Clock output interruption with CY2305SXI-1H during cold temperature power ON

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collstep
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Hi,

We use CY2305SXI-1H on a design where we are receiving back for several customer defect reports during start-up at low temperature (lower than 10°C). After deep investigation on the design, we have probably found a defect root cause which is clock output interruption even after the stabilization of 1 ms after a clock shift on the fly.

As you will see in the scope snapshot hereunder :

 -Yellow signal is the end of the 1 ms delay (go low when timer is elapsed) ;

- Cyan signal is the clock input (switching from 8,33 MHz to 100 MHz) at the beginning of the 1ms delay ;

- Magenta is one clock output. As we can seen we observe multiple clock interruptions even after 1ms of stabilization during power ON at low ambient temperature (lower than 10°C). Important to notice that this anomaly is not observable on all devices (probably less than 5 % but not fully characterized as per today).

collstep_0-1635955186659.jpeg

Did you receive such equivalent user's feedback ?

Could you help us to investigate on which factor it could be linked ? Could it be linked to manufacturing issues linked to some component  ?

Thanks in advance for your technical support.

Best regards,

Stephan COLLE

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1 Solution
Ritwick_S
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100 solutions authored 25 likes received 250 sign-ins

Hi @collstep ,

 

As this anomaly is not observed on all devices, I suggest you kindly create mycase of the "Failure Analysis" type.

 

Thanks,

Ritwick

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2 Replies
Ritwick_S
Moderator
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100 solutions authored 25 likes received 250 sign-ins

Hi @collstep ,

 

As this anomaly is not observed on all devices, I suggest you kindly create mycase of the "Failure Analysis" type.

 

Thanks,

Ritwick

The case #00672688 is submitted.

Thanks,

Stephan

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