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Jean-Samuel Najnudel - BJT PARTNERS SARL jsn at bjtpartners.comHi Alexander, Thanks a lot for your reply. This is good news. The M25P64-VMF6P costs less than 2 Euros on Avnet Express. By the way, now I understand why the fab quoted me more than 20 Euros for this flash. Farnell France seems to sell this at 21.38 Euros ! Anyway, no problem. I will order through Avnet Express. Best regards. Jean-Samuel. :-) On Tue, Jul 3, 2012 at 11:17 PM, Alexander Chemeris < alexander.chemeris at gmail.com> wrote: > M25P64-VMF6P is a RoHS version of M25P64-VMF6 and thus is fine. > M25P64-VMF6TP should be fine as well (it's a packaging option). Check > out p50 of the datasheet: > http://www.farnell.com/datasheets/1499242.pdf > > On Wed, Jul 4, 2012 at 12:13 AM, Jean-Samuel Najnudel - BJT PARTNERS > SARL <jsn at bjtpartners.com> wrote: > > Hi Andrey, > > > > I have some updates regarding the M25P64-VMF6. > > Please confirm the M25P64-VMF6P would be fine. > > If yes, we can find this at less than 2 Euros. There is no problem. > > This component is fine and we do not need to replace it on the PCB. > > If not, please let me know which other part number could be fine. This > > would help me to find this component at a good price. > > > > By the way, just a question, some distributors (eg: mouser) show this > > component as obsolete. What do you think ? Are you sure we will not > > have any problem to get this component for volume production in the > > future ? > > > > Please let me know. > > > > Best regards. > > > > Jean-Samuel. > > :-) > > > > > > On 7/3/12, Jean-Samuel Najnudel - BJT PARTNERS SARL <jsn at bjtpartners.com> > wrote: > >> Hi Alexander, > >> > >> Thank you very much for your e-mail. > >> > >> 1/ They did not started the PCB manufacturing yet. They are still > >> waiting for my feedback on the questions I asked to Andrey. > >> > >> Actually, if we need to replace the SRAM and/or the flash to use > >> cheaper equivalent components, we may need to reroute the PCB. This is > >> why I ask them to wait for the feedback from Andrey before starting > >> the PCB production. They can start as soon as we let them know what we > >> do about the SRAM and the flash (with or without PCB files update). > >> > >> Anyway, I was not very worried about the delay. As discussed together > >> last time in Paris, before deploying the UmTRX on the field, we would > >> need OpenBTS to support handover. Even for tests, if I open the > >> network without handover, because of the terrain in Mayotte, there > >> will be so much call drops nobody in Mayotte will accept to use our > >> network anymore in the future. Really, handover is very important in > >> Mayotte. > >> > >> As I understand OpenBTS is under development but it is quite hard > >> work. It will probably not be ready before the end of this summer. > >> This is why I did not feel very worried about the PCB production > >> delay. > >> > >> Anyway, I will do my best to get the UmTRX prototypes ready as soon as > >> possible. I just need a feedback from Andrey because, if it does not > >> lower the UmTRX board performances, we should really try to find an > >> alternative solution to use cheaper SRAM and flash chips. This could > >> improve a lot the cost structure of the UmTRX. > >> > >> 2/ I did not contacted Lime yet but I will do this as soon as > >> possible. I will do my best to get the LMS chips on time. > >> > >> By the way, for both PCB assembly and LMS order, how many UmTRX board > >> would you like the fab makes ? We discussed together about 5 or 10 > >> units but we did not took the final decision yet. It can be any > >> reasonable number between 5 and 10. Please let me know the quantity > >> you would need. I will ask the fab and order the component quantities > >> we need. > >> > >> By the way, the meeting with the fab this morning was fine and they > >> are ready to start the production asap. > >> > >> Andrey, please let me know your feedback about my last e-mail and I > >> will push this to the fab asap. > >> > >> Thanks a lot for your help. > >> > >> Best regards. > >> > >> Jean-Samuel. > >> :-) > >> > >> > >> On 7/3/12, Alexander Chemeris <alexander.chemeris at gmail.com> wrote: > >>> Hi Jean-Samuel, > >>> > >>> Thank you for the update! Andrey and I have just arrived back to > Moscow, > >>> hopefully he will be able to answer tomorrow. > >>> > >>> Few questions from me: > >>> > >>> 1. Have they started PCB manufacturing already? With 3w of > manufacturing > >>> time it would be better to start manufacturing asap. > >>> > >>> 2. Have you contacted Lime to get more LMS chips? > >>> > >>> Sent from my Android device. > >>> > >>> -- > >>> Regards, > >>> Alexander Chemeris > >>> CEO, Fairwaves LLC > >>> http://fairwaves.ru > >>> 02.07.2012 22:16 пользователь "Jean-Samuel Najnudel - BJT PARTNERS > SARL" > >>> < > >>> jsn at bjtpartners.com> написал: > >>> > >>>> Hi