MAX3801 19-1999 Rev 4 7/04 3.2Gbps Adaptive Equalizer General Description Features The MAX3801 is a +3.3V adaptive cable equalizer Single +3.3V Operation designed for coaxial and twin-axial cable point-to-point Typical Power Dissipation = 125mW at +3.3V communications applications. The equalizer includes differential CML data inputs and outputs, a loss-of-sig- Data Rates Up to 3.2Gbps nal (LOS) output, and a cable integrity monitor (CIM) Equalizer Automatically Adjusts for Different output. Cable Lengths The adaptive cable equalizer is capable of equalizing differential or single-ended signals at data rates up to 0dB to 30dB Equalization at 1.6GHz (3.2Gbps) 3.2Gbps. It automatically adjusts to attenuation caused Loss-of-Signal (LOS) Indicator by skin-effect losses of up to 30dB at 1.6GHz. The equalizer effectively extends the usable length of cop- Cable Integrity Monitor (CIM) per cable in high-frequency interconnect applications. On-Chip Input and Output Terminations The MAX3801 is available in a 24-pin QFN package Low External Component Count with exposed pad and consumes only 125mW at +3.3V. Operating Temperature Range = 0C to +85C Applications ESD Protection on Inputs and Outputs High-Speed Links in Communications and Data Systems Ordering Information Backplane and Interconnect Applications TEMP PIN- PACKAGE SDH/SONET Transmission Equipment PART RANGE PACKAGE CODE MAX3801UGG 0C to +85C 24 QFN G2444-1 MAX3801UTG 0C to +85C 24 Thin QFN T2444-2 MAX3801UTG+ 0C to +85C 24 Thin QFN T2444-2 +Denotes lead-free package. Pin Configuration appears at end of data sheet. Typical Application Circuit +3.3V MAX3801 EIN EOUT +3.3V LOS CIM MAX3801 EOUT EIN LOS CIM THIS SYMBOL INDICATES A CONTROLLED-IMPEDANCE TRANSMISSION LINE. Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com. CARD 1 CARD 23.2Gbps Adaptive Equalizer ABSOLUTE MAXIMUM RATINGS Supply Voltage, V ..............................................-0.5V to +6.0V Operating Ambient Temperature Range ................0C to +85C CC Voltage at LOS, CIM+, CIM-.......................-0.5V to (V + 0.5V) Storage Temperature Range .............................-55C to +150C CC Voltage at EIN+, EIN- .........................(V - 1V) to (V + 0.5V) Lead Temperature (soldering, 10s) .................................+300C CC CC Current Out of EOUT+, EOUT-............................................25mA Continuous Power Dissipation (T = +85C) A 24-Lead QFN-EP (derate 25.1mW/C above +85C) .1630mW 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. DC ELECTRICAL CHARACTERISTICS (V = +3.14V to +3.46V, T = 0C to +85C. Typical values are at V = +3.3V and T = +25C, unless otherwise noted.) CC A CC A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Supply Current I Includes external load current 37 60 mA CC INPUT SPECIFICATIONS M i nim um C abl e Input (D i ffer enti al) 3.2Gbps, 30dB cable loss at 1.6GHz (Note 1) 650 700 MV P-P M axim um C abl e Input ( D i fferenti al ) 1100 mV P-P Input Impedance Single-ended 40 53 62.5 OUTPUT SPECIFICATIONS Output Voltage (Differential) (Note 2) 500 1000 mV P-P Output Impedance Single-ended 50 65 75 V ol tage a t CIM Output (D i fferenti al) V No external load, V = (V ) - (V ) -0.5 +0.5 V CIM CIM CIM+ CIM- P-P Voltage at CIM Output V V CIM+, CC No external load 0.5 V (Single-Ended) V - 0.5 CIM- Output high (Note 3) 2.4 Voltage at LOS V Output low (Note 3) 0.4 Output C om m on-M ode V ol tag e Each output DC-coupled 50 to V V - 0.2 V CC CC 2 MAX3801