MAX3872 19-2709 Rev 3 2/07 Multirate Clock and Data Recovery with Limiting Amplifier General Description Features The MAX3872 is a compact, multirate clock and data Multirate Data Input: 2.667Gbps (FEC), 2.488Gbps, recovery with limiting amplifier for OC-3, OC-12, OC-24, 1.244Gbps, 622.08Mbps, 155.52Mbps, OC-48, OC-48 with FEC SONET/SDH and Gigabit 1.25Gbps/2.5Gbps (Ethernet) Ethernet (1.25Gbps/2.5Gbps) applications. Without using Reference Clock Not Required for Data an external reference clock, the fully integrated phase- Acquisition locked loop (PLL) recovers a synchronous clock signal Exceeds ANSI, ITU, and Bellcore SONET/SDH from the serial NRZ data input. The input data is then Jitter Specifications retimed by the recovered clock, providing a clean data output. An additional serial input (SLBI) is available for 2.7mUI Jitter Generation RMS system loopback diagnostic testing. Alternatively, this 10mV Input Sensitivity Without Threshold P-P input can be connected to a reference clock to maintain a Adjust valid clock output in the absence of data transitions. The 0.65UI High-Frequency Jitter Tolerance P-P device also includes a loss-of-lock (LOL) output. 170mV Input Threshold Adjust Range The MAX3872 contains a vertical threshold control to compensate for optical noise due to EDFAs in DWDM Clock Holdover Capability Using Frequency- transmission systems. The recovered data and clock Selectable Reference Clock outputs are CML with on-chip 50 back termination on Serial Loopback Input Available for System each line. Its jitter performance exceeds all Diagnostic Testing SONET/SDH specifications. Loss-of-Lock (LOL) Indicator The MAX3872 operates from a single +3.3V supply and typically consumes 580mW. It is available in a 5mm x 5mm 32-pin thin QFN with exposed-pad package and operates over a -40C to +85C temperature range. Applications Ordering Information SONET/SDH Receivers and Regenerators PKG PART TEMP RANGE PIN-PACKAGE CODE Add/Drop Multiplexers MAX3872EGJ -40C to +85C 32 QFN-EP* G3255-1 Digital Cross-Connects MAX3872ETJ+ -40C to +85C 32 TQFN-EP* T3255-3 SONET/SDH Test Equipment *EP = Exposed pad. DWDM Transmission Systems +Denotes lead-free package. Access Networks Pin Configuration appears at end of data sheet. Typical Application Circuit +3.3V +3.3V CAZ 0.1F C FIL +3.3V +3.3V 0.82F V CC FIL VCC VCO CAZ- CAZ+ FREFSET V CC FILTER OUT+ SDI+ MAX3745 SDO+ SDI- OUT- CML SDO- IN SLBI+ GND MAX3872 SCLKO+ SLBI- CML SCLKO- +3.3V V CTRL V REF SYSTEM SIS LREF LOL RS1 RS2 RATESET GND LOOPBACK DATA +3.3V 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. EVALUATION KIT AVAILABLEMultirate Clock and Data Recovery with Limiting Amplifier ABSOLUTE MAXIMUM RATINGS Supply Voltage, V ..............................................-0.5V to +5.0V Continuous Power Dissipation (T = +85C) CC A Input Voltage Levels 32-Pin QFN (derate 21.3mW/C above +85C) .........1384mW (SDI+, SDI-, SLBI+, SLBI-) ..........(V - 1.0V) to (V + 0.5V) Operating Junction Temperature Range...........-55C to +150C CC CC Input Current Levels Storage Temperature Range .............................-55C to +150C (SDI+, SDI-, SLBI+, SLBI-)............................................20mA Processing Temperature (die) .........................................+400C CML Output Current Lead Temperature (soldering, 10s) .................................+300C (SDO+, SDO-, SCLKO+, SCLKO-) ...............................22mA Voltage at LOL, LREF, SIS, FIL, RATESET, FREFSET, RS1, RS2, V , V , CAZ+, CAZ-......................-0.5V to (V + 0.5V) CTRL REF CC 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 = +3.0V to +3.6V, T = -40C to +85C. Typical values at V = +3.3V, T = +25C, unless otherwise noted.) (Note 1) CC A CC A PARAMETER SYMB O L CONDITIONS MINTYPMAXUNITS Supply Current I (Note 2) 175 215 mA CC INPUT SPECIFICATIONS (SDI, SLBI) Single-Ended Input Voltage V V CC CC V Figure 1 V IS Range - 0.8 + 0.4 V CC Input Common-Mode Voltage Figure 1 V V CC - 0.4 Input Termination to V R 42.5 50 57.5 CC IN THRESHOLD-SETTING SPECIFICATIONS (SDI) Differential Input Voltage Range Threshold adjust enabled 50 600 mV P-P (SDI) Threshold Adjustment Range V Figure 2 -170 +170 mV TH Threshold Control Voltage V Figure 2 (Note 3) 0.3 2.1 V CTRL Threshold Control Linearity 5% Threshold Setting Accuracy Figure 2 -18 +18 mV 15mV V 80mV -6 +6 TH Threshold Setting Stability mV 80mV < V 170mV -12 +12 TH Maximum Input Current I -10 +10 A CTRL Reference Voltage Output V 2.14 2.2 2.24 V REF CML OUTPUT SPECIFICATIONS (SDO, SCLKO) CML Differential Output Swing (Note 4) 600 800 1000 mV P-P CML Differential Output R 85 100 115 O Impedance CML Output Common-Mode V CC (Note 4) V Voltage - 0.2 2 MAX3872