Anyone heard of a DOOF chip?

[James M. Knox]

I hate to be one of the "me too" guys, but I have hit a dead end trying to
identify an IC. The logo looks a bit like a script drawing of a fishhook.
[Yeah, I am sure you can visualize that. <G>] Information on the IC is

2375
62T
DOOF

I do not think (but can't be sure) that it isn't house labeled. Never the
less, I can't find any information on either the chip or the manufacturer.
I'm guessing that it is a power controller or ethernet IC of some kind.

Any leads would be appreciated.


-----------------------------------------------
James M. Knox
TriSoft ph 512-385-0316
1300 Koenig Lane West fax 512-371-5716
Suite 200
Austin, Tx 78756 [email protected]
-----------------------------------------------

 

[[email protected]]

Sounds like a custom chip to me. Had the same problem with another
company (I atleast recognised the company logo). Called them up and
they said the chip was a production run designed for a specific
customer and that the couldn't give out info on it. Gah. DOOF doesn't
sound like a part ref to me (perhaps a manufacturer internal code for
date or run).

I think your stuck unless you can identify the company. What's the
chip suppost to do?

 

[James M. Knox]

[email protected] wrote in @e3g2000cwe.googlegroups.com:

Sounds like a custom chip to me. Had the same problem with another
company (I atleast recognised the company logo).... DOOF doesn't
sound like a part ref to me
I think your stuck unless you can identify the company. What's the
chip suppost to do?

Well, I was stuck... now *I* feel like the "DOOF." I pulled several
more units out of inventory and took them all apart until I found one
with a clear enough imprint to make out. That durn "fishhook" turns out
to be an incredibly badly imprinted outline of the state of Texas. [And
I *live* in Austin, TX.] Yep, it's a TI chip - and exactly as you
guessed... namely once I had the manufacturer, it was easy to figure out
the rest.

It's a TI TPS2375 PoE Ethernet powered device receiver. [If I am ever
elected lord high god of the known universe, one of my first royal
decrees is to make schematics availability MANDATORY for any commercial
product! <G>]

Thanks for the reply...

jmk


-----------------------------------------------
James M. Knox
TriSoft ph 512-385-0316
1300 Koenig Lane West fax 512-371-5716
Suite 200
Austin, Tx 78756 [email protected]
-----------------------------------------------

 

[Franc Zabkar]

Aren't DOOF chips responsible for the sound that subwoofers make?

- Franc Zabkar

 

[Michael A. Terrell]

Aren't DOOF chips responsible for the sound that subwoofers make?

No, that's caused by the Doofus who owns it.


--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.

Michael A. Terrell
Central Florida

 

[Walter Harley]

[If I am ever
elected lord high god of the known universe, one of my first royal
decrees is to make schematics availability MANDATORY for any commercial
product! <G>]

You've got my vote. Can't be any worse than the other DOOFs out there, and
I like your platform.

 

[JW]

I hate to be one of the "me too" guys, but I have hit a dead end trying to
identify an IC. The logo looks a bit like a script drawing of a fishhook.
[Yeah, I am sure you can visualize that. <G>] Information on the IC is

2375
62T
DOOF

I do not think (but can't be sure) that it isn't house labeled. Never the
less, I can't find any information on either the chip or the manufacturer.
I'm guessing that it is a power controller or ethernet IC of some kind.

Any leads would be appreciated.

You could start by looking here and finding the logo:
http://www.aufzu.de/semi/gif/

Good luck.

 

[Hal Murray]

It's a TI TPS2375 PoE Ethernet powered device receiver. [If I am ever

elected lord high god of the known universe, one of my first royal
decrees is to make schematics availability MANDATORY for any commercial
product! <G>]

When I get the chance (ha), I'm going to require that chips be
marked with high contrast ink/whatever so I can read them without
getting the angle just right in good light and ...

