smd crystal(quartz) for LPC1549

iharihar — Wed, 16 Sep 2020 17:14:48 GMT

Could I use CSTNE12M0GH5L000R0

12 Mhz smd crystal (quartz) for LPC1549 with USB(CDC) and CAN interfaces application?

This quartz has frequency tolerance 0.07% and frequency stability 0.11%,

the built-in capacitors in case of the part are 33 pF (Uoscin -= 1.08V, Uoscout =1.3V

Before I used PRQC12.00CR1010V00L smd quartz with 10 pF built-in capacitors

(Uoscin -= 1.0V, Uoscout =1.5V) and frequency tolerance 0.1% and frequency stability 0.1%.

But it is not available now.

NXP also recommends the quartz with the external capacitors 7-10 pF.

in R_10075 "Driving LPC1500 with EPSON Crystals"

Re: smd crystal(quartz) for LPC1549

gusarambula — Fri, 18 Sep 2020 00:39:10 GMT

Hello iharihar,

We do not have a list of other recommended crystals you may use other than the ones listed on the R_10075 document and those used in our boards. I would strongly recommend using a crystal that is similar in characteristics to those recommended, especially if you will be using USB and CAN.

From what I would see on the CSTNE12M0GH5L000R0 datasheet, it has both a much higher load capacitance and frequency tolerance. This would affect the drive load and problems with the high-speed interfaces, so I would recommend looking for a crystal with similar properties as those on the list. You may look for the datasheet of the recommended crystal for comparison.

My apologies for the inconvenience.

Regards,
Gustavo

LPC Microcontrollersのトピックsmd crystal(quartz) for LPC1549

smd crystal(quartz) for LPC1549

Re: smd crystal(quartz) for LPC1549