Hello,
perhaps this question was stated elsewhere but I didn't find any clue where it might be. It's about oscillators, most important, the source where it can be bought.
In the past days, I've working to design one simple PCB for an USB to I2S app. My very first and obvious intention was to to use crystal based oscillators, namely: 22.5792 Mhz and 24.576 Mhz. Preferably (but not limited to...) TCXO parts.
Consulting various forums and posts, I've come to conclusion that, among other valid options (?whatever that means), NDK's NZ2520SD parts are (from theory) the best I can have for this purpose. After over one week of emails and questions to various "authorised" NDK distribuitors across Europe listed on their web page... I came to conclusion that my chances to aquire these parts (less than 50) in EU zone are minimal to zero. So, here is my question: There si anyone who knows how to aquire these crystal - based oscillators? Or: there are other alternatives to these parts (regarding phase noise / voltage supply and perhaps price). Please note that the package dimensions aren't important.. just to remind you, I don't like bricks, unless there's rubidium inside
! In addition, the parts mentioned above are prety small but I can handle it so, something similar will not be an issue.
Thank you for your time reading my post,
L
perhaps this question was stated elsewhere but I didn't find any clue where it might be. It's about oscillators, most important, the source where it can be bought.
In the past days, I've working to design one simple PCB for an USB to I2S app. My very first and obvious intention was to to use crystal based oscillators, namely: 22.5792 Mhz and 24.576 Mhz. Preferably (but not limited to...) TCXO parts.
Consulting various forums and posts, I've come to conclusion that, among other valid options (?whatever that means), NDK's NZ2520SD parts are (from theory) the best I can have for this purpose. After over one week of emails and questions to various "authorised" NDK distribuitors across Europe listed on their web page... I came to conclusion that my chances to aquire these parts (less than 50) in EU zone are minimal to zero. So, here is my question: There si anyone who knows how to aquire these crystal - based oscillators? Or: there are other alternatives to these parts (regarding phase noise / voltage supply and perhaps price). Please note that the package dimensions aren't important.. just to remind you, I don't like bricks, unless there's rubidium inside
! In addition, the parts mentioned above are prety small but I can handle it so, something similar will not be an issue.Thank you for your time reading my post,
L
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What about the Crystek C3391?
Am I right in seeing the NZ2520S has 10x less jitter though? It's hard for me to tell since one gives phase noise and the other gives RMS jitter (and I'm a noob).
The CS3391 says 0.5psec, but I think the NZ2520S is 0.055psec.
Is this phase noise conversion correct?
Am I right in seeing the NZ2520S has 10x less jitter though? It's hard for me to tell since one gives phase noise and the other gives RMS jitter (and I'm a noob).
The CS3391 says 0.5psec, but I think the NZ2520S is 0.055psec.
Is this phase noise conversion correct?
Thank you for posting!
@jean-paul: I was sarcastic about rubidium I know that are very good oscillators but are way too expensive for what I want to build (their price is at least three times larger than total cost of my entire application). Besides that, 10MHz is not a valid freq. for me... though I thank you for your intention and suport!
@ theAnonymous1: I know about Crysteks but it's harder for me to buy it in EU. Farnell has some parts, mostly VCXOs - useless. 22.5792Mhz freq is what it kills me mostly! In fact, 24.576MHz oscillators are prety easy to find!
Today I'll look @ Mouser for c3391-22.5792 MHz. I hope those oscillators are accessible in small quantities (<= 100pcs.).
NDK story: still no official answer from any of them. It becomes ridiculous while time is passing and chances to answer are fading accordingly!
L
@jean-paul: I was sarcastic about rubidium
I know that are very good oscillators but are way too expensive for what I want to build (their price is at least three times larger than total cost of my entire application). Besides that, 10MHz is not a valid freq. for me... though I thank you for your intention and suport!@ theAnonymous1: I know about Crysteks but it's harder for me to buy it in EU. Farnell has some parts, mostly VCXOs - useless. 22.5792Mhz freq is what it kills me mostly! In fact, 24.576MHz oscillators are prety easy to find!
Today I'll look @ Mouser for c3391-22.5792 MHz. I hope those oscillators are accessible in small quantities (<= 100pcs.).
NDK story: still no official answer from any of them. It becomes ridiculous while time is passing and chances to answer are fading accordingly!
L
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It looks like the minimum order amount for that frequency is 360pcs.
For some reason 22.5792MHz XO's are rare (and expensive too).
