TLK10034: recommended oscillator for REFCLK?

Andrew Dyer

Part Number: TLK10034
Other Parts Discussed in Thread: LMK61A2-312M

The requirements in the TLK10034 datasheet for REFCLK say the source needs a rise/fall time of 350ps max. for 10-90% swing. This seems hard to find.

Does TI have a recommended oscillator to go with TLK10034?

over 4 years ago

0 Rodrigo Natal over 4 years ago

TI__Mastermind 19225 points

Hi,

You may evaluate the clock sources below:

www.ti.com/.../CDC421A312

https://www.digikey.com/product-detail/en/epson/EG-2121CA-312.5000M-LHPAB/EG-2121CA312.5000M-LHPAB-ND/1212405

Cordially,

Rodrigo Natal

HSSC Applications Engineer

0 Andrew Dyer over 4 years ago in reply to Rodrigo Natal

Intellectual 640 points

Thanks for the suggestions. We are using a 3.3V part currently in a 6 pin 7mm x 5mm package and were hoping for a drop-in replacement and prefer industrial temp. I came across the following

TI LMK61A2-312M http://www.ti.com/lit/ds/symlink/lmk61a2-312m.pdf?&ts=1590007641878 (who knew TI made oscillators? :-)

Epson SG7050VAN https://support.epson.biz/td/api/doc_check.php?dl=brief_SG7050VAN&lang=en

which looks like it would work better for us. Could you comment on these two, please?

We currently use 156.25MHz, does the 312.50MHz give better performance in general?

0 Rodrigo Natal over 4 years ago in reply to Andrew Dyer

TI__Mastermind 19225 points

The TI part number outputs much higher precision clock signal with very low jitter and fast rise/fall times. The Epson part has slower edges and slightly higher jitter, but the cost is lower.

Regards,

Rodrigo

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TLK10034: recommended oscillator for REFCLK?