcom.com> wrote in message
news:3FF618C8.8040907@ix.netcom.com...
Any help would be appreciated.

http://pweb.netcom.com/~p1001/UNKNOWN_IC.JPG

Thanks, Hans O

Don't know what the chip does, but 5619073 sure looks like an IBM internal
Click to expand...
part number....Paul
 
PJ wrote:

"Hans O" <p1001@ix.netcom.com> wrote in message
news:3FF618C8.8040907@ix.netcom.com...
Any help would be appreciated.

http://pweb.netcom.com/~p1001/UNKNOWN_IC.JPG

Thanks, Hans O

Don't know what the chip does, but 5619073 sure looks like an IBM internal
part number....Paul
Click to expand...
With a National Semiconductor logo on it? The only thing I can tell is that it
was manufactured
21st week of 1982.

Regards
Thomas
 
"Thomas Rudloff" <thomas_rudloff@gmx.net> wrote in message
news:3FF62CE3.F48AF8C6@gmx.net...
PJ wrote:

"Hans O" <p1001@ix.netcom.com> wrote in message
news:3FF618C8.8040907@ix.netcom.com...
Any help would be appreciated.

http://pweb.netcom.com/~p1001/UNKNOWN_IC.JPG

Thanks, Hans O

Don't know what the chip does, but 5619073 sure looks like an IBM
internal
part number....Paul

With a National Semiconductor logo on it? The only thing I can tell is
that it
was manufactured
21st week of 1982.

Regards
Thomas

It's called a house number. IBM bought chips from a great many
Click to expand...
vendors...Paul
 
In article <bt5fsu$3c2u3$1@ID-87464.news.uni-berlin.de>,
packrat_paul@hotmail.com mentioned...
"Thomas Rudloff" <thomas_rudloff@gmx.net> wrote in message
news:3FF62CE3.F48AF8C6@gmx.net...
PJ wrote:

"Hans O" <p1001@ix.netcom.com> wrote in message
news:3FF618C8.8040907@ix.netcom.com...
Any help would be appreciated.

http://pweb.netcom.com/~p1001/UNKNOWN_IC.JPG

Thanks, Hans O

Don't know what the chip does, but 5619073 sure looks like an IBM
internal
part number....Paul

With a National Semiconductor logo on it? The only thing I can tell is
that it
was manufactured
21st week of 1982.

Regards
Thomas

It's called a house number. IBM bought chips from a great many
vendors...Paul
Click to expand...
Yeah, and the funny part is that even tho IBM is one of the biggest,
if not the bigest maker of chips, their appetite for them is so
voracious that they have to go outside of the company for more. Must
be all those ASCI Blue massively parallel supercomputers that seem to
require the total output of all of Malaysia, just for the processors!


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Hans O wrote:
Any help would be appreciated.

http://pweb.netcom.com/~p1001/UNKNOWN_IC.JPG

Thanks, Hans O

Hans,
Click to expand...

it is certainly a National Semiconductor manufactured part, quite old as
the date code appears to be 8221 (21st week of 1982). The metal lid is very
large, suggesting a large cavity and large die. The die is large for 1982
suggesting a memory chip, possibly RAM or DRAM.

regards...

--Gary
 
Gary Morton wrote:

Hans O wrote:
Any help would be appreciated.

http://pweb.netcom.com/~p1001/UNKNOWN_IC.JPG

Thanks, Hans O

Hans,

it is certainly a National Semiconductor manufactured part, quite old as
the date code appears to be 8221 (21st week of 1982). The metal lid is very
large, suggesting a large cavity and large die. The die is large for 1982
suggesting a memory chip, possibly RAM or DRAM.
Click to expand...
Could be a 64k*1 DRAM. Date, case and die size fit perfect. Is there a
memory bank on the pcb or did you get only single chips?

Regards
Thomas
 
I have a tube of these ICs but can't tell you what they were
pulled from. I called National's tech line, they can't ID
their own chip either. A reliable source from the Arcade
newsgroup tagged them as a LF13331 analog switch. Package and
date code fits. Any seconds? Datasheet?

Thomas Rudloff wrote:
Gary Morton wrote:


Hans O wrote:

Any help would be appreciated.

http://pweb.netcom.com/~p1001/UNKNOWN_IC.JPG

Thanks, Hans O


Hans,

it is certainly a National Semiconductor manufactured part, quite old as
the date code appears to be 8221 (21st week of 1982). The metal lid is very
large, suggesting a large cavity and large die. The die is large for 1982
suggesting a memory chip, possibly RAM or DRAM.


