Data line threshold in HX2LP

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TeMa_2997106
Level 6
Level 6
Distributor - TED (Japan)
10 likes received 10 solutions authored 250 replies posted

What is the voltage value for recognizing High or Low in the following signal, which is the data signal of CY7C65630-56LTXC?
D+
D-
DD+
DD-

My understanding is that these lines are differential signals, so the Vih/Vil given in the datasheet cannot be specified.

Thanks,
Tetsuo

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Takashi_O
Moderator
Moderator
Moderator
10 likes received 250 sign-ins 250 replies posted

Hi @TeMa_2997106,

Thank you for posting into our community.

The RX sensitivity is specified to be met with Template 4 in USB2.0 standard. Please find the following section in the USB2.0 standard.

>7.1.2.2 High-speed Signaling Eye Patterns and Rise and Fall Time

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Takashi_O
Moderator
Moderator
Moderator
10 likes received 250 sign-ins 250 replies posted

Hi @TeMa_2997106,

Thank you for posting into our community.

The RX sensitivity is specified to be met with Template 4 in USB2.0 standard. Please find the following section in the USB2.0 standard.

>7.1.2.2 High-speed Signaling Eye Patterns and Rise and Fall Time

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TeMa_2997106
Level 6
Level 6
Distributor - TED (Japan)
10 likes received 10 solutions authored 250 replies posted

Takashi-san,

Thank you for your quick response.
I will check the specification.

Thanks,
Tetsuo

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