SATA I/II Bidirectional Redriver with High ESD and Cable Detect

Dual-Channel Buffer Allows System to Support SATA Gen III Data Rates Over Long Cables and Through Connector
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Active: In Production.


The MAX4951AE dual-channel buffer is designed to redrive serial-ATA (SATA) I and SATA II signals and can survive ESD events up to ±8kV Human Body Model (HBM). The MAX4951AE can be placed near an eSATA connector to overcome board losses and produce an eSATA-compliant signal level. This device is Serial ATA Revision 2.6 (gold standard)-compliant, while overcoming losses in the PCB and eSATA connector.

The MAX4951AE features low standby current for power-sensitive applications. This device features hardware SATA-drive cable detection, keeping the power low in standby mode.

The MAX4951AE preserves signal integrity at the receiver by reestablishing full output levels. It reduces the total system jitter (TJ) by squaring up the signal and providing excellent return loss match to the source. This device features channel-independent digital boost controls to drive SATA outputs over normal trace lengths and eSATA connector. SATA Out-Of-Band (OOB) 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.

The MAX4951AE operates from a single +3.3V (typ) supply and is available in a small, 4mm x 4mm, TQFN package with flow-through traces for ease of layout. This device is specified over the 0°C to +70°C operating temperature range.

Data Sheet

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An evaluation board is available: MAX4951AEEVKIT

Key Features

  • Single +3.3V (typ) Supply Operation
  • Low-Power, 350µA (typ) eSATA Cable Detect
  • Supports SATA 1.5Gbps and 3.0Gbps Data Rates
  • Meets SATA I, SATA II Input/Output-Return Loss Mask
  • Exceeds eSATA Standard Compliant Eye Mask for Jitter
  • Meets or Exceeds eSATA Standard Compliant Eye Mask for Output Levels
  • Supports SATA OOB Signaling
  • Internal Input/Output 50Ω Termination Resistors
  • Inline Signal Traces for Flow-Through Layout
  • Pin Compatible with MAX4951
  • Space-Saving, 4mm x 4mm, TQFN Package
  • ESD Protection on All Pins: ±8kV (HBM)


  • Laptop Computers
  • Docking Stations
  • Desktop Computers
  • Servers
  • Data Storage/Work Stations

Key Specifications:

Repeaters and Buffers (SAS, SATA, PCIe, USB)
Part Number Functions Interface Data Rate
Channels Oper. Temp.
max typ See Notes
MAX4951AE  Re-Driver SATA 6000 3.3 70 2 0 to +70 $2.40 @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.


SATA I/SATA II Redriver Features Cable Detect and ±8kV ESD Protection
SATA I/SATA II Redriver Features Cable Detect and ±8kV ESD Protection

More Information

New Product Press Release   2010-01-06 ]

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Information Index

Document Ref.: 19-4812 Rev 0; 2009-08-11
This page last modified: 2012-02-28