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PCM2903C: AND gate in PCM 2903C

Part Number: PCM2903C

Hello Sir

I'm using PCM2903C in my project. The typical application circuit mentioned in datasheet contains an AND gate. Why that AND gate is used?

Please help me out in this concern.

Regards

Nidhi P Shetty

  • Hi, Nidhi,

    The AND is used to pull-up D+ signal only when both Vbus and VDD are provided to the device.  As this part is not USB-powered, this method is used to make sure the part is not active until the relevant supplies are stable.

    Best Regards,

      -Diego Meléndez López
       Audio Applications Engineer