razzjazz192
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Help identifying tiny chip

Tue May 11, 2021 1:37 am

Hi All,

I recently ordered a bunch of electronic components, and out of one of those packages, there was a little ziplock baggie with about five of these extremely tiny....well, I don't know exactly what it is, but it looks like a chip of some sort, something with connectors on the back, I'll have to post a pic of that later. I wondered if anyone has seen anything like this before, so that I might
strange.jpg
strange.jpg (56.31 KiB) Viewed 1852 times
know what to do with it. Here is an image. Thanks in advance for any info.[*]Image

scotty101
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Re: Help identifying tiny chip

Tue May 11, 2021 8:41 am

Off topic but someone has already reported that.

How about a close up photo of this "thing" so that someone might actually stand a chance of identifying it?
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MiscBits
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Re: Help identifying tiny chip

Tue May 11, 2021 11:43 am

I would ask the supplier...
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Heater
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Re: Help identifying tiny chip

Tue May 11, 2021 3:34 pm

What is that picture?

It looks like you have cut and pasted an image of some chip or whatever into some other picture of a screen.

Perhaps it would help if you list here what that "bunch of electronic components" you ordered was.
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pidd
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Re: Help identifying tiny chip

Tue May 11, 2021 5:19 pm

Looks like a micro-miniature switch, what is on the other side? Who was the supplier? Its probably in their catalogue.

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Burngate
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Re: Help identifying tiny chip

Tue May 11, 2021 5:25 pm

razzjazz192 wrote:
Tue May 11, 2021 1:37 am
I recently ordered a bunch of electronic components, and out of one of those packages, ...
Who from? What components? What else was in that package?

LTolledo
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Re: Help identifying tiny chip

Tue May 11, 2021 9:42 pm

based on the image presented I can only identify it as a U.S.T.

"Unidentifiable Something Thingy"

:mrgreen:
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davidcoton
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Re: Help identifying tiny chip

Tue May 11, 2021 9:55 pm

LTolledo wrote:
Tue May 11, 2021 9:42 pm
based on the image presented I can only identify it as a U.S.T.

"Unidentifiable Something Thingy"

:mrgreen:
No, not one of them. It's clearly a Whotsit. Made by the Widget division of Acme Corp.
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razzjazz192
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Re: Help identifying tiny chip

Thu May 13, 2021 11:45 pm

I'll take better photos with my SLR in the morning and post them. It came in a package from sparkfun, I think, but I didn't see anything on their site like that. Now there's another chip almost as small, which I identified as some sort of onboard memory for cars.......I'll post that too. No copy and paste, I promise, it's a real...something

razzjazz192
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Re: Help identifying tiny chip

Fri May 14, 2021 1:17 pm

Here are some more pictures. Pardon the dirty fingers--early morning gardening tasks. The chips are so small that even with a good camera, it's hard to get a clear image. At any rate, one of the chips has this identifying sequence: winbond 25032JVSIQ2017. That's the one with 8 pins, and I was able to follow that ID back to this website: https://www.winbond.com/hq/?__locale=en....very interesting stuff. Whoever suggested that the smaller chip is some sort of switch, I have a feeling you're right. It has two...I don't know what you'd call that...copper leads, inputs...and one output. The 8-pin chip looks like onboard ram for embedded devices....has anybody worked with this stuff? How would you ever solder any of this? I have helping hands and soldering kit with multiple fittings, but this is so tiny, and yet so interesting. I don't know...I only started learning this programming stuff because of the pandemic, and I very much like it.
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chip_a.jpg (35.52 KiB) Viewed 1419 times
chiod.jpg
chiod.jpg (30.43 KiB) Viewed 1419 times

razzjazz192
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Re: Help identifying tiny chip

Fri May 14, 2021 1:18 pm

Image
Attachments
chopc.jpg
chopc.jpg (42.15 KiB) Viewed 1416 times
chipf.jpg
chipf.jpg (24.04 KiB) Viewed 1416 times
chipe.jpg
chipe.jpg (28.09 KiB) Viewed 1416 times

LTolledo
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Re: Help identifying tiny chip

Fri May 14, 2021 8:59 pm

as mentioned in my previous post, due to the size of the image (for the "small chip") I'd still call it a U.S.T.

better drop sparkfun a mail and ask them personally what they actually sent you.
they should know better than anyone here in the forum
because the items came from sparkfun.

if they dont know what its is either... better demand that they accept a return of that batch of items sparkfun sent you.

use of U.S.T. on your project might be detrimental...
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Come to me with 'problems' and I'll help you find solutions"

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Gavinmc42
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Re: Help identifying tiny chip

Fri May 14, 2021 11:44 pm

Seems to have a a clear top, could be a light sensor.
Only three pads so opto transistor or analog output.

Bingo
https://www.sparkfun.com/products/8688
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jojopi
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Re: Help identifying tiny chip

Sat May 15, 2021 1:55 am

razzjazz192 wrote:
Fri May 14, 2021 1:17 pm
How would you ever solder any of this?
They are intended for reflow soldering. You would have a PCB with matching pad layouts, apply solder paste to the PCB pads using a stencil, place the parts on top, then heat the whole part, or the whole board. Each glob of paste melts into a ball of solder, and the surface tension should correct for any slight misalignments.

If the pads are restricted to the edges of the part, then it is just about possible to heat them with an iron and feed solder underneath by capillary action. Again you would need a good quality PCB with the correct footprints.

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mahjongg
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Re: Help identifying tiny chip

Sat May 15, 2021 2:09 pm

My educated guess is that it is a dual LED, with two anodes and one cathode, probably a red and a green LED in one package. the shape of the copper at the one contact side suggests that side is the Cathode.

try with a multimeter in the "diode" setting, to see if you can light up the leds.

