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Topic: [SOLVED]can i find this chip ?  (Read 2579 times) previous topic - next topic

amine2

Sep 05, 2015, 07:05 pm Last Edit: Sep 06, 2015, 02:37 am by amine2
a perfect match for what i need is a "IDT7M1001" dual port sram of 128kb or higher that is in a DIP package (the idt7m1001 has 64pins) .
though it's like the chip disappeared , i cant find it anywhere .
(it did exist at some point in time)
can i find this chip ? or any chip that does the same thing ?
or can i find an old machine or something that i can collect and that contains the "IDT7M1001"
it's all about the melons .

MarkT

Probably legacy now - however the datasheet I found said 1995 and its a MILSPEC multi-chip ceramic
module, so someone somewhere will have stock I suspect, but I doubt for sale (for support of existing
products).
[ I will NOT respond to personal messages, I WILL delete them, use the forum please ]

amine2

#2
Sep 06, 2015, 01:56 am Last Edit: Sep 06, 2015, 01:59 am by amine2
thank you very much Mark, hmm can the chip be used in a circuit of some product ? to be collected ? .
or can i find a similar chip ? what do you think Mark
it's all about the melons .

MarkT

There's no way to find out what products normally - your best bet is to ring up the manufacturer
and hope they find the time to be helpful.  Assuming they still exist.
[ I will NOT respond to personal messages, I WILL delete them, use the forum please ]

amine2

#4
Sep 06, 2015, 02:11 am Last Edit: Sep 06, 2015, 02:19 am by amine2
i did communicate with them , the still do have the chip but no longer produce it , though only provide in large quantities , i need to pay around 1000 dollars for this so i dont think that would be possible
it's all about the melons .

aarg

You could program a pro mini as a dual port RAM controller. ;)
  ... with a transistor and a large sum of money to spend ...
Please don't PM me with technical questions. Post them in the forum.

amine2

#6
Sep 06, 2015, 02:24 am Last Edit: Sep 06, 2015, 02:28 am by amine2
thank you aarg :) , i don't think that would be possible though , i need 128kbs a fast response time and a parallel protocol of communication , the chip i need has 64 pins.  though i did find an SMD alternative for 70dollars (expensive!) though i need DIP , cant figure how to manage that
it's all about the melons .

aarg

thank you aarg :) , i don't think that would be possible though , i need 128kbs a fast response time and a parallel protocol of the communication , the chip i need has 64 pins
Yeah, I should have added that it would just be the glue logic. You would also need RAM, bus buffers and an address multiplexer. As far as speed goes, it would be slower. A better solution would be an ASIC.
  ... with a transistor and a large sum of money to spend ...
Please don't PM me with technical questions. Post them in the forum.

amine2

it's all about the melons .

aarg

  ... with a transistor and a large sum of money to spend ...
Please don't PM me with technical questions. Post them in the forum.

amine2

thank you very much aarg .
though here is what i found to , the IDT7009 is an other chip that is active and available and that does the same thing but .. its in a tqfp100 package 14mm*14mm for 70dollars . a tqfp100 to dip100 costs 15dollars
total would be 85dollars , though would this be worth it ? and how am i supposed to solder a chip so small (i think i can get someone to do it though).
that chip 99dollars , after delivery it would be 130dollars for me ...
what do you think aarg
it's all about the melons .

DrAzzy

#11
Sep 06, 2015, 03:36 am Last Edit: Sep 06, 2015, 03:37 am by DrAzzy
It's not that TQFP is that hard to solder (using drag soldering technique) - it's that you're soldering a $70 chip, so you better not screw up.

I'm seeing TQFP100 breakout's for under $2/each on ebay - unless you need some weird form factor for the output (the ones I see cheap are square, with pins around the perimeter - if you need 2 lines of pins instead, those look less abundant). I'd buy some of those, and the cheapest TQFP100 chips you can find, and do some practice runs to get the hang of drag soldering.

http://www.ebay.com/sch/i.html?_from=R40&_trksid=p2050601.m570.l1313.TR1.TRC0.A0.H0.XTQFP-100.TRS0&_nkw=TQFP-100&_sacat=0
ATTinyCore for x4/x5/x61/x7/x8/x41/1634/828/x313 megaTinyCore for the megaavr ATtinies - Board Manager:
http://drazzy.com/package_drazzy.com_index.json
ATtiny breakouts, mosfets, awesome prototyping board in my store http://tindie.com/stores/DrAzzy

CrossRoads

Digikey carries 128k x 8 dual port SRAM, here's one example
http://www.digikey.com/product-detail/en/70V09L20PFI/800-2605-ND/2009974

If digikey carries it, www.proto-advantage.com can order it and mount it on a breakout adapter for you.
Designing & building electrical circuits for over 25 years.  Screw Shield for Mega/Due/Uno,  Bobuino with ATMega1284P, & other '328P & '1284P creations & offerings at  my website.

CrossRoads

IDT7M1001 is a multichip module, 8 SRAMs and 2 '138 1 of 8 decoders.
http://datasheet.eeworld.com.cn/pdf/IDT/129616_IDT7M1001.pdf

Its connections are shown in the datasheet.
Worse case, you buy the 10 needed chips and make up your own circuit, will just be larger than the 10-die module.
http://www.digikey.com/product-search/en?pv149=53&FV=fff40027%2Cfff80434&k=sram&mnonly=0&newproducts=0&ColumnSort=0&page=1&stock=1&quantity=0&ptm=0&fid=0&pageSize=25


Designing & building electrical circuits for over 25 years.  Screw Shield for Mega/Due/Uno,  Bobuino with ATMega1284P, & other '328P & '1284P creations & offerings at  my website.

amine2

thank you alot DrAzzy :) .

thank you very much CrossRoads i don't think wiring the full 10 component circuit would be the best thing to do , soldering the surface mount chip to the adapter might be though :)
it's all about the melons .

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