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MSP430F2274-EP 12MHz Crystal

Zebryk
Expert 1240 points
Other Parts Discussed in Thread: MSP430F2274-EP, MSP430F2274

I am looking for recommendations for a 12MHz external crystal for use with the MSP430F2274-EP. This system needs to operate between -40C and +125C. Information on high-frequency (>32KHz) crystals seems to be pretty sparse so I am wondering how often MSP430's are used in precision applications. As a starting point, MFG's and part#,s for 8MHz, 10MHz, and 16MHz would be highly usefull if anyone has had good experience with these.

  • 0
    TI__Genius 16205 points

    Hi,

    Unfortunately, we don't have any manufacturers that we can recommend for your design. However, the best recommendation that I could provide here is to look at our application note SLAA322. This application note contains some useful information on selecting the proper oscillator for your design. Although this app note is written for 32kHz crystal, there are parts of the document that may pertain to the fundamentals of using an external crystals like design constraints and etc.

    After doing a quick search on Digikey, I found several choices from various manufacturers (Abracon and ECS) that supports the temperature range that you are seeking for.

    Regards,

    William

  • 0 in reply to William Goh
    Expert 1935 points

    According to the msp430f2274-ep data sheet, you can't use any crystal (low or high frequency) at temperature above 105C.  It says in several places to use an oscillator for that... if that's not the case I'd like to know too!

     

    I'm investigating Statek and ECS...

  • 0
    Guru 227245 points

    Z said:
    This system needs to operate between -40C and +125C.

    While the maximum storage temperature for an unprogrammed device is -55°C to +150°C, the maximum storage temperatur for a programmed device is -40°C to +85°C, which also are the recommended operating conditions.
    Operating above 85°C has an increased risk of losing the flash content.

    Unless you use a 'military specs' version (which is not listed in teh datasheets, if available at all)

    Currently, I cannto recommend any crystal. We hat an 8Mhz which worked well, but recently we had problems (according to the distributor the same type of crystal as before, same specs) So I cannot really recommed it anymore.

  • 0
    Guru 17650 points

    Hi Z,

    I'm evaluating SiTimes (www.sitime.com) MEMS-based silicon oscillators at the moment (I'm using SiT8103 with an MSP430F2274).

    Maybe you want to have a look at SiT8002AA which is having a TOP of -40°C to +125°C (http://www.sitime.com/products/show-more-products/automotive/sit8002aa).

    Be shure to enable the Oscillator Fault ISR when using these Oscillators (because of their power up time)!

    Rgds
    aBUGSworstnightmare 

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