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Document overview

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Technical content

Features

  • Two 6.5Gbps differential channels
  • Output swing up to 1.2V pk-to-pk
  • SAS, SATA fully supported
  • Adjustable Receiver Equalization - 0 to 16 dB
  • 100Ω Differential CML I/O’s
  • Continuous step output swing adjustment
  • Continuous step output pre-emphasis control
  • Input signal level detect and squelch for each channel
  • OOB fully supported
  • Auto HDD Rate Detection for out swing/emphasis setting
  • Supply Voltage: 1.5V or 3.3V
  • Low Power, 162mW @ 1.5V (600 mV Swing)
  • Stand-by Mode – Power Down State: Current < 56 µA
  • HDD unplug power: 1.5mW
  • Auto Slumber Mode power: 22.5mW typical
  • Industrial Temperature Range -40 to 85°C
  • Packaging: 20-contact TQFN (4x4mm) Pericom Semiconductor’s PI3EQX6801 is a low power, 1.5V/3.3V, 6.5Gbps, SATA/SAS signal ReDriver™. The device provides programmable equalization, to optimize performance over a variety of physical mediums by reducing Inter-Symbol Interference. PI3EQX6801 supports two 100Ω 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 (x_EN#=0) 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. Each lane can be powered-down if x_EN# =1, and when A_EN# and B_EN# are both high, the device enters a low power standby mode. Block Diagram

Applications

n Server n Desktop n Data Storage/Workstation Figure1 Redrivers with emphasis and equalization signal conditioning technology ensure the integrity of high-frequency SAS2.0/SATA3.0 signals by opening closed signal eyes to recover data and meet strict compliance testing requirements. Increased signal margin also supports longer drive lenghts over even low-quality cables ReDriver in Storage Array Application