MAX3980 19-2153 Rev 3 12/08 3.125Gbps XAUI Quad Equalizer General Description Features The MAX3980 quad equalizer provides compensation Four Differential Digital Data Lanes at for transmission medium losses for four lanes of digi- 3.125Gbps tal NRZ data at a 3.125Gbps data rate in one package. Spans 40in (1.0m) of FR-4 PC Board It is tailor-made for 10-Gigabit Ethernet (10GbE) back- plane applications requiring attenuation of noise and jit- Receiver Equalization Reduces Intersymbol ter that occur in communicating from MAC to PMD or Interference (ISI) from MAC to Switch. In support of the IEEE-802.3ae for Low-Power, 175mW per Channel the XAUI interface, the MAX3980 adaptively allows XAUI lanes to reach up to 40in (1.0m) on FR-4 board Standby ModePower-Down State material. Single +3.3V Supply The equalizer has 100 differential CML data inputs and outputs. Signal Detect The MAX3980 is available in a 44-pin exposed-pad QFN package. The MAX3980 consumes only 700mW at Ordering Information +3.3V or 175mW per channel. PART TEMP RANGE PIN-PACKAGE Applications MAX3980UGH 0C to +85C 44 QFN-EP* MAX3980UTH+ 0C to +85C 44 TQFN-EP* IEEE-802.3ae XAUI Interface (3.125Gbps) SM +Denotes a lead-free/RoHS-compliant package. InfiniBand (2.5Gbps) *EP = Exposed pad. Pin Configuration appears at end of data sheet. Typical Application Circuit SWITCH CARD LINE CARD PC BOARD BACKPLANE PMD MAC SWITCH 40in (1.0m) 4 4 4 Rx Tx Rx Tx IN OUT Rx 4 x 3.125Gbps MAX3980 4 x +3.3V 10GbE 3.125Gbps SUPPLY +3.3V SUPPLY 4 4 4 Tx Rx Tx Rx Tx OUT IN MAX3980 40in (1.0m) InfiniBand is a trademark and service mark of the InfiniBand Trade Association. Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com. EVALUATION KIT AVAILABLE3.125Gbps XAUI Quad Equalizer ABSOLUTE MAXIMUM RATINGS Supply Voltage, V ..............................................-0.5V to +4.0V Operating Ambient Temperature Range ................0C to +85C CC Voltage at SDET, IN ................................-0.5V to (V + 0.5V) Storage Temperature Range .............................-55C to +150C CC Current Out of OUT .......................................-25mA to +25mA Lead Temperature (soldering, 10s) .................................+300C Continuous Power Dissipation (T = +85C) A 44-Pin QFN-EP (derate 26.3mW/C above +85C)...2105mW Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICS (V = +3.0V to +3.6V, input data rate = 3.125Gbps, T = 0C to +85C. Typical values are at V = +3.3V and T = +25C, unless CC A CC A otherwise noted.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS EN = TTL low 0.25 Supply Power W EN = TTL high 0.7 0.9 10Hz < f < 100Hz 100 Supply Noise Tolerance 100Hz < f < 1MHz 40 mVp-p 1MHz < f < 2.5GHz 10 Signal Detect Assert Input signal level to assert SDET (Note 1) 100 mVp-p Signal Detect Deassert Input signal level to deassert SDET (Note 1) 30 mVp-p Signal Detect Delay 10 s Latency From input to output 0.32 ns CML RECEIVER INPUT XAUI transmitter output measured Input Voltage Swing differentially at point A, Figure 1, using 200 800 mVp-p K28.5 pattern Return Loss 100MHz to 2.5GHz 12 dB Input Resistance Differential 80 100 120 EQUALIZATION Total jitter (Note 2) 0.3 Residual Jitter UIp-p Deterministic jitter 0.2 Random Jitter (Note 2) 1.5 ps RMS CML TRANSMITTER OUTPUT (into 100 1) Output Voltage Swing Differential swing 550 850 mVp-p Common-Mode Voltage V - 0.3 V CC Transition Time t , t 20% to 80% (Note 3) 60 130 ps f r Difference in 50% crossing between OUT + Differential Skew 12 ps and OUT - Output Resistance Single ended 40 50 60 2 MAX3980