 

[Michael Black]

It's a TI TPS2375 PoE Ethernet powered device receiver. [If I am ever
elected lord high god of the known universe, one of my first royal
decrees is to make schematics availability MANDATORY for any commercial
product! <G>]

When I get the chance (ha), I'm going to require that chips be
marked with high contrast ink/whatever so I can read them without
getting the angle just right in good light and ...

I've wondered if that is the mark of the counterfeit IC.

I bought one of those $1.99 FM radios that tune by the press of a button,
to see what was inside. At first, the number was not readable. But
from the circuitry that was there, I made a guess, which was wrong,
but that led to a variant from the same manufacturer that was the
device. At that point, some more squinting revealed that yes,
that must be the number on the IC.

But the marking was so lousy, I assumed it was a bootleg IC. I
can't see why a company would not want their number (and logo) to
be nice and clear. And no, there was no sign of sandpapering.

The marking reminded me of various ICs I got from Poly-Paks circa
1974, the floor sweeping paks, and they had similarly bad markings.

But generally, I can't say I've seen such faint markings on ICs
I've paid decent prices for. Or for that matter, most ICs
I've come across in commercial equipment over the decades.

Michael

 

[Philip Pemberton]

When I get the chance (ha), I'm going to require that chips be
marked with high contrast ink/whatever so I can read them without
getting the angle just right in good light and ...

You could try rubbing powdered chalk on the chip. It gets stuck in the little
grooves the laser-etching leaves behind, and increases the contrast enough to
read the label. It's a trick I've seen used when scanning PCBs to make board
layout images, but it works pretty well for reading off part numbers too.

Or if you don't feel like getting chalk on your fingers, buy a torch
(flashlight, MagLite, ...) and a cheap magnifying glass. It's easier to move a
torch around than it is to manipulate a huge board into just the right
position to read the markings...

 

[James M. Knox]

[email protected] (Michael Black) wrote in @theodyn.ncf.ca:

The marking reminded me of various ICs I got from Poly-Paks circa
1974, the floor sweeping paks, and they had similarly bad markings.

But generally, I can't say I've seen such faint markings on ICs
I've paid decent prices for.

Good grief, someone else who remembers Poly Paks... I bought stuff from
them back in the early 60's. 16 pin IC's (TTL and RTL) with only 15 legs.
Mask ROMs with patterns already burned in (used to be advertised as "Some
bits may be useful"). Transistors with the emitter or collector burned out
(still makes a good diode). Tons of unmarked diodes of every make and
description.

Brings back memories... not all of them good. <G>

BTW, to the person who was talking about using chaulk to bring up the
markings... I have found that chill spray sometimes works as well. Cool
the chip, then blow gently on it. The condensation has a higher light
reflectivity.

-----------------------------------------------
James M. Knox
TriSoft ph 512-385-0316
1300 Koenig Lane West fax 512-371-5716
Suite 200
Austin, Tx 78756 [email protected]
-----------------------------------------------

 

[Baron]

[email protected] (Michael Black) wrote in @theodyn.ncf.ca:


Good grief, someone else who remembers Poly Paks... I bought stuff
from
them back in the early 60's. 16 pin IC's (TTL and RTL) with only 15
legs. Mask ROMs with patterns already burned in (used to be advertised
as "Some
bits may be useful"). Transistors with the emitter or collector
burned out
(still makes a good diode). Tons of unmarked diodes of every make and
description.

Brings back memories... not all of them good. <G>

BTW, to the person who was talking about using chaulk to bring up the
markings... I have found that chill spray sometimes works as well.
Cool
the chip, then blow gently on it. The condensation has a higher light
reflectivity.

-----------------------------------------------
James M. Knox
TriSoft ph 512-385-0316
1300 Koenig Lane West fax 512-371-5716
Suite 200
Austin, Tx 78756 [email protected]
-----------------------------------------------

Poly Pak...... We're giving our ages away ;-)

 

[mark]

Poly Pak...... We're giving our ages away ;-)

you're making me feel very old now.