TMS320F280049: F280049 - External Crystal select

Johnny Shih

Intellectual 535 points

Part Number: TMS320F280049
Other Parts Discussed in Thread: TMDSCNCD280049C, LAUNCHXL-F280049C

Dear TI team,

We want to use external crystal for F280049, we have 3 item can select,

Please suggest as to choose as attachment.

If all can use, alse let me know,

thanks a lot.

7P20001013_S1.pdf 7Z20070001_S1.pdf 2015-1174.pdf

over 6 years ago

0 Frank Ankapong over 6 years ago

TI__Mastermind 28275 points

Hi Johnny,

We can't recommend the 3rd party parts for you to get and it will be your responsibility to thoroughly vet the parts you choose. However, the single-ended oscillator you choose has to meet our timing requirements and levels. This includes:
1. Duty Cycle of 45%-55%.
2. Rise/Fall time max of 6ns.
3. Vih/Vil levels.

Looking at the 3 oscillators, it doesn't look like any of them meet all 3 requirements. The closest i think is the 7P20001013_S1 but it's rise/fall time is out of our specification.