Try IQD - they are the experts in crystals and oscillators. They've always been very helpful to me.
IQD Worldwide Frequency Control Products | Quartz Crystals, Clock Oscillators, OCXOs, Programmables, SPXOs (Clocks), TCVCXOs, TCXOs, VCTCXOs, VCXOs
yeah... they hit me with 360 pieces! Huh! what should I do with so many of them: seed into the ground?
@ Huntingdon 361: thanx mate! I'll contact them and see if I could get some useful infos. Still, do you have any sugestions?.. perhaps a family serial number (maybe with 22.5792 MHz freq). I'll look this weekend into their offer.
L
@ Huntingdon 361: thanx mate! I'll contact them and see if I could get some useful infos. Still, do you have any sugestions?.. perhaps a family serial number (maybe with 22.5792 MHz freq). I'll look this weekend into their offer.
L
It looks like he is using the NZ2520SD for the 22.5792MHz clock and he says they were purchased from chip1stop - One Stop Shopping Procurement Service for Electronic Components - for 18USD each.
That's still rather expensive for a XO type that only cost a few dollars when bought in other frequencies. I don't get it.
NDK quoted me $1.35 each for 24.576MHz, but the MOQ was 1k pieces.
Even from looking at other brands of oscillators, 22.5792MHz is generally more expensive for some reason.
Yes, this thread was my starting point but, as you'll notice after reading my first post, NDKs are hard to find in EU. Moreover, I simply don't like Fox (from various reasons) and discrete implementation is NOT a viable alternative to me (at least for now).
I've also received a quote from NDK's italian representative and this is how it looks like:
"We can offer both Oscillator at following condition
U/P: 250JPY 1K Lot each freq.
LT: 8-12WKS
FCA Milan
Payment T/T Advance
1. NZ2520SD-22.579200M-NSA3449C
2. NZ2520SD-24.576000M-NSA3449C
Thanks for your attention"
@ theAnonymous1: I could say that you're lucky with your 1,35$/pcs in 1k Q (read above).
Perhaps, in the future I'll look at this alternative... until then, I don't have the mood to spent that amount of money on 1k quantities (unless there are others who want these oscillators, especially 22.5792 MHz part - group buy?).
I'll continue searching equivalents at IQD. I hope I'll have better luck there! It's awkward not to be able to finish a product necause of a single oscillator
)L
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Yes, that's strange. Why would the same company quote you $2.94 each when they told me $1.35.
If I had $1,400 to spend I would buy them. I'm sure I could sell them all in a very short time.
I'm thinking to listen theAnonymous1 and buy C33x stock of 500 pcs. Still debate this ideea but it's obvious that it's a no go for me in small Qs!
So, in case that I'll aquire 500 parts, is there anyone interested in Crysteks C3391-22.5792 Mhz oscillators?
Second question: while searching, I've seen this part: eBay Österreich: Ultra precision 1ppm 22.5792MHz TCXO crystal oscillator (Artikel 130343587252 endet 06.09.10 13:44:30 MESZ)
it's a Vanguard 22.5792 Mhz TCXO in a different package and comes with other price tag but... any ideeas if worth the effort of implementing it?
L
So, in case that I'll aquire 500 parts, is there anyone interested in Crysteks C3391-22.5792 Mhz oscillators?
Second question: while searching, I've seen this part: eBay Österreich: Ultra precision 1ppm 22.5792MHz TCXO crystal oscillator (Artikel 130343587252 endet 06.09.10 13:44:30 MESZ)
it's a Vanguard 22.5792 Mhz TCXO in a different package and comes with other price tag but... any ideeas if worth the effort of implementing it?
L
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This is half the frequency:-
11.2896MHz TCXO items - Get great deals on Consumer Electronics, Business, Office Industrial items on eBay UK!
It is 44100* 256 ...but you could set up an ebay search in the frequencies you want.
w
11.2896MHz TCXO items - Get great deals on Consumer Electronics, Business, Office Industrial items on eBay UK!
It is 44100* 256 ...but you could set up an ebay search in the frequencies you want.
w
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Thanx but I want 176.4 fs option available (with two osc clocks for every I2S bit clock - for edge aligning) so this oscillator is not useful to me.
Unfortunately, the time spent with IQD was mostly in vain. This is the answer that says all:
"Hello,
Speaking to my manager here, I have been told that we cannot offer 22.5792mhz crystal.
