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16K-bit UV EPROM
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- čas přidán 16. 03. 2024
- Link to the It's Pronounced "EPROM" T-shirt and other stuff:
evilmonkeyzdesignz.threadless...
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#ComponentsCloseUp Number 259
Manufacturer: Eurotechnique
Part Number: ET2716Q-1
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The “E” logo on the part is for Eurotechinque, a company “founded in 1979 in Rousset, Bouches-du-Rhône as a joint-venture between Saint-Gobain of France and US-based National Semiconductor” - from the Wikipedia page on STMicroelectronics.
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This part is a 16K-bit (16,384) EPROM (Erasable Programmable Read-Only Memory) device that is able to be erased with UV light. The EPROM can be programmed electrically and erased multiple times, allowing for one device to be used for testing code before deploying it onto chips that can’t be erased, like PROMs.
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To erase the contents stored on the EPROM, an ultraviolet source of 2537Å can be used with the window exposed. This will erase the chip completely within about 15-20 minutes, according to the datasheet. If the window is not covered, the contents can slowly be corrupted and erased, due to UV light from the sun or other sources. This will usually take days or weeks to complete.
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This chip is interesting because something had caught my eye in one of the corners when I was looking at it under the microscope. To me it looks like it could possibly be a butterfly, or perhaps a pair of scissors. rareLEDs over on Instagram had opened up a different EPROM, the the NM27C32G from National Semiconductor, which put all the pieces of the puzzle together.
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On the NM27C32G is a silicon doodle of a wrist with a hand. One of the fingers has a bow tied on it, and there is a watch on the wrist with what looks like a national semi logo. Since Eurotechinque has some ties to National Semiconductor, it makes sense that they would share designs. This design probably used portions of the NM27C32G, but the other parts of the doodle were on different layers, or removed from this design entirely.
My guess: Tying a piece of string on your finger was once a way of remembering things, so here it symbolises memory. The invisible hand symbolises erasable memory perhaps?
That's a super solid guess. I like it! 👍🏼
I wonder if the hand was printed with UV reactive ink that turned invisible when the erase function was used to prevent reselling the chip as new.
Thanks, I forgot that fact
Maybe the designer got married?
@@DonariaRegiathat would make so much sense. These have limited number of uses right?
PROM ---> EPROM
Erasable Programable Read Only Memory.
EEPROM (Electrically Erasable) became the Flash Erasable EPROM (FLASH) because erasing took too long as bit by bit erasing. My career started in 1980 at Texas Instruments in the MOS Memory division based then in Houston, TX.
"Bro thats so frickin rad dude!"
I supose I should of put the much needed, Holy sh"! TEXAS INSTRUMENTS! Audio so kinda really dig TI and you working there since the year that i was born nearly is really rock and roll man, people are going to say that it isn't, and i can 💯 say that they're fos and don't know wtta🤭! but joking aside.. its an honour and "yeh thats rock and roll man", right on."
A key difference between EPROM and EEROM is that EPROM had to be removed from the circuit board in order to be erased. With EEROM, the chip did not need to be removed from the board.
If the product is in a case and it is sealed shut, that means opening up the product and removing the EPROM chip and placing into a UV eraser.
Are you saying that the inconvenience of this did not play a part?
I used to think of it the other way around: Nobody designed circuit boards that allowed to program EPROMs in place, because they had to be removed for erasing anyway.
(Unless you'd also build in the UV light. That would be an interesting concept, but I've never heard of any such thing.)
These were used in my early fuel injection systems which made tuning interesting, we used to set them out in the sun to erase them
what vehicles? i love to hear about this older car computer stuff
@@brentbarham3157 mostly gm stuff fthat used the Bosch ecms like lt1, tpi, and tbi, the efi is so simple
Hmmn for how long you kept it under sun light?
@@sarmedhlaa7698 3-6 hours then do a read check to make sure there’s no data left
So that's why there's a window made of quartz...bc uv light erases the memory and glass is opaque to uv light!
