DS90C385A: Spread Spectrum for DS90C385A

Satoshi Yoshida

Prodigy 660 points

Part Number: DS90C385A

Hi team,

Could you please support the questions about spread spectrum for DS90C385A as below?

Is triangular modulation acceptable as spread spectrum for DS90C385A?

Do you have any recommendation as spread spectrum clock buffer in TI portfolio (CDCxxx) suitable for DS90C385A?

Please let me know if you have any concern or advice to replace from THC63LVDM83D(THine) to DS90C385A.

e.g. compatibility to Rx device from THine (THC63LVDF84C??? in LCD module)

Regards,

Satoshi

over 6 years ago

0 Ikechukwu Anyiam over 6 years ago

TI__Mastermind 35130 points

Hi Satoshi-san,

Triangular modulation is acceptable, and there should be no compatibility issues with the THC63LVDF84C as long as the frequency is within specification.

For CDCxxx part number recommendations you should check with the clocking team.

Regards,
I.K.

0 Satoshi Yoshida over 6 years ago in reply to Ikechukwu Anyiam

TI__Prodigy 660 points

I.K. -san,
Please allow me to ask an additional question.
When applying spread spectrum, are there any points of concern to timing specifications?
(e.g. Figuire.7 "DS90C385A (Transmitter) Setup/Hold and High/Low Times with R_FB pin = GND (Falling Edge Strobe)" on the datasheet)

Regards,
Satoshi

0 Ikechukwu Anyiam over 6 years ago in reply to Satoshi Yoshida

TI__Mastermind 35130 points

Hi Satoshi-san,

As long as the parameters in the Transmitter Switching Characteristics table are met they should be okay.

Regards,
I.K.

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DS90C385A: Spread Spectrum for DS90C385A