Andrey, > >>>> > >>>> I have some news from the fab today and I have a meeting with them > >>>> tomorrow morning. > >>>> > >>>> They sent me the BOM with components price list. This bring me a few > >>>> questions. > >>>> > >>>> 1/ Would you know a distributor for the Murata chokes ? The fab them > to > >>>> have some issue to source these. > >>>> > >>>> 2/ Would you suggest a distributor for the GPS chip ? > >>>> > >>>> 3/ The CY7C1460AV33-167AXI costs more than 50 Euros on the list ! I > know > >>>> SRAM is expensive but would you know where we could purchase this > >>>> component > >>>> at a lower price ? If not, do you think we could use a cheaper but > >>>> equivalent SRAM chip ? > >>>> > >>>> 4/ The M25P64-VMF6 costs more than 20 Euros on the list ! This is huge > >>>> for > >>>> a 64M flash. Would you know where we could purchase this component at > a > >>>> lower price ? If not, do you think we could use a cheaper but > equivalent > >>>> flash chip ? > >>>> > >>>> Please let me know about this. This would help me a lot to move > forward > >>>> to > >>>> the next sample production step. > >>>> > >>>> Thanks a lot for your help. > >>>> > >>>> Best regards. > >>>> > >>>> Jean-Samuel. > >>>> :-) > >>>> > >>>> > >>>> On Mon, Jun 18, 2012 at 11:19 AM, Jean-Samuel Najnudel - BJT PARTNERS > >>>> SARL > >>>> <jsn at bjtpartners.com> wrote: > >>>> > >>>>> Hi Andrey, > >>>>> > >>>>> I sent the files last week. The fab needs a few days to update its > >>>>> pricing and launch the production process. > >>>>> Anyway, I just called them today. Work is in progress. They will > >>>>> provide > >>>>> me with some updates later this week. They confirm this should not > take > >>>>> too > >>>>> much time for production and they will anyway contact me if they need > >>>>> anything. > >>>>> I will let you know asap. > >>>>> > >>>>> Best regards. > >>>>> > >>>>> Jean-Samuel. > >>>>> :-) > >>>>> > >>>>> > >>>>> > >>>>> On Mon, Jun 18, 2012 at 9:49 AM, Andrey Sviyazov > >>>>> <andreysviyaz at gmail.com>wrote: > >>>>> > >>>>>> Hi Jean-Samuel. > >>>>>> > >>>>>> Took another week, but still no news from you. > >>>>>> Could you please inform us about the progress in the production of > >>>>>> prototypes. > >>>>>> > >>>>>> Best regards, > >>>>>> Andrey Sviyazov. > >>>>>> > >>>>>> > >>>>>> > >>>>>> 2012/6/13 Andrey Sviyazov <andreysviyaz at gmail.com> > >>>>>> > >>>>>>> Hi Jean-Samuel. > >>>>>>> > >>>>>>> Please inform us about fabrication progress even there are no > issues. > >>>>>>> > >>>>>>> Best regards, > >>>>>>> Andrey Sviyazov. > >>>>>>> (Sent from my mobile client) > >>>>>>> 12.06.2012 4:48 пользователь "Andrey Sviyazov" > >>>>>>> <andreysviyaz at gmail.com> > >>>>>>> написал: > >>>>>>> > >>>>>>> Here PcbDoc file @ 12/06/2012 . > >>>>>>>> So, it all done :) > >>>>>>>> > >>>>>>>> Best regards, > >>>>>>>> Andrey Sviyazov. > >>>>>>>> > >>>>>>>> > >>>>>>>> > >>>>>>>> 2012/6/12 Andrey Sviyazov <andreysviyaz at gmail.com> > >>>>>>>> > >>>>>>>>> Hi all! > >>>>>>>>> > >>>>>>>>> Here final project UmTRXv2 @ 12/06/2012 (PcbDoc file will be > >>>>>>>>> attached > >>>>>>>>> to the next e-mail). > >>>>>>>>> I found an mistake with non-SMD LED's positions in compare to > Ettus > >>>>>>>>> where A-B in left-to-right orientation (see picture). > >>>>>>>>> Andrew Karpenkov suggested me to change it because of it is not > yet > >>>>>>>>> standard but people accustomed to this. > >>>>>>>>> It is done. > >>>>>>>>> > >>>>>>>>> Also he suggest me to make four test points for RXOUT legs of LMS > >>>>>>>>> because he work with this now and found it helpfull. > >>>>>>>>> It is done. > >>>>>>>>> > >>>>>>>>> Also test points which without connector now referenced as TST > and > >>>>>>>>> therefore RefDes of some connectors changed. > >>>>>>>>> > >>>>>>>>> Jean-Samuel, please find Gerber files, NC drill and layer stack > >>>>>>>>> desription files which usually required to produce PCB. > >>>>>>>>> > >>>>>>>>> Best regards, > >>>>>>>>> Andrey Sviyazov. > >>>>>>>>> > >>>>>>>>> > >>>>>>>>> > >>>>>>>>> 2012/6/10 Andrey Sviyazov <andreysviyaz at gmail.com> > >>>>>>>>> > >>>>>>>>>> Hi all! > >>>>>>>>>> > >>>>>>>>>> Here final project UmTRXv2 @ 10/06/2012 (PcbDoc file will be > >>>>>>>>>> attached to the next e-mail). > >>>>>>>>>> Jean-Samuel, please check SMD LED's placed at the front edge of > >>>>>>>>>> the > >>>>>>>>>> PCB. > >>>>>>>>>> If you agree with this variant then I'll generate Gerber files > vs > >>>>>>>>>> required layers and description to produce PCB. > >>>>>>>>>> If anybody find any mistake, please inform me immediatelly. > >>>>>>>>>> > >>>>>>>>>> Best regards, > >>>>>>>>>> Andrey Sviyazov. > >>>>>>>>>> > >>>>>>>>> > >>>>>>>>> > >>>>>>>> > >>>>>> > >>>>> > >>>> > >>> > >> > > > > -- > Regards, > Alexander Chemeris. > CEO, Fairwaves LLC / ООО УмРадио > http://fairwaves.ru > -------------- next part -------------- An HTML attachment was scrubbed... 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