TUSB3410: Required specification of external clock module connecting to XI/CLKI

takishin

Part Number: TUSB3410

Hi,

Our customer needs more detailed requirement for the external clock module connecting to XI/CLKI.
Could you tell me the Tr & Tf of CLKI input timing, frequency tolerance and so on?

Thank you in advance.

Best regards,
Takishin

over 9 years ago

0 Roberto Diaz over 9 years ago

TI__Genius 11255 points

Hello Takishin,

THe TUSB3410 requres a 12Mhz Crystal to work. The Crystal requirements are decribed in section 6.5 on the TUSB3410 data, for your reference the part that we have tested in our design is a 12Mhz crytal (P-16808) from Crystek.

Regards,
Roberto

0 takishin over 9 years ago in reply to Roberto Diaz

Expert 2360 points

Hi Roberto,

Thank you for your reply.

Our customer is going to use an oscillator module instead of a 12MHz crystal.

If there are some requirements for the oscillator module, Please let me know the requirements.

Best regards,
Takishin

0 Roberto Diaz over 9 years ago in reply to takishin

TI__Genius 11255 points

Hello Takishin,

If you are going to use an external oscilator, you need to provide a 12Mhz clock signal to X1 pin this signal should not exceed the 1.8V. and leave X2 unconnected.

Regards,
Roberto

0 takishin over 9 years ago in reply to Roberto Diaz

Expert 2360 points

Hi Roberto,

We need the information of output of an external oscillator module.

What is your recommendation about the tr/tf, duty cycle and frequency tolerance for the oscillator?

Best regards,
Takishin

0 Roberto Diaz over 9 years ago in reply to takishin

TI__Genius 11255 points

Hello Takishin,

1)For 20% to 80% mus be a tr/tf of 6ns

2)Duty cycle of 50 %

3)Tolerance of +-100PPM

Regards,
Roberto

0 takishin over 9 years ago in reply to Roberto Diaz

Expert 2360 points

Hi Roberto,

Thank you for your answer.

I will report them to the customer.

Best regards,

Takishin

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TUSB3410: Required specification of external clock module connecting to XI/CLKI