MAX3783UCM+D Analog Devices

MAX3783 19-2197 Rev 2 1/08 2.7Gbps Dual Mux/Buffer with Loopback General Description Features The MAX3783 is a dual serial multiplexer (mux) and Provides Redundant Serial I/O buffer with selectable line-side loopback for system 11ps Deterministic Jitter interconnect and serial backplane applications up to 2.7Gbps. Each independent channel consists of a trans- Selectable Loopback mitter with fanout of two and a receiver with a 2:1 input On-Chip 50 Termination Resistors mux. Selectable loopback paths support system testing. Operating from a single 3.3V supply, this device has 3.3V Power Supply current-mode logic (CML) inputs and outputs, which Two-Port Integration can be AC-coupled for PECL compatibility, if desired. The IC is packaged in a compact 48-pin TQFP-EP pack- age with exposed pad. Typical power consumption is 1.12W. Applications Ordering Information 2.7Gbps Serial Communications PART TEMP RANGE PIN-PACKAGE System Interconnect MAX3783UCM 0C to +85C 48 TQFP-EP* Serial Backplane MAX3783UCM+ 0C to +85C 48 TQFP-EP* Fail-Over and Protection Switching *EP = Exposed pad. + Denotes a lead-free package. Pin Configuration Typical Application Circuit appears at end of data sheet. GND 1 36 LI2A+ SIA- 2 35 LI2A- SIA+ 3 34 V CC 4 33 V LI1A+ CC 5 32 LB1A LI1A- LB2A 6 31 GND MAX3783 LB1B 7 30 GND LB2B 8 29 LI1B- V 9 28 LI1B+ CC 10 27 SIB+ V CC SIB- 11 26 LI2B- GND 12 25 LI2B+ TQFP-EP* *EXPOSED PAD MUST BE SOLDERED TO SUPPLY GROUND ON THE CIRCUIT BOARD. 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 AVAILABLE SELB SELA 13 48 V V CC 14 47 CC SOB+ 46 SOA+ 15 SOB- 16 45 SOA- V V 17 44 CC CC LO1B+ LO1A+ 18 43 LO1B- LO1A- 19 42 V V CC 20 41 CC LO2B+ 21 40 LO2A+ LO2B- LO2A- 22 39 V V CC 23 38 CC GND GND 24 372.7Gbps Dual Mux/Buffer with Loopback ABSOLUTE MAXIMUM RATINGS Supply Voltage, V ...............................................-0.5V to 4.0V Continuous Power Dissipation (T = +85C) CC A Continuous Current at Serial Outputs...............................36mA 48-Pin TQFP-EP (derate 27mW/C above +85C) .........1.76W Voltage at SEL , LB Pins ..........................-0.5V to (V + 0.5V) Storage Ambient Temperature ..........................-55C to +150C CC Common-Mode Input Voltage (SI , LI ).....-0.5V to (V + 0.5V) Lead Temperature (soldering, 10s) .................................+300C CC Differential Input Voltage (SI , LI ) (Note 1) .......................2.8V Note 1: The sum of the common-mode voltage and differential voltage on any input pin must be within -0.5V to (V + 0.5V). 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. ELECTRICAL CHARACTERISTICS (V = 3.0V to 3.6V, serial data rate = 2.75Gbps, T = 0C to +85C. Typical values at V = 3.3V, T = +25C, unless otherwise CC A CC A noted.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Maximum Serial Data Rate 2.75 3.125 Gbps Power Dissipation AC-coupled inputs, outputs 1.12 1.68 W Supply Current I 340 466 mA CC CML Differential Output Voltage V R = 50 to V , or 100 differential (Note 2) 1200 1500 2200 mVp-p OD L CC CML Differential Input Voltage V 200 1600 2200 mVp-p ID CML Output Impedance R Single ended 42.5 50 57.5 OUT CML Input Impedance R Differential 85 100 116 IN Random Jitter (Note 3) 1 2 ps RMS Deterministic Jitter (Notes 3, 4, 5) 11 25 ps p-p 2.5Gbps input (Note 6) 70 135 CML Output Edge Speed t , t ps R F (20% to 80%) 1.25Gbps input (Note 3) 80 200 Propagation Delay LI to SO , SI to LO , LI to LO (Note 3) 340 500 ps Multiplexer Switch Time SEL or LB to valid output 9 ns TTL Input Current High V = +2.0V to (V +0.3V) 180 A IH CC TTL Input Current Low V = -0.3V to +0.8V 440 A IL Note 2: Tested using a repeating 1010 pattern at 500Mbps. Note 3: AC specifications are guaranteed by design and characterization. Note 4: Deterministic jitter is measured with a repeating K28.5 pattern. Note 5: With the peak-to-peak input swing on the selected (transmitted) CML input equal to or greater than that on the nonselected inputs. Note 6: AC specifications are guaranteed by test. 2 MAX3783