Could be a 64k*1 DRAM. Date, case and die size fit perfect. Is there a
memory bank on the pcb or did you get only single chips?

Regards
Thomas
Click to expand...
 
Yup,

http://www.national.com/pf/LF/LF13331.html

Regards
Thomas


Hans O wrote:

I have a tube of these ICs but can't tell you what they were
pulled from. I called National's tech line, they can't ID
their own chip either. A reliable source from the Arcade
newsgroup tagged them as a LF13331 analog switch. Package and
date code fits. Any seconds? Datasheet?

Thomas Rudloff wrote:
Gary Morton wrote:


Hans O wrote:

Any help would be appreciated.

http://pweb.netcom.com/~p1001/UNKNOWN_IC.JPG

Thanks, Hans O


Hans,

it is certainly a National Semiconductor manufactured part, quite old as
the date code appears to be 8221 (21st week of 1982). The metal lid is very
large, suggesting a large cavity and large die. The die is large for 1982
suggesting a memory chip, possibly RAM or DRAM.


Could be a 64k*1 DRAM. Date, case and die size fit perfect. Is there a
memory bank on the pcb or did you get only single chips?

Regards
Thomas
Click to expand...
 
In article <3FF6ED46.4000303@ix.netcom.com>,
Hans O <p1001@ix.netcom.com> wrote:
I have a tube of these ICs but can't tell you what they were
pulled from. I called National's tech line, they can't ID
their own chip either. A reliable source from the Arcade
newsgroup tagged them as a LF13331 analog switch. Package and
date code fits. Any seconds? Datasheet?
Click to expand...
It shares a datasheet with the LF11331, and is in both the 1980 Linear
databook, and the 1980 Data Conversion book. Let me know if you
need a scan of it.

Mark Zenier mzenier@eskimo.com Washington State resident
 
Hiya!

I presume your using these on Star Wars, and other AVG Atari stuff? I've
found the DG201BDJ is a perfect replacement in that app, is cheap, and
current.

Yours, Mark.

Thomas Rudloff wrote:

Yup,

http://www.national.com/pf/LF/LF13331.html

Regards
Thomas


Hans O wrote:


I have a tube of these ICs but can't tell you what they were
pulled from. I called National's tech line, they can't ID
their own chip either. A reliable source from the Arcade
newsgroup tagged them as a LF13331 analog switch. Package and
date code fits. Any seconds? Datasheet?

Thomas Rudloff wrote:

Gary Morton wrote:



Hans O wrote:


Any help would be appreciated.

http://pweb.netcom.com/~p1001/UNKNOWN_IC.JPG

Thanks, Hans O


Hans,

it is certainly a National Semiconductor manufactured part, quite old as
the date code appears to be 8221 (21st week of 1982). The metal lid is very
large, suggesting a large cavity and large die. The die is large for 1982
suggesting a memory chip, possibly RAM or DRAM.


Could be a 64k*1 DRAM. Date, case and die size fit perfect. Is there a
memory bank on the pcb or did you get only single chips?

Regards
Thomas
Click to expand...
 
"Watson A.Name - Watt Sun, Dark Remover" wrote:
Yeah, and the funny part is that even tho IBM is one of the biggest,
if not the bigest maker of chips, their appetite for them is so
voracious that they have to go outside of the company for more. Must
be all those ASCI Blue massively parallel supercomputers that seem to
require the total output of all of Malaysia, just for the processors!
Click to expand...
Yup. They use (used to use?) vast quantities of VTL chips (complete
with familiar logos), that are actually what the rest of the world calls
TTL. I was told the "V" stands for "vendor".
 
Hans O wrote:
Any help would be appreciated.

http://pweb.netcom.com/~p1001/UNKNOWN_IC.JPG

Thanks, Hans O
Click to expand...

"LF13331 quad analog switch (n. open)" ?
Don't ask me where I got this info.
 
Michael wrote:
"LF13331 quad analog switch (n. open)" ?
Don't ask me where I got this info.
Click to expand...
I can tell you the list is dated 6/78
 
quad SPST JFET Analog Switches,4 normally
open switches with disable,need a page scan(11 pages)?
? "Michael" <NoSpam@att.net> ?????? ??? ??????
news:3FF837B4.CFFC3B57@att.net...
Michael wrote:
"LF13331 quad analog switch (n. open)" ?
Don't ask me where I got this info.

I can tell you the list is dated 6/78
Click to expand...
 
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