Please help provide TI solution ：one jitter attenuator only with one input and one output

Carol Xue

Prodigy 30 points

Other Parts Discussed in Thread: LMK05318B, LMK5B12204

Hi teams!

I am TSR of Nokia China.

Could you please provide a solution?

The following are the requirements for jitter attenuator.

This material needs to be cheap.

Key Requirements

Differential or single-ended inputs (up to 312.5MHz)

90fs max RMS jitter@312.5MHz

HCSL/CML output

I2C or SPI interface

-40℃~85℃

Many thanks!

Carol

over 1 year ago

0 Connor Lewis over 1 year ago

TI__Genius 12240 points

Hi Carol,

I have a few questions to understand the customer requirements better:

1. How many 312.5Mhz outputs are needed?

2. Does the input strictly need to be 312.5MHz or can it be some other frequency? Also, where is the input clock coming from?

Based on the system requirements so far I think something like LMK05318B or LMK5B12204 would be the best low-cost solutions. Let me know if one of these could work.

Regards,

Connor

0 Carol Xue over 1 year ago in reply to Connor Lewis

TI__Prodigy 30 points

Hi Connor,

Thanks for your help.

1.Only one outputs.

2.Input up to 312.5MHz.The frequency comes from DPLL.

Regards,

Carol

0 Carol Xue over 1 year ago in reply to Carol Xue

TI__Prodigy 30 points

1.Jitter cleaning，REF clock for 112G SERDES；Input comes from CLOCK generator；Output comes to Switch which has 112G SERDES.

2.The lowest input frequency is 156.25Mhz；312.5M is fixed frequency.

0 Connor Lewis over 1 year ago in reply to Carol Xue

TI__Genius 12240 points

Hi Carol,

I just realized that we already have an email thread for this same question with Lucas and Allen, I will go ahead and close this thread so we can continue this discussion via email.

Regards,

Connor

Clock & timing

Clock & timing forum

Please help provide TI solution ：one jitter attenuator only with one input and one output