I know that they are pin for pin, and I know that they are both opamps. Reading the data sheets, it seems that they are (at least to a good first approximation) equivalents.
Is there a good reason why I can't put them in the same parts bin?
Jim
--
"It is the mark of an educated mind to be able to entertain a thought
without accepting it."
--Aristotle
ISTR that MC34084s have higher input capacitance and a much wider output swing than the TL084.
Cheers,
Phil Hobbs
Well, seeing that ON Semi discontinued all their JFET opamps some time ago, you could just relabel that drawer for TI's part.
When I used them extensively in the early '80's I did presume "sameness".
...Jim Thompson
-- | James E.Thompson, P.E. | mens | | Analog Innovations, Inc. | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | Phoenix, Arizona 85048 Skype: Contacts Only | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at
Yes - they have different part numbers. ;-)
Have Fun! Rich
I often see the MC34084 used in industrial control circuitry where the power supply rails are +/-20 or +/-22 V.
The TL084 is I think only rated up to +/-18V.
There is a motorola chip like the LM358 that handles the bigger power supply voltages too.
Tim.
They're still listing several.
Cheers,
Phil Hobbs
"RST Engineering (jw)"
** The MC part has several times more BW, SR and input voltage noise. ** They are not equivalents.What YOU put in YOUR bins is a private matter.
.... Phil
Why would I do that? The drawer (bin, actually) is labeled 1-7114-0084; the only thing I'd have to do is add the TL084 and the various folks who make it to the approved vendor list for that part number.
Jim
st
??? All I see is the mc34074, etc. all bipolar parts.
Quite right, sorry--the blurbs say "without the use of JFET inputs". :(
Cheers,
Phil Hobbs
I use the MC33172 as an HV LM358, often in versions of the same board running from different supplies. Interchangeable in my apps.
The way I learned it, suitable subs are OK, as long as they don't change form, fit, or function.
Yes, I know I said, "Because they have different part numbers", but if you have house numbers, you can put anything you want to in the bin, as long as the customers are happy. :-)
Cheers! Rich
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