The MAX3981 quad equalizer provides compensation for transmission medium losses for four "lanes" of digital NRZ data at a data rate of 3.125Gbps in one package. It is tailor-made for 10Gigabit Ethernet applications that require attenuation of noise and jitter that occur in communicating with chassis-to-chassis interconnect. In support of IEEE-802.3ae for the XAUI interface, the MAX3981 adaptively allows XAUI lanes to reach 10m (33ft) with inexpensive twin-axial cable for extended backplane applications. The equalizer has 100Ω differential CML data inputs and outputs. The MAX3981 is available in a 44-pin exposed-pad QFN package. The MAX3981 consumes only 700mW at 3.3V or 175mW per channel. Applications * IEEE-802.3ae XAUI Interface (3.125Gbps) * InfiniBand® (2.5Gbps) * Four Differential Digital Data "Lanes" at 3.125Gbps * Span 10m (33ft) of Twin-Axial Cable * Receiver Equalization Reduces Intersymbol Interference (ISI) * Low Power, 175mW per Channel * Standby Mode—Power-Down State * Single 3.3V Supply * Signal Detect