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MAX3987：8.5Gbps Quad Equalizer and Preemphasis Driver

Best-in-Class Redriver Can Equalize 25in to 30in of FR4

The MAX3987 is a 4-channel receive and transmit equalizer (EQ). It compensates for transmission medium losses encountered with FR4 stripline/microstrip and/or high-speed cable. The device can be used at the beginning, middle, or end of a channel. The input equalization requires no setting, and the output preemphasis (PE) is programmable. For each channel, the preemphasis level, output drive level, output polarity, and powering down of unused outputs are programmable through an I²C serial interface. It can also be configured globally through pins. The device operates from a 2.5V or 3.3V supply, and is packaged in a 7mm x 7mm, 48-pin TQFN.

Key Features Up to 8.5 NRZ Data Speed Receive Equalization Up to 30in FR4 Preemphasis Drive Up to 30in FR4 Global and Individual Programming of Preemphasis, Output Drive Levels, Polarity Inversion, and Offset Cancellation Signal Detect and Internal Output Squelch Compliant with SAS-2 and SATA Revision 3 OOB Coding Independent, 8B/10B, 64B/66B, Scrambled, and Others Differential CML Data-Output Drive I²C Serial Interface and Pin Programmable Software Power-Down of Unused Outputs 0.5W Typical Power Dissipation for Drive Level 1 at VCC = 2.5V High-Performance, Lead-Free, 7mm x 7mm, 48-Pin TQFN Package

MAX3987: Typical Application Circuit Applications/Uses FR4 and Cable Equalization PCIe® Compatible Preemphasis and Receive Equalization Redrive XAUI and XAUI2, Fibre Channel, Interlaken, InfiniBandTM/SM, SAS-2 and SATA Revision 3 OOB

DataSheet

Parametrics

Design kits & evaluation modules

• MAX3987EVKIT

Quality and Environmental Data

• MAX3987.pdf

Ordering Information