1 Reply Latest reply on May 4, 2011 12:18 PM by phaedo.ding

    Confusion about the pinmap of CY7C68003

    phaedo.ding

      Hi Experts,

         

      I'm using the USB transceiver CY7C68003. In the datasheet, we can see that there's some difference for the pin order between the two type of package for this device.

         

      24-Pin QFN: counter-clockwise, DATA[0], DATA[1] ... DATA[7]; DP, DM.

         

      20-Ball WLCSP: counter-clockwise, DATA[7], DATA[6] ... DATA[0]; DM, DP.

         

      Who can tell me why there's such a difference pin order between the two type of package?

         

      Does Cypress suggest that when using the 24-Pin QFN package, put it on the same side on the PCB with the MCU, and when using the 20-Ball WLCSP package, put it on the opposite side on the PCB with the MCU?

         

      Any help will be appreciated!

         

      Phaedo Ding