LMK04616EVM: LMK04616EVM and CDCLVP1216EVM. No footprint availability on Evaluation boards for placements of Termination requirements mentioned in Datasheets for LVPEVL.

Muhammad Ali Imran

Part Number: LMK04616EVM
Other Parts Discussed in Thread: LMK04616, CDCLVP1216EVM

Please look at the attached diagram/snapshot I have attached, I want to connect LMK04616 board’s output clock as a source to CDCLVP1216EVM. But LMK04616 datasheet said that HSDS 8mA output requires a termination on the receiver side. In this case (CDCLVP1216EVM) which doesn’t have the footprints available on the board to populate those terminations. Please see the attached images from both devices’ datasheets.

LMK04616 data sheet page number 34 (Figure 30)

https://www.ti.com/lit/ds/symlink/lmk04616.pdf?ts=1700670167231&ref_url=https%253A%252F%252Fwww.ti.com%252Fproduct%252FLMK04616

CDCLVP1216EVM User's Guide page 4

https://www.ti.com/lit/ug/scau029/scau029.pdf?ts=1700814098952&ref_url=https%253A%252F%252Fwww.ti.com%252Ftool%252FCDCLVP1216EVM

I want to make a clock tree out of it without crosstalk, reflections, or EMI, so in my opinion I would need to have a properly terminated connections in between the devices.

Case reference : CS2095431: Integrating LMK04616 and CDCELVP1216 Evaluation Boards

Looking forward to your response

regards

over 1 year ago

+1 Kadeem Samuel over 1 year ago

TI__Genius 16880 points

Muhammad,

The team is currently out for the Thanksgiving holiday. Please expect a response by Monday (PST) for any further queries.

Thanks,

Kadeem

+1 Derek Payne over 1 year ago

TI__Mastermind 31310 points

The receiver termination on the CDCLVP1216EVM is comprised of R154, R155, and C135 on IN0, and R152, R153, and C136 on IN1.

This is exactly the termination suggested in Figure 29 of the LMK04616 datasheet, specifically recommended for HSDS to LVPECL receivers. AC-couple the HSDS 8mA signal from LMK04616 to CDCLVP1216EVM with these components populated, and you'll satisfy the receiver termination requirements.

0 Muhammad Ali Imran over 1 year ago in reply to Derek Payne

Prodigy 10 points

Hi Derek Payne

Thank you for pointing it out , I was wondering if it is the one mentioned in Figure 30. but yes you are right

Because of the holidays, TI E2E™ design support forum responses will be delayed from Dec. 25 through Jan. 2. Thank you for your patience.

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LMK04616EVM: LMK04616EVM and CDCLVP1216EVM. No footprint availability on Evaluation boards for placements of Termination requirements mentioned in Datasheets for LVPEVL.