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 FR-4 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.
The MAX3980 is a quad equalizer that compensates transmission‑line losses for four 3.125 Gbps XAUI lanes. It is designed for 10‑Gigabit Ethernet back‑plane applications and provides adaptive equalization, low‑power standby mode, and signal‑detect functionality.
The document lists absolute maximum ratings, typical electrical characteristics, pin descriptions, functional diagrams, layout recommendations, and package information. It also includes application guidance such as standby operation, signal‑detect behavior, and recommended CML interfacing components.
| Supply Power (EN=TTL low) | 0.25 W |
|---|---|
| Low‑Power per Channel (standby) | 175 mW |
| Input High Voltage (TTL control pins) | 2.0 V |
The standby mode consumes 175 mW per channel.
It provides four differential CML data lanes.
It can span up to 40 in (1 m) of FR‑4 board.
The device operates from a single +3.3 V supply.