I used to "burn" eproms back in the day. Built my own programmer. Thanks for the memories.
I remember burning these 1000's of times back in the day
Thanks for the MEMORIES. Nice.
The 2716 stores 16384 bits of memory. These bits are arranged as 8-bit words, or sometimes called a byte. This produces 2048 bytes of memory. I used the 2716, 2732, 2764 and 27128 on Intel single board computers that used the 8085A. Yes, I am old.
sometimes called a byte ?...16384=16 K I remember this on my ZX spectrum, yes I am old too. Z80A assembler fun....
In the 90's and 2000's, I was a Photolithography Engineer in Dallas and I help make parts like this. I am also now old.
Y’all are geniuses. No joke. Omg this stuff blows my mind, and the comment section too especially
There is, or was, a little 'caricature' on the LP5523 die, to commemorate my part in the design; i specified, and co-designed, the device for "the customer"
BTW, if you ever need an LED driver that lets your CPU "sleep" a lot, the LP5521 and LP5523 have small programmable processors, plus linear/log conversion, temperature compensation, automatic 1.5x charge pump, I2C, interrupt, a "GPIO pin"...
I wish I was smart enough to know what any of this meant 😅
genuinely curious, how did you learn this
Now I wanna go listen to some EPROM. Sick EDM Dj, for all those sleeping on it.
I was looking for an EPROM fan in here somewhere 😂
Heck yeah! Not the only one!
It''s cool to check out the chip structures
But also to see these chip tested to see how well time has been kind.
PTSD Flash back to the early 90's where I programmed and erased a dozen of these in round robin fashion while developing code for a bidet.
Sounds shitty .
i think its just super neat that they give you a little window to look at the tech
I remember programming those manually with a BIOS programmer or EPROM back in the days to get a 486x cpu to go faster than advertised...
Can u elaborate this? I appreciate it if u could
PDP-11
Wonder if the finger knot is meant to represent the chip not forgetting
If I remember right .... We used to write the code for this in "machine code" ... before we would burn it to the prom. That was always a kick. Seeing your programming in action after the chip was burned. This would have been in the early '90s late '80s. 👨🏼💻
It would have been very unusual to write anything in raw machine code in the 90's, much more likely assembler or even C.
@@ferrumignis, no, it was in machine code. There's only 2k bytes on this device. The code (written in assembler usually, but installed in machine language) was debugged in RAM and then the EPROM was written and checked for accuracy. Another use was for look-up tables. A quicker hardware multiply/divide look-up table could be made from two 2764's(8kx8) using the address rows and columns for (multiplication) inputs, than a shift left 16 times routine be executed. Same technique used for trig, log and special function look-ups. Good times! :-)
I feel dumb, as I have a bunch of old EPROM in my parts bins, and didn't know what it was. The window is cool, so I kept them.
I used to write and "program" on these eprom for my work - SCADA systems. Yep downloading 8085 bin files onto Softy programmers.
Someone I was working for was still using these in new machines. One of them wouldn't program so they threw it out. I took it home with me and through the window you can clearly see one of the bond wires melted.
I used a lot of 2716s when working with RCA 1802 microprocessors in the 1980s. They were like the floppy disk of microprocessor systems -- portable and non-volatile.
Before the E in EPROM was available we had PROMs in which the fusible links were actually burned or fuses blown. It would be interesting to see the blown vs the unblown fuses in one of these classic devices.
I remember creating a 68000 computer using this type of EPROM in my EE senior design class in the mid 90s.
Eprom’s are badass, used to program them in school, just remove the tape on top we had and poof! Start over
I have no clue what you are saying or what it is but its fascinating. Im at the edge of my seat. Love it. ❤❤❤❤❤❤❤
Yesss!! Keep em coming!! ❤
We used to have PROMs, they lasted FOREVER, now we have EPROMS, NVRAMs, and FLASH that lose their memory.
