Maker Pro
Maker Pro

What kind of IC is this?

tj107us

Apr 23, 2011
48
Joined
Apr 23, 2011
Messages
48
I was cleaning up in my electronics lab today and found this IC. Does anyone know what it is? I tried Googling it but no results. Looks like some early processor for a computer but im not sure!!


Jake
 

Attachments

  • 100_5312.jpg
    100_5312.jpg
    150.6 KB · Views: 140

john monks

Mar 9, 2012
693
Joined
Mar 9, 2012
Messages
693
This looks like an EPROM.
Pull the tape off and you probably see some numbers under in.
Take a look at the underside.
 

tj107us

Apr 23, 2011
48
Joined
Apr 23, 2011
Messages
48
here is some more pics.
 

Attachments

  • _MG_2629.jpg
    _MG_2629.jpg
    151.3 KB · Views: 162
  • _MG_2630.jpg
    _MG_2630.jpg
    149.2 KB · Views: 143

(*steve*)

¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd
Moderator
Jan 21, 2010
25,505
Joined
Jan 21, 2010
Messages
25,505
It's an eprom. Under that sticker you'll find a quartz window through which you can see the chip itself. UV light will erase the data stored on it so it can be re-written.

It may be something like 4k x 8 bits or something similar.

The actual part number is not visible, so I can't tell. The number of legs narrows it down a bit though.

edit: it's a 2716 (2k x 8)
 
Last edited:

tj107us

Apr 23, 2011
48
Joined
Apr 23, 2011
Messages
48
so holding it up to a fluoresecent light will erase it? is that the reason for the sticker over the window?
 

(*steve*)

¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd
Moderator
Jan 21, 2010
25,505
Joined
Jan 21, 2010
Messages
25,505
I think a normal Fluro will erase it in about 10 years.

Bright sunlight, in several hours, the correct UV source, a couple of minutes.

Google should tell you.
 

Jotto

Aug 24, 2012
120
Joined
Aug 24, 2012
Messages
120
That is a very old one, newer ones will also have speed on them now. Just use a ultra violet lamp and erase for about 10-30 minutes. Not worth a lot at the moment, but I think in a few years they will increase in price. Most are just manufacturing one shot eeproms now. I have thousands of these up to 8meg. You will need a burner that can verify if the chip is good or bad with zero sum check.
 

(*steve*)

¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd
Moderator
Jan 21, 2010
25,505
Joined
Jan 21, 2010
Messages
25,505
What can you program on them

Any combination of 2048 bytes.

They don't do anything except store data. And by today's standards, not a lot of that.
 

(*steve*)

¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd
Moderator
Jan 21, 2010
25,505
Joined
Jan 21, 2010
Messages
25,505
They store data. 2K was once a relatively large amount of data.
 

tj107us

Apr 23, 2011
48
Joined
Apr 23, 2011
Messages
48
i wrote 4 letters(abcd) in notepad and saved it, and that was 2kb. What kind of data is only 4 letters that can be stored on the EPROM? Or does notepad take X amount of data to tell what the file is?
 

amidis86

Jul 17, 2012
47
Joined
Jul 17, 2012
Messages
47
i wrote 4 letters(abcd) in notepad and saved it, and that was 2kb. What kind of data is only 4 letters that can be stored on the EPROM? Or does notepad take X amount of data to tell what the file is?

it should bin file that size 2kb. You can try willem programmer software to look what inside 2kb file that can burn into 2716. The address will start 00000000 to 000007f0. And it use hex code not abcd. same like 27c256 - 32kb used in honda obd1 ecu to control ecu
 
Last edited:

tj107us

Apr 23, 2011
48
Joined
Apr 23, 2011
Messages
48
hey i went back one the notepad, it does take a lot data to make 2kb.
 

(*steve*)

¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd
Moderator
Jan 21, 2010
25,505
Joined
Jan 21, 2010
Messages
25,505
The minimum size file on disk for your computer may be 2k. The actual data is 4 bytes (or maybe up to 20(ish) if you're using a multi-byte file format)
 
Top