Maker Pro
Maker Pro

REQ: LM327 14 pin DIL Datasheet

T

tommiy

Jan 1, 1970
0
I've been looking for a week now and it appears there isn't such a beast on
the net. I've tried all the normal suspect places but it appears that this
doesn't exist...yet I have one on a CPU board manufactured about 20 yrs
ago....

Can anyone help out?
 
G

Graham W

Jan 1, 1970
0
tommiy said:
I've been looking for a week now and it appears there isn't such a beast on
the net. I've tried all the normal suspect places but it appears that this
doesn't exist...yet I have one on a CPU board manufactured about 20 yrs
ago....

It's a dual polarity tracking voltage regulator @ up to 100mA.
It was produced in two forms of 14 pin DIL and a 10 lead round
TO-5H metal can. Of the 14 pin varieties, one is a 'power' package
and has a metal strap running across the package from pin 1/14
end to 7/8 end. The pinouts are different in both cases.

It has some close cousins - LM325 +/- 15 V and LM326 +/- 12V.
National Semis made them in the 225 etc. and 125 etc. ratings.

However, the 327 (227, 127) are +/- 5Vdc regulators with current
limit and line/load regulation of 0.06%.

HTH
 
T

tommiy

Jan 1, 1970
0
Thanks Graham,
Don't suppose you know where a data sheet is for the thing do you?
Appears NS doesn't even acknowledge they existed anymore ;)
 
G

Graham W

Jan 1, 1970
0
tommiy wrote:
Thanks Graham,
Don't suppose you know where a data sheet is for the thing do you?
Appears NS doesn't even acknowledge they existed anymore ;)

They are on page 1-41 of the 1976 Linear devices handbook.

What did you want to know about them? Be sure to identify which type
of 14 pin package you have.
 
T

tommiy

Jan 1, 1970
0
Graham,
After the datasheet for it. Tried checking almost every online source
for this and it appears its a big hole....if you check nat semi none of the
family is even listed anymore. I found an incomplete set for a lm325 but its
missing the Icl curves etc.

If you could scan them or know somewhere online to get it it would be
appreciated.

Interesting I have an 1980 linear book an AN book and its not in either of
these....must have gone obsolete between 76 and 80 ;(
 
G

Graham W

Jan 1, 1970
0
Graham,
After the datasheet for it.

You said that before...
Tried checking almost every online source
for this and it appears its a big hole....if you check nat semi none of the
family is even listed anymore.

You said that before too...
I found an incomplete set for a lm325 but its
missing the Icl curves etc.

What is that 'Icl' in words?

Are you designing with this thing? I thought it was a repair job.

Why can't you replace it with a 78L05 3 terminal regulator and its
negative counterpart?
If you could scan them or know somewhere online to get it it would be
appreciated.

No, I'm not getting drawn into that again! It took me most of a
morning to scan and process a smaller data sheet for someone
else because of the crappy print in the book (why do they use tiny
print on rubbish paper) and that produced a multimegabyte PDF
file which took half the afternoon to upload!
Interesting I have an 1980 linear book an AN book and its not in either of
these....must have gone obsolete between 76 and 80 ;(

Well the following datasheet says it is for future products so the
writing was on the wall, be it though that it was wrong wall!

Now, you failed to mention which type package you want the info for.
 
L

L. Fiar

Jan 1, 1970
0
tommiy said:
I've been looking for a week now and it appears there isn't such a
beast on the net. I've tried all the normal suspect places but it
appears that this doesn't exist...yet I have one on a CPU board
manufactured about 20 yrs ago....

Can anyone help out?

Hi.

I have it in my old ITT data book.
LM125 Series Dual Tracking Regulators.

Plastic package:
____ ____
+ Boost _| U |_ +sense
| |
NC _| |_ - Current
| | limit
+ Vin _| |_ NC
| |
- Vin _| |_ GND
| |
+ Current _| |_ Reference
limit | |
- sense _| |_ NC
| |
- Vout _| |_ - Boost
|_________|

Metal package:
___
| 0 | GND
+ limit 0 0 Ref
+ sense 0 0 - Boost
+ Boost 0 0 - Vout
+ Vin 0 0 - limit
- Vin 0


General description.
These are dual polarity tracking regulators designed
to provide balanced positive and negative output
voltages at current up to 100mA, the devices are set
for ±15v, ±12v and +5, -12v outputs respectively.
Input voltages up to ±30v can be used and there is
provision for adjustable current limiting.

Absolute Maximum Ratings.
Input voltage: ±30v.
Power dissipation: Internally limited.
Output short circuit duration: Indefinite.
Operating temperature range:
LM125, LM126, LM127: -55º to +125º.
LM325, LM326, LM327: 0º to +70º.
Storage temp range: -65º to +150º.

Features.
Output voltages balanced to within
1% (LM125, LM126, LM127).
Line and load regulation of 0.06%.
Internal thermal overload protection.
Standby current drain of 3mA.
Extremely adjustable current limit.
Internal current limit.
 
T

tommiy

Jan 1, 1970
0
Graham,
I'm not going to even waste my time with you. If you don't want to
assist why add the sarcastic remarks. The request was in the title in the
first place.
 
G

Graham W

Jan 1, 1970
0
Well, there's gratitude for you. I tell the guy that there are two
14 pin dil packs having different pinouts and he thinks I'm being
sarcastic. I volunteer to look up any info he really wants to know and
he thinks I'm a waste of time.

He top posts (like I have just done because I'm fed up with offering
clues that he should post at the bottom) and thinks the world owes
him a solution.
 
F

Franc Zabkar

Jan 1, 1970
0
I've been looking for a week now and it appears there isn't such a beast on
the net. I've tried all the normal suspect places but it appears that this
doesn't exist...yet I have one on a CPU board manufactured about 20 yrs
ago....

Can anyone help out?

Is this similar?
http://cache.national.com/ds/LM/LM325.pdf


- Franc Zabkar
 
Top