And before that there was real ROMs that could not forget at all .
Looks very similar to the chip in a GM throttle body injection computer. Heard stories of ppl setting those chips in the sun for a set amount of time to erase the data and prepare them for a new tune lol so awesome. I disected one once and was amazed at the window under the sticker lol
Thats cool, I remember erasing them in bulk and then uploading them at Rockwell Automation for the 1771 ASD
You literally shine a UV light into that window and it erases the memory. So neat.
Amazing how much detail is in something so small
Respect for you job brother. Thanks for your information
Hitchhiker’s guide to the galaxy
I used to flash the 2732 ePROM's for Buick guys . We used them in the Turbo v6 Grand Nationals.
always write twice and verify. !
I had a 386 with several of these chips on the mainboard from Harris the people who made the Hubble along with several other interesting chips.
Ohhh my coworker was telling me about these, someone comment back so I remember to show him the clip!
Do it
@biggieb8900 I did it, he liked it
wow,im amazed at what can go into such a small part....
You've been living under a blanket ? It's way more now .. 2716 eprom was very common.
Technically it's 2Kx8, the data bus is 8 bits. Most likely the finger knot suggests that the chip remembers things.
Thats really clever... you tie a string around your finger when you've forgotten something, otherwise it's just a string...
Thats cool. I like it
I still run a CNC-machine which contains a bunch of such 16kBit-Eproms. Oh, I'm a bit oldish...
Used to use this in data loggers for pressure transducers
Extra terrestrial
Oh and thank you for that one
I’m a computer engineering student and I love your videos. For someone who knows more about IC packaging than me, how common are windows like this in IC’s? I haven’t seen one like this in a while, if ever
The windowed packaged were only used in devices with UV erasable EPROM memory. Dedicated microprocessors don't have UV erasable EPROM memory, so they don't have windows. You would see them in microcontrollers, which combine a microprocessor, RAM and EPROM on the same die, but they usually had limited RAM and ROM for embedded applications.
I've got a collection a bunch of different parts with windows on them. I like them because of how unique they are. I don't think very common for new designs to have windows, if anyone is still doing it at all, given how easy it is to electrically program and erase chips. One chip that I have that that @beefchicken didn't mention is an Altera EP1810GC EPLD, a PLD with a UV EPROM inside it. They are pretty cool looking, to say the least.
@@EvilmonkeyzDesignz Super awesome. Thanks to @Beefchicken too!
I figured it was something to do with operation of the IC itself but also we’re so far past this tech like you mention I’ve never been taught about it haha. To me though, the 70’s through 80’s had to have been the coolest time to be a EE/CPEG.. Part of why I love your videos. Chip art is (mostly) a relic of the past and obviously nothing is done by hand anymore. One of my professors brought in and demoed some early 70’s magnetic-core memory that was completely handmade down to the traces on the PCB clearly being hand drawn. At my university for capstone, we get to take a lab and fab a 5,000 transistor IC to play our schools’ fight song, with mid 80’s cutting edge machines. Looking more forward to that than industry haha
@@beefchicken Ahhh! Makes sense. Thank you for this. Very interesting packaging, I’ve never seen a window like that!
Never come across it in any of my textbooks either- guessing around 1970’s & before EEPROM/flash memory? I’d assume not all came windowed
@@Laminar-Flow UV-erasable means "erasable using ultraviolet light". You literally had to shine a light directly on the chip to erase it. The window was _required_ for this purpose. Many EPROMs that were written and intended not to be erased again had a sticker placed over the window in order to prevent accidental erasure, as even simple sunlight has enough UV to affect the stability of the stored data.
I cant believe this is considered antiquated tech now. How tf could it get any smaller!!
This is just 2 kilobytes of memory, nowadays micro SD cards contain a chip half this size that's capable of holding two TERAbytes of memory. Pretty amazing how far technology has come in just a few decades.
