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Old 29th December 2013, 01:09 AM   #1
Hayden is offline Hayden  Australia
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Default JRC 4580 semiconductor

Does anyone know where I could get this IC from? as this one is faulty.
What is the J086G number? is it relevant?
Also are these all the same? what does the letter indicate?
4580
4580M
4580D

Any suggestions would be greatly appreciated as it may get my expensive amplifier going again

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Last edited by Hayden; 29th December 2013 at 01:22 AM.
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Old 29th December 2013, 01:59 AM   #2
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njm4580m
http://akizukidenshi.com/download/NJM4580.pdf



buy
http://octopart.com/partsearch#!?q=n...art=0&limit=10
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Old 29th December 2013, 02:12 AM   #3
Hayden is offline Hayden  Australia
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Thank you so much
I think I've worked out that the letter is the shape if the IC
So do you believe it is an M and not an E shape? as they look fairly similar on the datasheet or doesn't it matter? it just looks like it's the height that is different and the pins could be the same???
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Old 29th December 2013, 02:28 AM   #4
eyoung is offline eyoung  United States
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ck this out...

Package Dimensions | IC Package | Semiconductor Selection Guides | New Japan Radio(New JRC)


regards,E
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Old 29th December 2013, 02:56 AM   #5
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Since you are in Australia, give Element 14 a try.
I think you'll find it's an SOIC8 package.

Manufacturer:TEXAS INSTRUMENTS Manufacturer Part No:RC4580ID. Order Code: 1857994 Trade Price: 1 - 24 $1.41

It's also known as NJM4580.

Last edited by Bibliophile; 29th December 2013 at 03:15 AM. Reason: Additional info
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Old 29th December 2013, 09:48 AM   #6
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Location: West Australia, straight over the road from the beach, natural ambient sounds only.
Just about any junked DVD player will have them....for free.

Dan.
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Old 29th December 2013, 10:15 AM   #7
Mooly is offline Mooly  United Kingdom
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Pretty rare for an opamp to fail...

You could hardwire just about any dual opamp in its place as a test, 5532, 4558, TL072, TL082 etc
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Old 29th December 2013, 11:46 AM   #8
JMFahey is offline JMFahey  Argentina
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Agree.
Why do you think it's bad?
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Old 31st December 2013, 01:12 PM   #9
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Quote:
Originally Posted by Max Headroom View Post
Just about any junked DVD player will have them....for free.

Dan.
I agree now is the only way to have the components
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Old 2nd January 2014, 01:52 AM   #10
Hayden is offline Hayden  Australia
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Thanks guys so much!!
It's the only component that reacts to freezing spray.
If I put the hipass or lowpass filter on it has static crackling in the music but when I hit it direct with freeze spray the crackles go away, spraying other components have no effect. Also I did flux and re-solder it in case it was a dry joint but that didn't change anything.

This is what arrived today. The original chip has a dot to match up on the board to mark which way it goes so is it safe to match the line on the new chip with the mark on the board???


It says on the chip:

R4580I
29k
AS7DG4

Hope it works

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