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kudukdweller9
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Join Date: Jan 2009
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NE5554U Data Sheet

10/14/2009 1:03 AM

Does anyone have application data on this Adjustable Dual Tracking Voltage Regulator ?

I have googled the heck out of it and got nothing but relatives without application notes.

NE5554U

Pins 1 and 9 + & - inputs, 5 is common, 2 and 8 are outputs, 3 and 7 are no connection and 4 and 6 are balance and adjust (I don't know which is which).

I saw the the spec sheet years ago and it shows the range of resistors for setting it up with +20 & -20 Volts input and the range of divider resistors desired output and the range of divider resistors for tracking.

I have a fistful of these.

Jon
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indel
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Engineering Fields - Electrical Engineering - New Member

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#1

Re: Can't find an NE5554U data sheet.

10/14/2009 9:01 AM

Have you tried this?

NE5554*

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kudukdweller9
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#2
In reply to #1

Re: Can't find an NE5554U data sheet.

10/14/2009 1:03 PM

Indel,

Thanks much that helps a lot.

The Signetics Mullard file is good.

The one I want has a range of resistance values. Google has not served well for that.

Jon
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indel
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#3
In reply to #2

Re: Can't find an NE5554U data sheet.

10/15/2009 7:17 AM
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indel
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#7
In reply to #3

Re: Can't find an NE5554U data sheet.

10/18/2009 7:02 PM

???

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Sciesis2
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Location: Vancouver (not BC) Washington (not DC) US of A
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#4

Re: NE5554U Data Sheet

10/17/2009 3:33 PM

Noting the date code on your sample... 1978? They been around for a while. The NE prefix leads me to believe a Signetics part (maybe) but Signetics no longer exists. I don't know what happened to them.

You might try LM5554. This would be a National part number (if they also manufactured it).

Bill
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kudukdweller9
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#5
In reply to #4

Re: NE5554U Data Sheet

10/17/2009 5:36 PM

Sciesis2,

Yep. pretty old.

Signetics, yes.

No LM5554 data found.

The Signetics NE5554U is unique.

I found info in an unusual place.

Jon
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kudukdweller9
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#6
In reply to #4

Re: NE5554U Data Sheet

10/17/2009 8:48 PM

Sciesis2,

After a long detailed search I found the Signetics NE5554U in a High Voltage Foldback Power Supply patent used for electrostatic coating application.
The info was included in the text of US Patent 4485427 by Fred W Woodruff and Daniel C Hughey.
It gave me the pin-outs for the unique U type 9 pin SIL package.
I am now a happy camper as I am able to use these ICs for projects.
I used a couple of 10kΩ pots for the adjustments and they work great. I can get the divider values from them and put in selected fixed resistors for R1 and R2, R3 and R4.
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