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[Moved]: OTP programming / OTP

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CAMALEAO

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Hi all,

I came across with a device called otp. I have a rough idea what it is after the research I did however there isn't much info around the web.

Does anyone have it can point to a document that explains in more detail this device?
 

Re: OTP programming / OTP

Any device that can be only programmed once, e.g. an EPROM or EPROM based processor without quartz window for erasure. Can be found rarely these days because EPROM has been mostly replaced by flash memory.

Generally a nonvolatile feature that can be only programmed once, either due to technological limitations or intentionally, e.g. for security reasons.
 

CAMALEAO said:
Does anyone ... can point to a document that explains in more detail this device?
Click to expand...

Here are a few papers:

EPROM OTP , s. page 9. Until now, this is the most used OTP technology. Actually this is a electrically, in principle re-programmable non-volatile memory. For re-programming, these memory chips must first be erased by UV radiation, that's why real EPROMs (not OTPs) have ceramic packages with UV transparent windows. OTPs can be programmed (electrically) like EPROMs, but they are packaged in plastic packages (without such a window, of course) and so can't be erased. Plastic packages are a lot cheaper than ceramic packages with UV window.

Here are some more OTP technologies.

There are even FLASH technology OTPs: FLASH memories actually are re-programmable, too, but these have a bug concerning their (electrical) erasing mechanism and so shouldn't be erased, hence they're marked and sold as OTPs.
 

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