DS90CR287: Reset time

NAOKI AOYAMA

Guru 11215 points

Part Number: DS90CR287

Hello,

Our customer use the DS90CR287.

The customer change the frequency of the input clock.

So, the customer will toggle the PWR_DWN pin to reset the PLL.

How long does it take to reset the PLL?

Best Regards,

Naoki Aoyama

over 7 years ago

0 Ikechukwu Anyiam over 7 years ago

TI__Mastermind 35130 points

Hello Naoki-san,

I believe this spec is TPLLS, which is specified as 10ms in the "Transmitter Switching Characteristics" table and Figure 14 of the datasheet.

Regards,
I.K.

0 NAOKI AOYAMA over 7 years ago in reply to Ikechukwu Anyiam

Guru 11215 points

Hello I.K.-san,

Thank you for your reply.
How about the duration of the PWR_DWN Low for reset?
Is it as 100ns?

Regards,
Naoki Aoyama

0 Ikechukwu Anyiam over 7 years ago in reply to NAOKI AOYAMA

TI__Mastermind 35130 points

Hi Naoki-san,

Yes, you are correct.

Regards,
I.K.

0 NAOKI AOYAMA over 7 years ago in reply to Ikechukwu Anyiam

Guru 11215 points

Hi I.K.-san,

Thank you for your fast reply.
I will feedback the customer this information.

Thanks,
Naoki Aoyama

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DS90CR287: Reset time