Hi,
I am using the PCA9511AD i2C buffer and I think that I have problems al low temperatures (-40ºC) when I enable it.
The datasheet only defines the typical enable time (Ten=110us) and says that at low temperatures (<-20ºC) this time can slow considerably for some parts, but does not specify any max. time.
Please, could you define the max. enable time at ambient temperature in the range from -40ºC to +85ºC?
Thanks in advance.
Joseba.
Hi Joseba,
This is a known issue and we screen for it at FT cold temp. Enable time does slow considerably at cold temp but varies greatly from part to part. We do not have any plans to spec the max for that reason.
Best regards,
Tomas
Hi Tomas,
If NXP does not have any plans to specify that max time I do not understand why this device is specified to be used at ambient temperature in the range from -40ºC to +85ºC.
We designed our board with the assumption of a Ten_max time of ten times the typical one (110us) and we see that this is not enough. What could be a good assumption? 20xTen_typ? 50xTen_typ? 100xTen_typ? ...?
Regards,
Joseba.