12505	2016-03-17 11:01:32	Vern VanZ	Source for si570?
Message	Date	From	Subject
Greetings to the group. I've decided I'd like to build my own copy of Farhan's 'reboot' of the specan, but am having some difficulty identifying an online (or otherwise) source for single quantities of the si570 chip. Is there a preferred online source? I've checked Mouser, DigiKey, Newark and Allied; as well as one or two kit sellers. Some list them, but in large minimum quantities, or several week lead times... My apology if I've missed something obvious. Thanks & 73, -Vern N7GTB Kennewick, WA.
12506	2016-03-17 11:13:49	Phil Sittner	Re: Source for si570?
I got mine through sdr-kits.com. Takes a couple of weeks from Great Britain but they are reliable. Phil KD6RM
12507	2016-03-17 11:15:30	ve3ghm	Re: Source for si570?
if you don't mind eBay: http://www.ebay.com/itm/231742382182 http://www.ebay.com/itm/231872884374 http://www.ebay.com/itm/111711960736 http://www.ebay.com/itm/281742284221 Also: http://www.sdr-kits.net/Webshop/index.php?cPath=7&osCsid=i0m75k81a41unar2hfc70k7031 and here: http://km5h.softrockradio.org/index.php?route=product/category&path=35 And I am sure there are others. And failing all that, you might try asking Silicon Labs for a sample. Be aware however, that there are a number of different versions of this particular chip - CMOS and LVDS, and some will go to much higher frequencies than others. None are more difficult to work with than any other but you have to pay attention to the details. cheers, Graham ve3gtc
12508	2016-03-17 11:21:37	Vern VanZ	Re: Source for si570?
Hi Phil, Thanks for the tip. I also just realize a simple way to search my saved emails from this group, and found some of the responses to this same question; asked back in October of last year... 73, -Vern N7GTB Kennewick, WA
12509	2016-03-17 11:35:17	chris grier	Re: Source for si570?
go to www.silabs.com and get free sample Chris GM4YLN
12510	2016-03-17 11:43:28	Cecil Bayona	Re: Source for si570?
Take a look at Tom's KM5H website. < http://km5h.softrockradio.org/index.php?route=product/category&path=35 >
12511	2016-03-17 11:46:15	DuWayne Schmidlko...	Re: Source for si570?
I purchased some from KM5H. He has both CMOS and LVDS versions. http://km5h.softrockradio.org/index.php?route=product/category&path=35 DuWayne KV4QB
12512	2016-03-17 13:26:53	Dave	Re: Source for si570?
Vern: Go to Silabs.com and register. Once registered, you can order 2 free samples at You can either enter in a part number or enter in your specs. The Si570 is available in 3 speed grades. If they are free, might as well order the grade A. Several output formats are available(CMOS, LVDS, LVPECL, CML). You can specify a start-up frequency. You can also specify the I2C address(handy if you have more than one Si570 in your project). The default is 55H. It takes about 2 weeks to get the free samples. You are about 200 miles from me. I am in Kooskia, ID (75 miles SE of Lewiston). My neighbor is from the Tri-Cities. Dave - WB6DHW
12513	2016-03-17 14:20:16	mvs_sarma@ymail.c...	Re: Source for si570?
570CAC000141DG Silicon La bs
12514	2016-03-18 10:21:29	Bill Carver	Re: Source for si570?
Digikey says they only sell unprogrammed Si570s. When used on a board with a microcontroller, will that unprogrammed Si570 operate properly, or MUST you have a device which has been programmed? W7AAZ
12515	2016-03-18 10:50:43	Dana Myers	Re: Source for si570?

12516	2016-03-18 11:01:37	Bill Carver	Re: Source for si570?
Dana K6JQ sez........the Si570 datasheet talks about a "factory default" value, which makes me think Digi-Key means "non-customized" when they say "unprogrammed". The Si570 doesn't seem limited in terms of programming via I2C: If someone can confirm that a non-programmed Si570 is definitely fully functional via its I2C interface, that would be another notch in the Si570's belt. W7AAZ
12517	2016-03-18 14:44:10	Vern VanZ	Re: Source for si570?
Hi Dave, Thanks for the info on the si570. I'll register and get a couple headed my way... "You are about 200 miles from me. I am in Kooskia, ID (75 miles SE of Lewiston). My neighbor is from the Tri-Cities." I like Idaho. I've lived in 'Warshingtun' and (more specifically) the TriCities all my life. My paternal grandfather moved out to the old towns of White Bluffs and Hanford back around 1934, and there's been a Van Zandt in the area ever since (if you're not familiar with Hanford, just ask your neighbor). But the gun control in this state is getting too aggravatingly restrictive for my liking. The T.C. is also so full of transplants now, that I hardly recognize it anymore. My wife and I will be headed for Boise on the motorcycles for a big Victory rally there this July. Will likely be hot, but that's ok with me... 73, -Vern N7GTB Kennewick, WA
12518	2016-03-18 14:46:15	Vern VanZ	Re: Source for si570?
sorry to spam the entire group with this. I only intended it for Dave... still can't seem to work this damned yahoo email interface... 73, -Vern
12647	2016-04-12 23:24:53	Dana Myers	Re: Source for si570?