Diodes Incorporated

PI3EQX4951ST (Obsolete)

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Product Description

Pericom Semiconductor’s PI3EQX4951ST is a low power, signal ReDriver. The device provides programmable equalization, to optimize performance over a variety of physical mediums by reducing Inter-Symbol Interference. PI3EQX4951ST supports two 100W Differential CML data I/O’s between the Protocol ASIC to a switch fabric, across a backplane, 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. Each channel operates fully independently. When the channels are enabled (EN=1) and operating, that channels 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 = 0, the device enters a low power standby mode.


  • SATA2 i/m; external SATA2
  • Two 3.0Gbps differential signal pairs
  • Independent Digital Output Emphasis Control
  • 100W Differential CML I/O’s
  • Input signal level detect and squelch for each channel
  • OOB Support
  • Enhanced Mode Features:
    • Adjustable Receiver Equalization
    • Independent Analog Output Emphasis Control
  • High impedance I/O termination in standby mode
  • Low Power Operation: 300mW typical
  • Auto-Slumber Mode: 33mW typical
  • Power down Stand-by Mode: 0.1mW
  • Supply Voltage: 3.3V ±10%
  • Packaging: 20-TQFN (4x4mm)

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