Pericom PI3EQX774xST 1- & 2-port USB 3.0 ReDrivers™ are low power, high performance 5.0Gbps signal ReDrivers™ designed specifically for the USB 3.0 protocol. These devices provide programmable equalization, De-Emphasis, and input threshold controls to optimize performance over a variety of physical mediums by reducing Inter-Symbol Interference. Pericom PI3EQX774xST 1- & 2-port USB 3.0 ReDrivers™ support two (PI3EQX7741ST) or four (PI3EQX7742ST) 100Ω Differential CML data I/O's between the Protocol ASIC to a switch fabric, over cable, or to extend the signals across other distant data pathways on the user's platform. The integrated equalization circuitry provides flexibility with signal integrity of the signal before the ReDriver. A low-level input signal detection and output squelch function is provided for each channel, and each channel operates fully independently.
When the channels are enabled EN_x# = 0 and operating, that channel's input signal level (on xI+/-) determines whether the output is active. If the input signal level of the channel falls below the active threshold level (Vth-) then the outputs are driven to the common mode voltage. In addition to signal conditioning, when EN_x# =1, the device enters a low power standby mode. Pericom PI3EQX774xST 1- & 2-port USB 3.0 ReDrivers™ also include a fully programmable receiver detect function. When the RxDet pin is pulled high, automatic receiver detection will be active. The PI3EQX7742ST will then move to power down due to inactivity. For the PI3EQX7741ST, the receiver detection loop will be active again if the corresponding channel's signal detector is idle for longer than 25mS. The channel will then move to Unplug Mode if load not detected, or it will return to Low Power Mode (Slumber Mode) due to inactivity.
