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Microcontroller can run with either of these crystals?

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treez

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Hello,

We are using the SAM3N00B microcontroller with the following crystal , "HC49SM" it is 4MHz.

The PCB assemblers have offered us a much cheaper alternative, it is "HC49US", also 4MHz.

(both datasheets are attached)

Do you know if its OK to use either of these crystals with this microcontroller?

SAM3N00B datasheet
http://www.atmel.com/Images/doc11011.pdf
 

Attachments

  • HC49SM-4-30-50-60-16-ATF 4MHZ.....as in current BOM.pdf
    356.5 KB · Views: 95
  • HC49US SMX standard..as recomended by pcb assemblers.pdf
    180.4 KB · Views: 143

Hi,

Well one is a though hole type the other smd, hence being cheaper.

Thought those chips had an internal 4mhz oscillator, is your work that critical it needs an external crystal and caps ?
 
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Maybe you're right, there is also a 32.678KHz crystal for timing purposes as its an emergency light. I suppose i dont need the 4mhz crystal....but it would be nice to know it these are noth usable. They both have SMD versions.

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