Chip sources....

[PenPen]

Ok, I've been putting together a list of parts I need (want) to pick up to try out the circuits I have interest in. I'm having troubles sourcing a few parts. Maybe someone can help.....


LM3886 - I can't find a source that carries this part at all. Is this chip gone? Is there some replacement I can use? I just want something with a decent amount of power for a power amp.

TA7136 - OpAmp in the original DS-1, as per Tonepad. Can't even find a datasheet on this, so I don't know what can replace it. Anyone have any ideas? I'd rather find a direct replacement for this rather than go the dual-OA route Boss did.

MN3101 - Clock driver for the CE-2, as per Tonepad. I know Smallbear carries these, I'm just looking for an alternate source (I don't like having just one source). Or, can anyone suggest a replacement?

MN3007 - BBD for chorus pedals. Same reasoning as above, just wanting to find an alternate source or part for these.


The big deal is, I'm putting together a largish order with Mouser, since they have stuff so cheaply, so I'd prefer to get all of the chips from one place and in the same order if possible, to save on shipping costs. Some parts I'll have to pick up later from Smallbear and Futurlec, I know, but I want to get an order together for just semi's from source in one order. Anyone?

[The Tone God]

Digikey has the LM3886. I'm surprised Mouser doesn't. The MN3* ICs are mostly out of production so usually you have to find NOS sources like Smallbear. Most IC suppliers will not carry them.

Andrew

[PenPen]

Thanks. I'd forgotten about Digikey. Looks like I'll be waiting before playing with the LM3886 then, I don't want to order just one part from a source. And yes, Mouser does NOT carry the LM3886. Search returned no hits.

That is a shame about the MN3* series. Anyone know of any good replacement chips then? What is everyone going to do when they are gone?

Anyone have any suggestions regarding the TA7136?

[Vsat]

www.bdent.com has the TA7136.
Cheers, Mike

[PenPen]

Indeed they have. Thank you very much, I wasn't aware of that supplier. Looks like they have the LM38868 too, a  bit more expensive, but I could then get both chips at one place. And the MN3101 and MN3007.

Anyone know the differences with the LM3886T vs LM3886TF? I don't seem much difference in the datasheet. Differences in price there, though.

[Pushtone]

Check

http://www.visualsound.net/bbd.htm

For MN3xxx chips.

[PenPen]

Check

http://www.visualsound.net/bbd.htm

For MN3xxx chips.

Nice. Thank you for the link. Would be possible to replace the MN chips in the CE-2 and Small Clone with those two....clock driver and BBD chip, that should be all that is needed. Though I don't know right now if MN3207 is a replacement for MN3007. It looks that way from what I understand but I'm too tired to look further into tonight. Very cool if that is the case, since its way cheaper than the 3007. Small Clone uses a different technique I think for the clock, requiring the CD4047 and some other chips, but the CE-2 build can use the 3201 in place of 3101, the 3201 appears to just be a low voltage version of the 3101.

Very cool that Visual Sound had them made. They seem to be a roll, making us DIYers happy, first they hire R.G., now they have some essential chips reproduced. Pretty fair price on them too....

[Eric H]

Anyone know the differences with the LM3886T vs LM3886TF? I don't seem much difference in the datasheet. Differences in price there, though.

The "TF" is the isolated package --it is coated in a way that requires no isolation washer when mounted to the heat-sink.

-Eric

[puretube]

SmallBear got what you need cc. BBD`s.

Read (search) some threads about swapping BBD`s - it ain`t that easy!

V*sualsound very probably buys them at the same place, where smallbear gets them from - he just doesn`t re-label them...

[PenPen]

The "TF" is the isolated package --it is coated in a way that requires no isolation washer when mounted to the heat-sink.

-Eric

Really? That is a good thing, since the TF version is actually cheaper at that site. I can get two of the TF's for the price of one T version.

Read (search) some threads about swapping BBD`s - it ain`t that easy! V*sualsound very probably buys them at the same place, where smallbear gets them from - he just doesn`t re-label them...

Err, to my knowledge, you should be able to swap the same size BBD in place. The 3007 is a 1024k, the 3207 is 1024k, from what I can see they appear to be nearly the same, save for the 3207 is a low voltage version. Perhaps I'm completely wrong.

Now, I do see your point, I see Smallbear has some chips identical to the VS chips, Steve has these listed as BL3* chips from Shanghai Belling. Same prices too. I'll buy from Steve.

[puretube]

BL is drop in replacement for MN;

3007 is not 3207 !

[Dirk_Hendrik]

3007 is not 3207 !

Though  I'd enjoy the small puff of smoke on the workbench after swapping these two

[tiges_ tendres]

I find this website to be a great help

http://www.findchips.com 

[PenPen]

BL is drop in replacement for MN;

3007 is not 3207 !

What am I missing? The datasheets show identical pinouts. The only differences I can see is that the 3207 is lower voltage. Have to modify the circuit to lower the voltages, but I don't see what else would go wrong. Care to explain?

EDIT: Also, this post http://www.diystompboxes.com/smfforum/index.php?topic=31856.msg219634#msg219634 says the same, the differences is in the supply voltages. Is this incorrect?

[Dirk_Hendrik]

What are you missing?
a) Supply voltage. You've figured that one out allright.
b) The polarity is reversed. While the MN30xx series are positive ground the MN32XX series are potive ground. Maybe you get the drift of that Smoke remark now
c) A large alarm bell rings in the back of my head that one of the datasheets in Mark Hammer's BBdementia.zip (Thanks forever for that file Mark) (has someone mentioned "Panasonic Paranoia" as a filename already?) file contains an error for power supply connection for an MN32xx chip. For exact applications refer to some older Ibanez flangers or delays as well. Copy that and it's correct.

[PenPen]

What are you missing?
a) Supply voltage. You've figured that one out allright.
b) The polarity is reversed. While the MN30xx series are positive ground the MN32XX series are potive ground. Maybe you get the drift of that Smoke remark now
c) A large alarm bell rings in the back of my head that one of the datasheets in Mark Hammer's BBdementia.zip (Thanks forever for that file Mark) (has someone mentioned "Panasonic Paranoia" as a filename already?) file contains an error for power supply connection for an MN32xx chip. For exact applications refer to some older Ibanez flangers or delays as well. Copy that and it's correct.

Right. I should have mentioned changing the polarity of the pwr supply as well as lowering the voltage. I had seen that but didn't post as such.

Now, I AM in fact referencing the datasheets from BBDementia, I am now concerned. Where is the error? I want to make sure I make note of it.

[Dirk_Hendrik]

That took some hunting.

In the datasheet for the MN3205 the application schematic of the last page shows the connections which would be right for a MN3005.

[blues]

Hello PenPen,
You can find on the ebay:
http://cgi.ebay.com/10-MN3007-10-MN3101-chorus-delay-flanger-BBD-chips_W0QQitemZ7380251361QQcategoryZ41415QQcmdZViewItem
Good luck
blues

[The Tone God]

Hello Blues,

I'm not knocking your attempt to help others as I think it is great but maybe next time you should check out the date of the post you are responding to.

Andrew

[blues]

Hello Blues,

I'm not knocking your attempt to help others as I think it is great but maybe next time you should check out the date of the post you are responding to.

Andrew

Hello,
I guess that this forum is to exchange any info for DIY . Who knows maybe one day someone looking for nice source of the parts.:-)
Regards
blues