CDC5801A: alternative solution

Fred Cheng

Expert 5790 points

Part Number: CDC5801A
Other Parts Discussed in Thread: LMK03318, CDCS503

Hi team,

is there a alternative solution for below part?

I can't find the clock multiplier solution in Ti.com

BTW, don't have to be one output ,but better same as ON's part

ONSM_S_A0011486201_1-2560346.pdf

over 2 years ago

0 vicente flores prado over 2 years ago

TI__Mastermind 29342 points

Hi Fred,
I would need to know what's the input frequency and output frequencies required?

A clock generator or a buffer might be an option here, unfortunately I could not find any of these two options in SOIC package though.

Regards,

Vicente

0 Fred Cheng over 2 years ago in reply to vicente flores prado

TI__Expert 5790 points

Hi Prado,

I'm still waiting for customer 's spec,

could you provide some of the solutions for me to review first? you may start from input frequency 1~50MHz

since I only find one clock multiplier at clock generator section.

or maybe you can show me which catagory I should search for

BTW, SOIC is not necessary.

0 vicente flores prado over 2 years ago in reply to Fred Cheng

TI__Mastermind 29342 points

Hi Fred,
After confirming with the engineer who supports buffer I learned a buffer will not be an optimal solution due to most of our recent buffers not having multipliers.
The most optimal clock generator solution is LMK033118 in this case which is an ultra low jitter clock generator.

Regards,

Vicente

0 Fred Cheng over 2 years ago in reply to vicente flores prado

TI__Expert 5790 points

Hi Prado,

Onsemi use pin mode the adjust multiplier ratio shown below, do we have IC that adopt the similar way ?

also LMK03318 has 10 output which may be over-spec for them,

please help discuss with clock generator or synethizer team for better solution ,

how about

CDCEL913 and CDCS503?

thanks

0 vicente flores prado over 2 years ago in reply to Fred Cheng

TI__Mastermind 29342 points

Hi Fred,
The only potential solution we were able to find is CDCM6100x family.

It doesn't work the the way the competitor part did in terms of how the different pin combinations change the output channel multiplier. Here the pins change the divider value which divides down the VCO frequency.

Here is the link to the device page: https://www.ti.com/product/CDCM61004

Regards,

Vicente

0 Fred Cheng over 2 years ago in reply to vicente flores prado

TI__Expert 5790 points

How about CDCS503 that I found?

+1 vicente flores prado over 2 years ago in reply to Fred Cheng

TI__Mastermind 29342 points

Hi Fred,
The datasheet for CDCS503implies there is only two multiplier options, 2 & 1. In other words, you either multiply the input by 4 or by 1 compared to the ONSemi part that is more flexible in terms of the multiplier options available such as 3, 2.5, 6 etc.

Regards,

Vicente

Clock & timing

Clock & timing forum

CDC5801A: alternative solution

CDCEL913 and CDCS503?