Abuot PCF8563T Output Clock

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Abuot PCF8563T Output Clock

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bluestyle
Contributor I

hello,

   

   What is the rise time of PCF8563T,It works in the 32.768kHz? And what is the accuracy?

  Since I did not find the corresponding information in the Data Sheet, but  these parameters are quite important.

https://www.nxp.com/docs/en/data-sheet/PCF8563.pdf

Best  regards

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guoweisun
NXP TechSupport
NXP TechSupport

Hi,

For fosc accuracy is 0.2ppm,what is your point the 'rise time'?

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bluestyle
Contributor I

posedge

scope_3.png

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guoweisun
NXP TechSupport
NXP TechSupport

Hi,

So you also want to know the rise time of output clock,right?

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bluestyle
Contributor I

Hi,

   Yes, because the chip I used has requirements for the rise time of the clock.

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guoweisun
NXP TechSupport
NXP TechSupport

Hi,

This CLKOUT is open drain structure,the pull up resistor value will have an affect on rise time.

We don't have the detail information about it.

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