Thanks
Sarah"
He, he... and after reading this answer and few datasheets, I've figured out that you can order oscillators but the requested frequency must be three digit number (lack of precision?)
After two weeks, I'm still searching...
L
Unfortunately, the time spent with IQD was mostly in vain. This is the answer that says all:
"Hello,
Speaking to my manager here, I have been told that we cannot offer 22.5792mhz crystal.
Thanks
Sarah"
He, he... and after reading this answer and few datasheets, I've figured out that you can order oscillators but the requested frequency must be three digit number (lack of precision?
)After two weeks, I'm still searching...
L
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We know NDK has a MOQ of 1k pieces, but maybe I'll see if I can sweet talk some samples out of them.
@ theAnonymous1: nice gesture from you, thanx for the effort!
Sorry for this late reply but I wanted to have some answers befor any replies and my wish comes true. About crysteks here's the most clearer answer I could get:
"Thank you for your interest in our line of clock oscillators.
Currently there is no stock at any distributors. We recommend you check
with Mouser Electronics, or Digi-key, for pricing and availability, but
minimum order is one thousand pieces.
The link to our distributors websites is, as follows:
Crystek Crystals, PECL, SMD VCXO, Clock Oscillators
Lead-time is about 10 weeks.
Best regards,
Luiz Oricchio
Sales Manager
Crystek Corporation"
No really?! What I could wished more? Have the money, wait until Christmas.. and still no chance to have those parts in my hand.
In the end, without any other alternative... I choosed what I hated most: FXO-HC735-22.5792 Fox XO Oscillators
.. big, expensive, ordinary from specs and (best of all)... in 9 pcs. FYI, I want to buy 10 pcs to have another price tag per part (13.83€).
For NDKs there's no other hope, unless a miracle hits EU in near future.
L
Sorry for this late reply but I wanted to have some answers befor any replies and my wish comes true. About crysteks here's the most clearer answer I could get:
"Thank you for your interest in our line of clock oscillators.
Currently there is no stock at any distributors. We recommend you check
with Mouser Electronics, or Digi-key, for pricing and availability, but
minimum order is one thousand pieces.
The link to our distributors websites is, as follows:
Crystek Crystals, PECL, SMD VCXO, Clock Oscillators
Lead-time is about 10 weeks.
Best regards,
Luiz Oricchio
Sales Manager
Crystek Corporation"
No really?! What I could wished more? Have the money, wait until Christmas.. and still no chance to have those parts in my hand.
In the end, without any other alternative... I choosed what I hated most: FXO-HC735-22.5792 Fox XO Oscillators
.. big, expensive, ordinary from specs and (best of all)... in 9 pcs. FYI, I want to buy 10 pcs to have another price tag per part (13.83€).
For NDKs there's no other hope, unless a miracle hits EU in near future.
L
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PSU for oscillators
Hello guys,
I'm not sure if I'm allowed to post this type of question here but I'll give it a try. It's related to these magical SMD oscillators for digital audio.
Since I'm forced to use this oscillator: http://www.foxonline.com/pdfs/FXO_HC73.pdf, I've started to seach a PSU for it. I want it to be small (no discrete designs unless it's not so complicated and performs really good / worth the effort) ... one 8 pin SO chip I guess it would be appropriate for this task. I was thinking at LT1763 since it's commonly used BUT there is other chip with better specs?
In my application, I'm thinking to use two of these ICs, one for each oscillator, so 50 mA supply current I guess would be enough.
Other suggestion would be this: http://cds.linear.com/docs/Datasheet/1461f.pdf . I'm thinking to use it... if it proves that can handle the job.
Any inputs would be appreciated,
L
Hello guys,
I'm not sure if I'm allowed to post this type of question here but I'll give it a try. It's related to these magical SMD oscillators for digital audio.
Since I'm forced to use this oscillator: http://www.foxonline.com/pdfs/FXO_HC73.pdf, I've started to seach a PSU for it. I want it to be small (no discrete designs unless it's not so complicated and performs really good / worth the effort) ... one 8 pin SO chip I guess it would be appropriate for this task. I was thinking at LT1763 since it's commonly used BUT there is other chip with better specs?
In my application, I'm thinking to use two of these ICs, one for each oscillator, so 50 mA supply current I guess would be enough.
Other suggestion would be this: http://cds.linear.com/docs/Datasheet/1461f.pdf . I'm thinking to use it... if it proves that can handle the job.
Any inputs would be appreciated,
L
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