NICE SILICON FROM 70 80S 😊
used in older gm engine control units. pre flash memory updates to theor delco pcms
Amazing
Мне очень нравится ваш канал, очень интересный!!!!
I had to learn to use eproms in 1994 and it was not an easy thing to work with
They were a heck of lot easier to work with than one time programmable ones, where you physically destroy fuses to literally burn in your program. You think long and hard about software changes when you have to throw out the memory chips with each change rather than just wait for the lamp to erase them.
I used to work for Maxim Integrated and one of our parts had a putting green on it in one corner. I don't remember what part it was, but I think that it was a Bi-polar part.
Are these what you map out a tune on the older obd1 ecus
It's funny that the actual chip is so tiny compared to the casing.
Nice
So how would you pronounce words like ethernet, etaxi and ecommerce?
Does the hand show up when exposed to UV?
Very popular EPROM...
I use to flash and program those for telecommunication protocols ISDN qsig dass etc
So if you shine a UV light through the window, will it erase the memory?
I kinda wish they still did this with chips. I wonder if it would work for a bios chip so if you brick it while upgrading the firmware you can just easily erase it and start over
Is that a capsule Corp. logo?
For atari games!
Not to be confused with an EEPROM
I want the quartz window.
I still want it 2 months later.
I've never actually seen an EPROM. So, that window is where you'd expose it to light to reset the memory on the chip?
Only familiar with EEPROM lol
I think the chips that read only would have the hand. That means you can’t write to it and so it never forgets? If no hand erasable I’d be interested in what the other chips have. So if has
We don't use uv eprom anymore (at least ordinary people), we use sd, mmc, and so, I'm really curious what inside 1tb inside
engenheiros são crianças que gostam de desenhar na parede... não tenho mais dúvidas rs
so they didn’t forget to add the magic smoke
I’m betting it shows the hand in some spectrum that doesn’t erase the eprom
what layer was the hand supposed ot be on? did they forget it? lol
I thought there was a difference between eprom and eeprom?
The former is erasable by UV light, the latter by applying an overvoltage. (un-ironic. Of course you can "erase" any programmable device by applying destructive over-voltage.)
Hi. I did not get where to order that tee
why did it say DDR during your first zoom?
Завжди мріяв гланутм на геї через мікроскоп :)
I think if there is some sort of loan forgiveness program it should be interest forgiveness, but not the principle
looks like the eprom on my kaypro board
They used these in nes games😊
OC Omni-Corp is that you?
I think that using dental floss or so other hi strength line to cut the adhesive.
You've given me an idea I'll have to try out. thanks!
Real "Windows" ...😊
100% pronounced the way you think it should be. EEPROM is the other pronunciation, electronically erasable programmable read only memory a.k.a. flash.
run a similar part n my hondas ECUs. quartz window and all.
I wonder if they lifted one of the mask layers and that's why they only have some of the hand? Sort of a copyright proof by doodle.
Have another look when the UV light is on...
Tshirt was funny
You NEED microscoping UV Erasable ROM... ERASING! An asked from Brazil. 😊
I agree that it should be pronounced "EPROM"
These iFixit videos are getting little extreme 😂
EPROM!
That’s them. I’ve got a small boxful of them.
Thank you.
brass knuckles?
No, the world has the pronunciation correct with the long E.
EEEEEE-PROM
Did you try a UV light...maybe you discovered something
Wow 😂
I agree it should definitely be pronounced EPROM, not EPROM.
It's obvious!
What's the point of the window?
It's used to erase the data on the chip with UV light so that it can be programmed again. This was before they created EEPROMs, or Electrically Erasable Programmable Read Only Memory devices.
I renege those and programming them
Knot just means memory
Why pronounce it ehprom? Erasable is with an ee, right? On the other hand, EEPROM would be eheeprom. And modem should be pronounced mohdeem (modulator/demodulator).
How how
You broke it
Yea I think these should be called ehp-roms otherwise it's the same as EEPROMs.