Where can i find the PT2399 Chip?

[crazybuilder]

Where can i find the PT2399 Chip for the rebot2 delay?

-J

[MarkB]

http://www.smallbearelec.com

where else?!
"-)

[Ansil]

http://www.smallbearelec.com

where else?!
"-)

from asking the company for a free sample via email or written leter via snail mail

[puretube]

princeton never replied to me, when asking for quotes...

[Ansil]

princeton never replied to me, when asking for quotes...

wow i am shocked i got one in the mail a little over a week after i emailed them, of course i didint' get a reply from them but i got a chip so i was happy.

[puretube]

Taiwan doesn`t seem to like me...  :cry:
whereas CHINA sure does !!!  

[ExpAnonColin]

Where else?

Me.  I bought a lot of them and could sellthem to you for less than SB.

-Colin

[puretube]

well, I tried the company in Taiwan directly - not an American office -
don`t wanna pay shipping fare-ast to US to europe...
(and don`t wanna bust SB`s or EA`s supply...)

same occurence with the Taiwanese manufacturer of those DC-jacks...

if one of you could link me (PM) to the address you got the stuff from,
I could check whether it`s better to try connecting them via US,
or try my newly found Chinese source for re-issue M*ts*bishi clones...
(yes, Mark/Peter: incl. those with external RAM :wink: ).

ps: I don`t intend to make a business re-selling them...

[ExpAnonColin]

PureTube, e-mail me if you want the stateside distributor I buy them in semi bulk from.

-Colni

[puretube]

Colin: thanx for offering help: you got mail

[mikeb]

Isn't there a Shanghai office for those people making the Mitsubishi clone BBDs? If so, I might be able to help out - I have a previously close contact in Shanghai who is Chinese, and she is kind and I'm sure wouldn't help out with a little translation or possibly even phone contact. PM me for more info....

Cheers

Mike

[puretube]

thank you for the offer, Mike:
Shanghai* is not a problem at all - quite the contrary.... :wink:

but trying to contact several Taiwanese factories for comparison/samples/quotes proved to be impossible for me...

*(Mitsu- and Matsu-/Pana-clones)

[mikeb]

Cool .... yes, the Chinese do appear to have their act together pretty nicely when selling stuff to the outside world. They'll be even more of an economic superpower before long. Watch out Westerners!!!!!

As for Taiwan .... sorry, no ex-g/fs there ....  

Mike

[puretube]

Colin: thank you for helping out!  
I`ll try to get in contact with`em, and see what they got to offer...

There`s some experimenting in my head/on breadboard for several
different gadgets
- ones that call for "all in" chips like the 2399, and others that I`d rather
have direct access to the memory... -

(Vsat (RESPECT!) seems to row a similar boat:
http://diystompboxes.com/sboxforum/viewtopic.php?t=25168&postdays=0&postorder=asc&start=30)

and there was a thread a while ago, pondering over DRAMS for these kinda purposes...

[Peter Snowberg]

.....or try my newly found Chinese source for re-issue M*ts*bishi clones...
(yes, Mark/Peter: incl. those with external RAM :wink: ).

:shock:    

VERY interesting! Please do tell. (by PM if necessary)

Can you buy just one rail?, and are any of the parts SMD?

Thanks!!!!

I've got the DRAM thing all figured out to extend a PT2395 to 25.6 seconds (or 51.2, or....) using surplus computer memory or new manufacture DRAM. :mrgreen: Now I just need to get a PT2395 to test it. It should work find provided that PT chip doesn't use a read-modify-write access methodology. If so, I'll need to make a small adjustment.

I've been toying with discrete first order delta modulators for delay, but the adaptive delta mo/dem in the PT2395 wins out almost by default.

[puretube]

this was the DRAM thread:
http://diystompboxes.com/sboxforum/viewtopic.php?t=22592&highlight=dram

Peter (mikeB): my source "forgot" to send me the 200 chips
last year (during the SARS epidemy...) in another big bulk order,
and I didn`t wanna pay for extra-delivery shipping...

Quite soon I`m gonna place a new large order, there.
(especially since I could lay
hands on a huge pile of Infineon 411000s, lately).

I`d sure be able to spare some to you...

Can`t find the data-sheets in my mess at the moment, but IIRC,
those are in 36, 38, or 40 DIP package (not SMD).....

ps: afaik, the PT2395 is discontinued, as well as the Holtek workalikes,
so these are none of my interest for the future;
- otherwise I woulda just ordered a couple from Smallbear -

if those chips work out well, I`ll give Steve Daniels a wink, so he might
get hold of them...

btw: it`s a pity, M*ts*bishi`s app.-notes have disappeared from the web...

EDIT/OOOPS: PT2395 seems not discontinued, though it had looked like that last year, on their old website:
just been there again, and found it is still listed

-sorry for the disturbance, folks-  
:oops:  :oops:  :oops:

[puretube]

well, the "all in" chip is a 14pin DIP, built-in RAM;
"M65844P compatible";
150ms @ 220kHz (external R/C clock)
(seems similar to the PT2399...)

the other is a 36pin DIP, external 64k or 256k DRAM;
"M50915P compatible";
3 delaytime modes: 100/150/200ms switchable @ 4MHz external X-tal.
A0 to A7, W, RAS, CAS, DI, DO and RESET on discrete pins,
while the mode-select seems to be 3 different counter-outputs, switchable to the reset-pin.

(I`m not sure if M50915P is a Chinese typo...)

Peter: for just trying one or two PT2395s, order from Smallbear: faster than me! (guess he got enough NOS for the DIY-scene ?)

But for experimental reasons, I`d send you 2 or 4 of the latter ones,
to see if they are "extended memorable", too.
-before I start going thru that whole R&D thing myself...-

-will take some time, though-

[mikeb]

Arrgh, the PT2395 is discontinued!!!!!!??  

None of the 41256s on their way to me arrived.

(sigh) the sad story of someone with little money to pursue an idea .... maybe time to think about a bank loan for the biz ....

Mike

[mikeb]

PS All I want is *some* IC that can be used with (moderately) easily purchasable external RAM, price not so important as I'll only ever make anything a few at a time....

Mike

[puretube]

sorry for misleading info:
PT2395 is not obsolete!      

just been to the new website of princeton, and it is still there!!!

(whilst I had in memory it had disappeared from there last year, when I tried to get some info from them...)

this means Smallbear will be able to stock up and ship any time...

SORRY, folks - didn`t wanna shock you...  :cry:  :oops: