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USB Hosts Hubs Transceivers

NoAr_1540581
Visitor II

Hello

Description of "drive level 600 uW" of the 12 MHz crystal oscillator in the data sheet.
How should we interpret this value? Is there a basis for the description of "Drive Level: 600 uW" in the BOM list below?
>CRYSTAL 12.000 MHZ 20 PF 49 US (Drive Level: 600 uW, Tolerance: +/- 50 ppm) ---   ECS-120-20-4 ----

Best Regards

Arai

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1 Solution
HirotakaT_91
Moderator
Moderator

We have been recommending to use high drive level (600-μW) crystal on AN72332.

The value of 600-μW has a margin and ECS-120-20-4 which has maximum 500-μW can work without any problems.

The important point is that Power dissipation < drive level formula is established.

Best regards,

Hirotaka Takayama

View solution in original post

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4 Replies
HirotakaT_91
Moderator
Moderator

Hi Arai-san,

Crystal drivel level is the power that is driven into the crystal.

For more information, kindly refer to "3.2.1 Crystal Drive Level" on AN72332.

Best regards,

Hirotaka Takayama

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NoAr_1540581
Visitor II

CY4608で使用されている、ECS-120-20-4の水晶自体のドライブレベルが 最大で0.5mWと記載されている為、

AN72332に記載されている”600-μW minimum drive level”との関連付けについてご説明頂けませんでしょうか?

Macnica/Arai

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HirotakaT_91
Moderator
Moderator

We have been recommending to use high drive level (600-μW) crystal on AN72332.

The value of 600-μW has a margin and ECS-120-20-4 which has maximum 500-μW can work without any problems.

The important point is that Power dissipation < drive level formula is established.

Best regards,

Hirotaka Takayama

View solution in original post

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NoAr_1540581
Visitor II

有難うございました

解決しました

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