SFP Copper-Cable Preemphasis Driver

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The MAX3982 is a single-channel, copper-cable preemphasis driver that operates from 1Gbps to 4.25Gbps. It provides compensation for copper links, such as 4.25Gbps Fibre Channel, allowing spans of up to 15m with 24AWG. The cable driver provides four selectable preemphasis levels. The input compensates for up to 10in of FR4 circuit board material at 4.25Gbps.

The MAX3982 also features SFP-compliant loss-of-signal detection with selectable sensitivity and TX_DISABLE. Selectable output swing reduces EMI and power consumption. It is packaged in a 3mm x 3mm, 16-pin thin QFN and operates from 0°C to +85°C temperature range.
MAX3982: Typical Operating Circuit MAX3982: Typical Operating Circuit Enlarge+

Key Features

  • Drives Up to 15m with 24AWG Cable
  • Drives Up to 30in of FR4
  • 0.25W Total Power with +3.3V Supply
  • Selectable 1600mVP-P or 1200mVP-P Differential Output Swing
  • Selectable Output Preemphasis
  • Fixed Input Equalization
  • Loss-of-Signal Detection with Selectable Sensitivity
  • Transmit Disable


  • 1.0625Gbps, 2.125Gbps, and 4.25Gbps Fibre Channel
  • 1.25Gbps Ethernet
  • 2.488Gbps STM16
  • Backplanes
  • InfiniBand™
  • PCI Express®
  • SFP Active Copper-Cable Assemblies

MAX3982EVKIT: Evaluation Kit for the MAX3982
Product Reliability Reports: MAX3982.pdf 
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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