MAX3840 19-1854 Rev 5 9/07 +3.3V, 2.7Gbps Dual 2 2 Crosspoint Switch General Description Features The MAX3840 is a dual 2 2 asynchronous crosspoint Single +3.3V Supply switch for SDH/SONET DWDM and other high-speed 460mW Power Consumption data switching applications where serial data stream loop-through and protection channel switching are 2ps Random Jitter RMS required. It is ideal for OC-48 systems with forward 7ps Deterministic Jitter P-P error correction. A high-bandwidth, fully differential sig- nal path minimizes jitter accumulation, crosstalk, and Power-Down Feature for Deselected Outputs signal skew. Each 2 2 crosspoint switch can fan out CML Inputs/Outputs and/or multiplex up to 2.7Gbps data and 2.7GHz clock signals. All inputs and outputs are current mode logic 6ps Channel-to-Channel Skew (CML) compatible and easily adaptable to interface 100ps Output Edge Speed with an AC-coupled LVPECL signal. When not used, each CML output stage can be powered down with an 5mm 5mm 32 QFN or Thin QFN Package enable control to conserve power. The typical power consumption is 460mW with all outputs enabled. The MAX3840 is compatible with the MAX3876 2.5Gbps clock and data recovery (CDR) circuit. Ordering Information The MAX3840 is available in a 32-pin exposed-pad QFN package (5mm 5mm footprint) and operates PIN - PKG PART TEMP RANGE from a +3.3V supply over a temperature range of -40C PAC K A G E C O D E to +85C. MAX3840ETJ+ -40C to +85C 32 TQFN T3255-3 Applications MAX3840EGJ -40C to +85C 32 QFN G3255-1 SDH/SONET and DWDM Transport Systems +Denotes a lead-free package. Add-Drop Multiplexers ATM Switch Cores WDM Cross-Connects Pin Configurations appear at end of data sheet. High-Speed Backplanes Typical Application Circuit VCC = +3.3V DATA MAX3869 MAX3866 MAX3876 LASER TIA AND LA CDR DRIVER CLOCK MAX3840 MAX3869 CROSSPOINT DATA MAX3866 MAX3876 SWITCH LASER TIA AND LA CDR DRIVER CLOCK Z = 50 TRANSMISSION LINE O 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. +3.3V, 2.7Gbps Dual 2 2 Crosspoint Switch ABSOLUTE MAXIMUM RATINGS Supply Voltage, V .............................................-0.5V to +5.0V 32-Pin QFN CC Input Voltage (CML) .........................(VCC - 1.0) to (V + 0.5V) (derate 21.3mW/C above +85C).................................1.38W CC TTL Control Input Voltage...........................-0.5V to (V + 0.5V) Operating Temperature Range ...........................-40C to +85C CC Output Currents (CML) .......................................................22mA Operating Junction Temperature Range...........-55C to +150C Continuous Power Dissipation (T = +85C) Storage Temperature Range .............................-65C to +160C A 32-Pin TQFN Lead Temperature (soldering, 10s) .................................+300C (derate 21.3mW/C above +85C).................................1.38W 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 are at V = +3.3V, T = +25C, unless otherwise noted.) CC A CC A MIN TYP MAX PARAMETER SYMBOL CONDITIONS UNITS 140 190 Supply Current I All outputs enabled mA CC CML INPUT AND OUTPUT SPECIFICATIONS 640 800 1000 CML Differential Output Swing R = 50 to V (Figure 2) mV L CC P-P 85 100 115 Differential Output Impedance CML Output Common-Mode R = 50 to V V - 0.2 V L CC CC Voltage CML Single-Ended Input V V - 0.8 V + 0.5 V IS CC CC Voltage Range CML Differential Input Voltage 300 2000 mV P-P Swing CML Single-Ended Input 42.5 50 57.5 Impedance TTL SPECIFICATIONS TTL Input High Voltage V 2.0 V IH TTL Input Low Voltage V 0.8 V IL TTL Input High Current I -10 +10 A IH TTL Input Low Current I -10 +10 A IL 2 MAX3840