MAX3984UTE+

The MAX3984 is a single-channel, preemphasis driver with input equalization that operates from 1Gbps to 10.3Gbps. It provides compensation for copper links, such as 8.5Gbps Fibre Channel and 10.3Gbps Ethernet, allowing spans of up to 10m with 24 AWG cable. The driver provides four selectable preemphasis levels, and the selectable input equalizer compensates for up to 10in of FR-4 circuit board material at 10Gbps. The MAX3984 is composed of a receiver, a driver, and an LOS detector with selectable threshold. Equalization is provided in the receiver. Selectable preemphasis and selectable output amplitude are included in the transmitter. The MAX3984 also includes transmit disable control for the output. Data is fed into the MAX3984 through a CML input stage and a selectable equalization stage. The fixed equalizer in the receiver corrects for up to 10in of PCB loss on FR-4 material at 10Gbps. The fixed equalizer can be bypassed by setting the IN_LEV pin to a logic-low. The driver includes four-state preemphasis to compensate for up to 10m of 24 AWG, 100Ω balanced cable, or 30in of FR-4. The OUT_LEV pin selects the output amplitude. When OUT_LEV is low, the peak-to-peak amplitude is 1000mVP-P. When OUT_LEV is high, the peak-to-peak amplitude is 1200mVP-P.

Applications

• 8.5Gbps Fibre Channel Active Cable Assemblies
• 10.3Gbps Ethernet STM-64

Key features

• Drives Up to 10m of 24 AWG Cable
• Drives Up to 30in of FR-4
• Selectable 1000mVP-P or 1200mVP-P Differential Output Swing
• Selectable Output Preemphasis
• Selectable Input Equalization
• LOS Detection with Built-In Squelch
• Transmit Disable
• Hot Pluggable