Dual Equalized 1.5/3.0/6.0GT/s SAS/SATA Redriver

Ultra-Small Equalizer/Redriver Supports SAS Data Rates Up to 6.0GT/s (Gigatransfers per Second)
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Status Explanations for product status codes

Active: In Production.


The MAX4952A dual-channel redriver is designed to redrive one full lane of SAS or SATA signals up to 6.0GT/s (gigatransfers per second) and operates from a single +3.3V supply.

The MAX4952A features independent input equalization and output preemphasis. The MAX4952A enhances signal integrity at the receiver by equalizing the signal at the input and establishing preemphasis at the output of the device. SAS and SATA OOB (Out-of-Band) signaling is supported using high-speed amplitude detection on the inputs and squelch on the corresponding outputs.

Inputs and outputs are all internally 50Ω terminated and must be AC-coupled to the SAS/SATA controller IC and SAS/SATA device.

The MAX4952A is available in a small 28-pin, 3.5mm x 5.5mm TQFN package with flowthrough traces for ease of layout. This device is specified over the 0°C to +70°C operating temperature range.

Data Sheet

Download this datasheet in PDF formatDownload Rev 0 (PDF, 611.6kB)
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An evaluation board is available: MAX4952AEVKIT

Key Features

  • Single +3.3V Supply Operation
  • SAS Gen I/II Up to 6.0GT/s
  • Excellent Return Loss
    • 8dB at 3.0GT/s
  • Supports SAS/SATA OOB (Out-of-Band) Signaling Very Fast Entry and Exit Time
    • 5ns (typ)
  • Internal Input/Output 50Ω Termination Resistors
  • Selectable Input Equalization
    • 0, 3dB
  • Standard 1000mVP-P (typ) Output
  • Selectable Output Preemphasis
    • 0, 3dB
  • Inline Signal Traces for Flowthrough Layout
  • Space-Saving, 3.5mm x 5.5mm TQFN Package


  • Data Storage/Work Stations
  • Docking Stations
  • Servers

Key Specifications:

Repeaters and Buffers (SAS, SATA, PCIe, USB)
Part Number Functions Interface Data Rate
Channels Oper. Temp.
max typ See Notes
MAX4952A  Equalizer/Re-Driver
6000 3.3 140 2 0 to +70 $9.18 @1k
See All Repeaters and Buffers (SAS, SATA, PCIe, USB) (21)

Pricing Notes:

This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.


MAX4952A: Typical Application Circuit
Typical Application Circuit

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Information Index

Document Ref.: 19-4575 Rev 0; 2009-07-07
This page last modified: 2012-02-28