MAX3980

NOT RECOMMENDED FOR NEW DESIGNS

3.125Gbps XAUI Quad Equalizer Achieve Clean 3.125Gbps XAUI Interfaces over 40in Backplanes

Analog Devices MAX3980 Product Info

10 February 2026 6

Features

Four Differential Digital Data "Lanes" at 3.125Gbps
Spans 40in (1.0m) of FR4 PC Board
Receiver Equalization Reduces Intersymbol Interference (ISI)
Low-Power, 175mW per Channel
Standby ModePower-Down State
Single +3.3V Supply
Signal Detect

Part details & applications

The MAX3980 quad equalizer provides compensation for transmission medium losses for four "lanes" of digital NRZ data at a 3.125Gbps data rate in one package. It is tailor-made for 10-Gigabit Ethernet (10GbE) backplane applications requiring attenuation of noise and jitter that occur in communicating from MAC to PMD or from MAC to Switch. In support of the IEEE®-802.3ae for the XAUI interface, the MAX3980 adaptively allows XAUI lanes to reach up to 40in (1.0m) on FR4 board material.

The equalizer has 100Ω differential CML data inputs and outputs.

The MAX3980 is available in a 44-pin exposed-pad QFN package. The MAX3980 consumes only 700mW at +3.3V or 175mW per channel.

Applications

IEEE-802.3ae XAUI Interface (3.125Gbps)
InfiniBand® (2.5Gbps)

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