MAX3981

www.DataSheet4U.com 21-2178; Rev 1; 5/03 3.125Gbps XAUI Quad Cable Equalizer General Description 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. Features ♦ 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 MAX3981 Applications IEEE–802.3ae XAUI Interface (3.125Gbps) InfiniBand (2.5Gbps) PART MAX3981UGH Ordering Information TEMP RANGE 0°C to +85°C PINPACKAGE 44 QFN PACKAGE CODE G4477-1 Pin Configuration appears at end of data sheet. Typical Operating Circuit LINE CARD SWITCH CARD PMD MAC SWITCH Rx Tx 4 Rx Tx 4 x 3.125Gbps 4 IN MAX3981 3.3V SUPPLY OUT 4 Rx 10GbE 3.3V SUPPLY 4 4 Tx Rx Tx Rx OUT MAX3981 IN 10m (3...