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Which devices have an HFXT and LFXT?

Jan Kesten
Expert 1610 points

Hi,

is there any possibility to search for devices which have the option for two crystals? In particular I want to have an 32kHz for RTC and LPM3 but another one for active mode. Some large devices have both as the use launchpad ones, but smaller devices from value line do not.

Is there any rule which families come with HFXT? Or a way to do parametric search (I didn't see XT as filter option)?

Thanks for any pointers,

Jan

  • 0
    TI__Expert 7535 points
    Hi Jan,

    I looked at my parametrics and I don't have a good way to filter by this, but as a general idea:

    Device families with LFXT and seperate HFXT:
    MSP430FR5xx devices
    MSP430FR6xx devices
    MSP430F5xx (most devices, I noticed that the F5172 and some other smaller pin count devices tend to be combined)
    MSP430F6xx devices
    MSP430F4xx (only some devices)
    MSP430F2xx (only some devices)

    Device families with LFXT only or LFXT shared with HFXT:
    MSP430FR4xx devices
    MSP430FR2xx devices
    MSP430G2xx devices

    As always, check again in the datasheet. If you have another peripheral or peripherals you need as well, I can help you find the best device for your application.

    Regards,
    Walter
  • 0 in reply to Walter Schnoor
    Expert 1610 points

    Hi Walter,

    thanks for your quick response - I found a quite cheap FR5xx device which will do the job, but is too big (in terms of pins as I don't need them). But as you said - I seems that only devices with a quite high pin count have seperate LFXT and HFXT. I will click me through the data sheets and the nomenclature - and looking for FR5x7xx devices as the FR5870. I post what I found for others searching: 

  • 0
    TI__Genius 14875 points
    Hi Jan,
    Unfortunately there is no good way to search other than just checking the device to see if it has it. I'll bring this up to the team as a possible update to the parametric search.
  • 0 in reply to Cameron LaFollette
    Expert 1610 points
    Hi Cameron,

    I found the parametric search provided by TI often quite useful and excellent. Of course one can always improve - but with such a lot combinations it's at least difficult to address every issue. But even if it would be too much effort to distinct HFXT with and without shared pins - searching for HFXT would be great :)

    Best regards,
    Jan

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