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TS3USB221: #OE pin question

Part Number: TS3USB221

Hello,

May i know what's the design purpose of the #OE pin, is it only used to power down the device and save the power consumption?

For example: should we control the #OE to pull high and disable the device before switch the D+/- between each channel (1D+/- <--> 2D+/- )?

Thank you.