Clock fail detection for 20 kHz clock?

Sara Slater

Other Parts Discussed in Thread: CDCE62005

Hello,

I have a 20 kHz, 5 V reference clock in the feedback loop of a motion control system. I need to detect a clock failure so that motion can be disabled in that case. All the IC's I've found that can do this work only for MHz clocks, and similarly for all clock frequency multipliers I've seen. Does anyone know of a clock failure detector, or a frequency multiplier, that will work for a 20 kHz clock?

Thanks very much,

Sara

over 15 years ago

0 Sid over 15 years ago

Genius 4530 points

Hi Sara,

Which clock ICs have you referred?

Because most clock synthesizers, afaik, have upper limit in MHz, but they can operate as frequency multipliers/ synthesizers for Khz inputs too. Have you tried CDCE62005 and other multipliers/synthesizers from CDCE/CDCM series?

Regards,

Sid

0 Sara Slater over 15 years ago in reply to Sid

Prodigy 20 points

Hi Sid,

Indeed, it looks like the CDCE 706 or 906 in PLL bypass mode might work for my application, though I need to do some more reading first. Thanks for your help!

-Sara

Clock & timing

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Clock fail detection for 20 kHz clock?