MAX3750CEE

19-4792; Rev 2; 5/04 KIT ATION EVALU E L B A AVAIL +3.3V, 2.125Gbps/1.0625Gbps Fibre Channel Port Bypass ICs Features ♦ Single +3.3V Supply The MAX3750/MAX3751 are +3.3V, Fibre Channel port bypass ICs that include a high-speed multiplexer and output buffer stage for hot swapping a storage device. These devices are optimized for use in a Fibre Channel arbitrated loop topology. The MAX3750 has a 2.125Gbps data rate, while the MAX3751’s data rate is 1.0625Gbps. Total power consumption (including output currents) is low: just 190mW for the MAX3750 and 180mW for the MAX3751. Low 10ps jitter makes these devices ideal for cascaded topologies. The output driver circuitry is tolerant of load mismatches commonly caused by board vias and inductive connectors. On-chip termination reduces external part count and simplifies board layout. ♦ Low Jitter: 10ps ♦ Low Power Consumption 190mW (MAX3750) 180mW (MAX3751) ♦ Large Output Signal Swing: >1000mVp-p ♦ Mismatch Tolerant Output Driver Stage ♦ 150Ω Differential On-Chip Termination on All Inputs ♦ 150Ω On-Chip Back Termination on All Output Ports Ordering Information Applications PART 2.125Gbps Fibre Channel Arbitrated Loop 1.0625Gbps Fibre Channel Arbitrated Loop Mass Storage Systems RAID/JBOD Applications TEMP RANGE PIN-PACKAGE MAX3750CEE 0°C to +70°C 16 QSOP MAX3750CEE† 0°C to +70°C 16 QSOP MAX3751CEE 0°C to +70°C 16 QSOP †Denotes lead-free package. OUT- GND MAX3750 MAX3750 MAX3751 SEL C3 IN+ OUT+ IN- OUTC4 VCC GND FC-AL DISK DRIVE IN+ OUT+ IN- MAX3750 MAX3751 OUTC6 VCC 3.3V C1–C8 = 100nF GND LOUT- LOUT+ LIN- LIN+ C5 MAX3750 SEL RX C1 TX LOUT- LOUT+ LIN- LIN+ LOUT- LOUT+ LIN- LIN+ OUT+ RX C2 TX C8 RX C7 TX FC-AL DISK DRIVE FC-AL DISK DRIVE Typical Application Circuit MAX3750 IN+ IN- MAX3750 MAX3751 SEL VCC 3.3V 3.3V MICROPROCESSOR THREE MAX3750/MAX3751s CASCADED IN AN FC-AL APPLICATION Pin Configuration appears at end of data sheet. ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. 1 MAX3750/MAX3751 General Description MAX3750/MAX3751 +3.3V, 2.125Gbps/1.0625Gbps Fibre Channel Port Bypass ICs ABSOLUTE MAXIMUM RATINGS Supply Voltage, VCC..............................................-0.5V to +5.0V Voltage at LOUT+, LOUT-, OUT+, OUT- ..............................(VCC - 1.65V) to (VCC + 0.5V) Current Out of LOUT+, LOUT-, OUT+, OUT- ...................±22mA Voltage at SEL, LIN+, LIN-, IN+, IN- ..........-0.5V to (VCC + 0.5V) Differential Voltage at (LIN+ - LIN-), (IN+ - IN-).....................±2V Continuous Power Dissipation (TA = +70°C) 16 QSOP (derate 8.3mW/°C above +70°C) .................667mW Operating Temperature Range ...........................-40°C to +85°C Storage Temperature Range ...............................-55°C to 150°C Lead Soldering Temperature (soldering, 10s).................+300°C DC ELECTRICAL CHARACTERISTICS (VCC = +3.0V to +3.6V, TA = 0°C to +70°C, unless otherwise noted. Typical values are at VCC = +3.3V and TA = +25°C.) PARAMETER Supply Current Data Input Voltage Swing Differential Input Impedance Output Voltage at LOUT± and OUT± TYP MAX MAX3750 (Note 1) CONDITIONS 57 84 MAX3751 (Note 1) 54 78 150 2200 172 mV Ω 1600 mV Total differential signal, peak-to-peak 150Ω load, total differential signal, peak-to-peak TTL Input Current TTL Input Low TTL Input High MIN 200 132 1000 -10 -0.3 2 10 0.8 VCC + 0.3 UNITS mA µA V V Note 1: Output currents included. AC ELECTRICAL CHARACTERISTICS (VCC = +3.0V to +3.6V, TA = 0°C to +70°C, unless otherwise noted. Typical values are at VCC = +3.3V and TA = +25°C.) PARAMETER Data Rate CONDITIONS MIN TYP MAX3750 2.125 MAX3751 1.0625 200 MAX Gbps Data Input Voltage Swing Total differential signal, peak-to-peak Output Edge Speed IN± →OUT±, IN± →LOUT± MAX3750 2200 160 MAX3751 325 Deterministic Jitter IN± →OUT±, IN± →LOUT±, LIN± →OUT± MAX3750, peak-to-peak (Notes 2, 4) 10 MAX3751, peak-to-peak (Notes 3, 4) 10 Random Jitter IN± →OUT±, IN± →LOUT±, LIN± →OUT± MAX3750, RMS (Note 2) 1.6 MAX3751, RMS (Note 3) 1.6 Prop Delay IN± →OUT±, IN± →LOUT±, LIN± →OUT± MAX3750 300 MAX3751 442 Note 2: Input tR and tF < 150ps, 20% to 80%. Note 3: Input tR and tF < 300ps, 20% to 80%. Note 4: Deterministic jitter is measured with 20 bits of the k28.5 pattern (00111110101100000101). 