The AT43312A is a 5 port USB hub chip supporting one upstream and four down- stream ports. The AT43312A connects to an upstream hub or Host/Root Hub via Port0 and the other ports connect to external downstream USB devices. The hub re-trans- mits the USB differential signal between Port0 and Ports[1:4] in both directions. A USB hub with the AT43312A CAN operate as a bus-powered or self-powered through chip power mode configuration pin. In the self-powered mode, port power CAN be switched or unswitched. Overcurrent reporting and port power control CAN be individual or glo- bal. An on-chip power supply eliminates the need for an external 3.3V supply. The AT43312A supports the 12-Mb/sec full speed as well as 1.5-Mb/sec slow speed USB transactions. To reduce EMI the AT43312As Oscillator freuency is 6 MHz even though some internal circuitry operates at 48 MHz. By ATMEL Corporation
AT43312A 's PackagesAT43312A 's pdf datasheet

AT43312A Pinout, Pinouts
AT43312A pinout,Pin out
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