**WANT MORE??** Dont forget to see everything else in the [[partselector:|Part selector index]]!


===== Crystals =====

Notes on crystals:
  * Crystals are high precision timekeeping devices - much better than resonators - but are more $ and may require capacitors
  * Frequencies may vary with temperature and the capacitors used
  * In general we'll have the larger/cheaper packages
  * If you need to have matching capacitors, pick ones a couple pF smaller than double the load capacitance rated. For example, a 12.5pF clock crystal would take ~20pF caps

^ Image ^ Description ^ Part # and datasheet ^ Distributors ^  Eagle lib.  ^
| {{http://www.ladyada.net/images/parts/crystalcyl_t.jpg}} | 32.768 KHz (12.5pF) for timekeeping | [[http://www.abracon.com/Resonators/AB38T.pdf|Generic]] | [[http://www.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=535-9034-ND|Digikey]] [[http://mouser.com/Search/ProductDetail.aspx?qs=sGAEpiMZZMtg8rPr%252bGIKJmkxQqIPZPL8Se0a4BCRnM4%3d|Mouser]] |  crystal:TC38H  |
|  {{http://www.ladyada.net/images/parts/5mhzcrystal_t.jpg}} | 5.0000 MHz in HC-49 package | [[http://www.ecsxtal.com/store/pdf/hc49ux.pdf|Generic]] | [[http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail?name=X989-ND|Digikey]] [[http://www.mouser.com/Search/ProductDetail.aspx?qs=H8AWquzS%2FlO62TyBBkCFzw%3D%3D|Mouser]] |  crystal:HC49  |
|  {{http://www.ladyada.net/images/parts/hc49u_t.jpg}}  | 3.579545 MHz ("colorburst") crystal | [[http://www.ecsxtal.com/store/pdf/hc49ux.pdf|Generic]] | [[http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail?name=X079-ND|Digikey]] [[http://www.mouser.com/Search/ProductDetail.aspx?qs=2xLVn2jvFusFbv3v5Whu4Q%3d%3d|Mouser]] |  crystal:HC49  |
|  either CYL or HC49  | 28.63636MHz Crystal | [[http://www.citizencrystal.com/images/pdf/m-hc49us.pdf|Generic]]  |  [[http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail?name=300-8517-ND|Digikey]] [[http://www.mouser.com/Search/ProductDetail.aspx?qs=GgB7MJ%2fTIsQs%2fWKCt7j7Og%3d%3d|Mouser]] |  crystal:TC38H  |
===== Resonators =====
Notes on Resonators:

    * Resonators are reasonable-precision timekeeping devices - not as good as crystals but better than RC oscillators. Cheap & easy to use
    * Frequencies may vary with temperature and voltage used
    * Theres a couple manufacturers so we have multiple links
    * They have built in capacitors so just connect middle pin to ground and the outer two to the crystal pins of your oscillator

^ Image ^ Description ^ Part # and datasheet ^ Distributors ^  Eagle Lib.  ^
|  {{http://www.ladyada.net/images/parts/xtal16m_t.jpg}}  | 16.00 MHz ceramic oscillator with caps  | [[http://www.ecsxtal.com/store/pdf/zttr.pdf|ZTT-16.00]] \\ [[http://www.abracon.com/Resonators/awcr.pdf|AWCR-16.00MD]] \\ [[http://www.murata.com/catalog/p16e18.pdf|CSTLS16M0X55]] | [[http://www.digikey.com/scripts/DkSearch/dksus.dll?Detail?name=X908-ND|Digikey]] [[http://www.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=490-1214-ND|Digikey]] \\ [[http://www.mouser.com/ProductDetail/ABRACON/AWCR-1600MD/?qs=sGAEpiMZZMsBj6bBr9Q9aZwSgYMCcq7%2fcMTJQczuqac%3d|Mouser]] [[http://www.mouser.com/ProductDetail/ECS/ZTT-1600MX/?qs=A5Qiz0JZgg6Zglf9C77YkQ%3d%3d|Mouser]] |  [[http://www.ladyada.net/library/pcb/eaglelibrary.html|Adafruit:CERMOSCILL]]  |
|  {{http://www.ladyada.net/images/parts/8MHzcermosc_t.jpg}}  | 8.00 MHz ceramic oscillator with caps | [[http://www.ecsxtal.com/store/pdf/zttr.pdf|ZTT-8.00]] \\ [[http://www.abracon.com/Resonators/awcr.pdf|AWCR-8.00MD]] \\ [[http://www.murata.com/catalog/p16e18.pdf|CSTLS8M0X55]] | [[http://www.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=490-1223-ND|Digikey]] [[http://www.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=X905-ND|Digikey]] \\ [[http://www.mouser.com/ProductDetail/Murata/CSTLS8M00G53-B0/?qs=sGAEpiMZZMsBj6bBr9Q9abaXaKxoavYLgZ8eN7Q5mnE%3d|Mouser]] [[http://www.mouser.com/ProductDetail/TDK/FCR80MC5/?qs=sGAEpiMZZMsBj6bBr9Q9aVpiy1fX3S309ymr3bnig20%3d|Mouser]] [[http://www.mouser.com/ProductDetail/ABRACON/AWCR-800MD/?qs=sGAEpiMZZMsBj6bBr9Q9aZwSgYMCcq7%2fZcInC2wzFEc%3d|Mouser]] |  [[http://www.ladyada.net/library/pcb/eaglelibrary.html|Adafruit:CERMOSCILL]]  |
|  {{http://www.ladyada.net/images/parts/cermosc12mhz_t.jpg}}  | 12.00 MHz ceramic oscillator with caps | [[http://www.ecsxtal.com/store/pdf/zttr.pdf|ZTT-12]]  |  [[http://www.mouser.com/ProductDetail/ECS/ZTT-1200MT/?qs=sGAEpiMZZMsBj6bBr9Q9aZIadeecJwnJPm%2fM1ZYej7A%3d|Mouser]]  [[http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=X907-ND|Digikey]]  |  [[http://www.ladyada.net/library/pcb/eaglelibrary.html|Adafruit:CERMOSCILL]]  |