2 _______________________________________________________________________________________ UNITS mV ps ps ps ps +3.3V, 2.125Gbps/1.0625Gbps Fibre Channel Port Bypass ICs SUPPLY CURRENT vs. TEMPERATURE MAX3750/51 toc01 59 SUPPLY CURRENT (mA) 58 57 MAX3750 56 55 54 MAX3751 53 52 51 50 -40 -20 0 20 40 60 80 100 TEMPERATURE (°C) Pin Description PIN NAME 1, 4, 5, 8, 16 GND FUNCTION 2 LOUT+ Noninverted Port Data Output 3 LOUT- Inverted Port Data Output 6 OUT+ Noninverted Data Output 7 OUT- Inverted Data Output 9 SEL Select Input: SEL = Low: IN± → OUT± SEL = High: LIN± → OUT± 10 LIN- Inverted Port Data Input 11 LIN+ Noninverted Port Data Input 12, 13 VCC Positive Supply Voltage 14 IN- Inverted Data Input 15 IN+ Noninverted Data Input Electrical Ground _______________________________________________________________________________________ 3 MAX3750/MAX3751 Typical Operating Characteristics (VCC = 3.3V, TA = +25°C, unless otherwise noted.) _________________Circuit Description Layout Techniques The MAX3750/MAX3751 are high-frequency products. The performance of the circuit is largely dependent upon layout of the circuit board. Use a multilayer circuit board with dedicated ground and VCC planes. Power supplies should be capacitively bypassed to the ground plane with surface-mount capacitors placed near the power-supply pins. A simplified block diagram of the single port bypass is shown in Figure 1. IN+ and IN- drive an input buffer (INBUFF) with 150Ω of internal differential input termination. INBUFF drives an output buffer (LOBUFF) and an input to a multiplexer (MUX). A low TTL input at SEL selects the signal path of INBUFF through MUX to the output buffer (OUTBUFF). When SEL has a high TTL logic level present the signal path is into LIBUFF, through MUX, to OUTBUFF. Low-Frequency Cutoff The low-frequency cutoff is determined by the input resistance and the coupling capacitor as illustrated by the following equation: fC = 1 / (2πRC) LOBUFF LIN- LIN+ LOUT- In a typical system where R = 150Ω and C = 100nF, resulting in fC = 10kHz. LOUT+ MAX3750/MAX3751 +3.3V, 2.125Gbps/1.0625Gbps Fibre Channel Port Bypass ICs LIBUFF OUTBUFF IN+ MUX INBUFF D0 OUT+ Q IN- OUT- D1 SEL MAX3750 MAX3751 VCC TTLIN GND SEL NOTE: SEE INTERNAL INPUT/OUTPUT SCHEMATICS FOR DETAILED TERMINATIONS (FIGURES 2–5). Figure 1. MAX3750/MAX3751 Block Diagram 4 _______________________________________________________________________________________ +3.3V, 2.125Gbps/1.0625Gbps Fibre Channel Port Bypass ICs MAX3750/MAX3751 VCC 75Ω ESD STRUCTURES 75Ω VCC (L)OUT+ (L)OUT- SEL ESD STRUCTURE GND GND Figure 2. LOUT/OUT Pins Internal Input/Output Schematic Figure 3. SEL Pin Internal Input/Output Schematic VCC ESD STRUCTURE IN+ MAX3750 MAX3751 300Ω (L)IN+ OUT+ 300Ω IN- OUT- IN+ OUT+ (L)IN75Ω 75Ω 43Ω 43Ω MAX3750 MAX3751 176Ω 43Ω IN- 176Ω 43Ω OUT- GND Figure 4. LIN/IN Pins Internal Input/Output Schematic Figure 5. 50Ω Termination Applications _______________________________________________________________________________________ 5 Pin Configuration TOP VIEW GND 1 16 GND LOUT+ 2 15 IN+ LOUT- 3 GND 4 GND 5 14 IN- MAX3750 MAX3751 13 VCC 12 VCC OUT+ 6 11 LIN+ OUT- 7 10 LIN- GND 8 9 SEL QSOP Package Information (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages.) QSOP.EPS MAX3750/MAX3751 +3.3V, 2.125Gbps/1.0625Gbps Fibre Channel Port Bypass ICs Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 6 _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2004 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.