SFP Copper-Cable Preemphasis Driver

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 TXDISABLE. 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.

Applications

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

* 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