There is no text readable on the eight-pin SO chip, perhaps if you shine light on it from an angle you can read what is laser printed on it with a magnifying glass.

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Re: Help identifying tiny chip

Sat May 15, 2021 2:19 pm

mahjongg wrote:
Sat May 15, 2021 2:09 pm
My educated guess is that it is a dual LED, with two anodes and one cathode, probably a red and a green LED in one package. the shape of the copper at the one contact side suggests that side is the Cathode.

try with a multimeter in the "diode" setting, to see if you can light up the leds.

Gavinmc42 has identified it https://www.sparkfun.com/products/8688

basically a transistor with a clear top to detect light https://www.vishay.com/docs/81579/temt6000.pdf

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rpdom
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Re: Help identifying tiny chip

Sat May 15, 2021 3:36 pm

gordon77 wrote:
Sat May 15, 2021 2:19 pm
basically a transistor with a clear top to detect light https://www.vishay.com/docs/81579/temt6000.pdf
That brings back memories of scratching the paint off an OC71 to turn it into an OCP71 :-)
Unreadable squiggle

pidd
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Re: Help identifying tiny chip

Sat May 15, 2021 3:51 pm

rpdom wrote:
Sat May 15, 2021 3:36 pm
gordon77 wrote:
Sat May 15, 2021 2:19 pm
basically a transistor with a clear top to detect light https://www.vishay.com/docs/81579/temt6000.pdf
That brings back memories of scratching the paint off an OC71 to turn it into an OCP71 :-)
OCP71's are cheaper than OC71's these days so the process might be getting reversed.

gordon77
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Re: Help identifying tiny chip

Sat May 15, 2021 4:03 pm

rpdom wrote:
Sat May 15, 2021 3:36 pm
gordon77 wrote:
Sat May 15, 2021 2:19 pm
basically a transistor with a clear top to detect light https://www.vishay.com/docs/81579/temt6000.pdf
That brings back memories of scratching the paint off an OC71 to turn it into an OCP71 :-)
That's what l was thinking of.. :D

drgeoff
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Re: Help identifying tiny chip

Sat May 15, 2021 4:11 pm

rpdom wrote:
Sat May 15, 2021 3:36 pm
gordon77 wrote:
Sat May 15, 2021 2:19 pm
basically a transistor with a clear top to detect light https://www.vishay.com/docs/81579/temt6000.pdf
That brings back memories of scratching the paint off an OC71 to turn it into an OCP71 :-)
I recall using a centrifuge in the school chemistry lab to move the goo around the germanium to the bottom of the glass envelope.

Also ISTR the RRP of an OC71 was 6 shillings and six pence whereas an OCP71 was in the region of four times that. Mid 1960s.
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Heater
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Re: Help identifying tiny chip

Sat May 15, 2021 4:19 pm

rpdom wrote:
Sat May 15, 2021 3:36 pm
That brings back memories of scratching the paint off an OC71 to turn it into an OCP71 :-)
Oh boy. That brings back memories.
Memory in C++ is a leaky abstraction .

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Re: Help identifying tiny chip

Sat May 15, 2021 4:27 pm

razzjazz192 wrote:
Fri May 14, 2021 1:17 pm
winbond 25032JVSIQ2017
The 8-pin chip looks like onboard ram for embedded devices....has anybody worked with this stuff?
Yes: there's one quite like it on the Raspberry Pi Pico. They're pretty common on embedded boards: ESP8266 / ESP32 / STM32 / SAMD boards I use with MicroPython mostly use them. But they're most commonly known as BIOS chips, because so many PCs use Winbond 25Q32BVSIG to store their BIOS code.

They're Flash, though, not RAM. While I think you can access them like the simple older Microchip 8-pin SPI memory chips like the SST25 Flash and 23LC SRAM chips, they typically use Quad-SPI for higher speed. QSPI uses four data lines in parallel instead of just one in traditional SPI.
How would you ever solder any of this?
With extreme care :-) The light sensor is way too small for my old eyes. I can just manage SOT323 and SOIC, but I don't particularly enjoy it. There are SMD to DIP adapter boards which make things easier. The cheap SMD-DIP boards still require care, but there are really expensive ones that have individual tinned slots for each lead that help hold the part in place.
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Gavinmc42
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Re: Help identifying tiny chip

Sat May 15, 2021 11:09 pm

With extreme care :-) The light sensor is way too small for my old eyes.
Not the smallest light sensor I have used..
Stereo microscope and extra lighting.
Done a few parts that needed max magnification.
Glue them deadbug and solder tiny wires to the bottom, now top pads.
6 hours for one part once.

Galden and a $9 stock pot on a heater, DIY vapour phase reflow.
90% did not solder properly, but I just needed 2 for prototyping.
Next time solder mask PCBs, not bare copper ;)
But it was a few hours and not days over a microscope.

Not sure how much longer I can work in this industry, parts are getting too small.
Lucky we have breakout PCB guys like Adafruit, Sparkfun and many more.
But sometimes smaller breakout boards are needed, then it becomes DIY.
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HawaiianPi
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Re: Help identifying tiny chip

Sun May 16, 2021 12:34 am

To me those look like parts that fell off of something, and those two larger pieces look like short strips from a parts reel used in automated manufacturing (those types of parts are not designed for hand soldering).

Image

Did you order bulk parts (as opposed to a functional circuit board or breakoout board)?
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Re: Help identifying tiny chip

Sun May 16, 2021 2:19 am

what all was in this order?

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