19-5033; Rev 1; 8/10 TION KIT EVALUA BLE IL AVA A Two-Lane and Four-Lane DisplayPort Passive Switches with Separate AUX/HPD Control The MAX4998/MAX14998 high-speed passive switches route DisplayPortTM between two possible destinations or vice versa in laptops or desktop PCs. The MAX4998/ MAX14998 are intended to be used where ultra-highspeed performance and minimal input capacitance is required. The MAX4998 has three double-pole/double-throw (DPDT) switches and one single-pole/double-throw (SPDT) switch. Two DPDT switches are for high-frequency switching, one DPDT switch is for AUX, and the one SPDT switch is for HPD. The two high-frequency switches are selected by SEL1, and the AUX and HPD are selected by SEL2. This part is suitable for two-lane DisplayPort switching. The MAX14998 has six double-pole/double-throw (DPDT) switches. Four DPDT switches are for high-frequency switching, and two DPDT switches are for AUX and HPD. The four high-frequency switches are selected by SEL1, and the AUX and HPD are selected by SEL2. This part is suitable for four-lane DisplayPort switching. The MAX4998/MAX14998 are fully specified to operate from a single +3.3V (typ) power supply. The MAX4998 is available in a 3.5mm x 5.5mm, 28-pin TQFN package with exposed pad, and the MAX14998 is available in a 3.5mm x 9mm, 42-pin TQFN package with exposed pad. Both devices operate over the -40NC to +85NC extended temperature range. Applications Notebook PCs Desktop PCs Features S Single 3.3V Power-Supply Voltage S 8.5GHz (typ) Bandwidth S Support 1.6/5.4Gbps DisplayPort Signals Handles DisplayPort v1.1 Signals Handles DisplayPort v1.2 Signals S Excellent Return Loss -13dB at 2.7GHz S Independent High Frequency: AUX Select S Designed for AC-Coupled Circuits S Pass Throughs Are Maintained S Low 850A (max) Supply Current S Small Packages 3.5mm x 5.5mm, 28-Pin TQFN Package with Exposed Pad 3.5mm x 9mm, 42-Pin TQFN Package with Exposed Pad S Flow-Through Layout for Easy Board Layout S ESD Protection for All I/O Pins: Human Body Model (HBM) Q4kV Ordering Information TEMP RANGE PIN-PACKAGE MAX4998ETI+T PART -40NC to +85NC 28 TQFN-EP* MAX14998ETO+T -40NC to +85NC 42 TQFN-EP* +Denotes a lead(Pb)-free/RoHS-compliant package. T = Tape and reel. *EP = Exposed pad. Typical Operating Circuit appears at end of data sheet. DisplayPort is a trademark of Video Electronics Standards Association (VESA). ________________________________________________________________ Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim's website at www.maxim-ic.com. MAX4998/MAX14998 General Description MAX4998/MAX14998 Two-Lane and Four-Lane DisplayPort Passive Switches with Separate AUX/HPD Control ABSOLUTE MAXIMUM RATINGS (All voltages referenced to GND, unless otherwise noted.) VDD. .........................................................................-0.3V to +4V SEL1, SEL2, COM_, NO_, NC_ (Note 1)......-0.3V to +(VDD + 0.3)V |VCOM_ - VNO_|, |VCOM_ - VNC_| (Note 1)...................... 0 to +2V Continuous Current (COM_ to NO_/NC_)........................ Q70mA Peak Current (COM_ to NO_/NC_) (pulsed at 1ms, 10% duty cycle).................................. Q70mA Continuous Current (SEL1, SEL2).................................... Q30mA Peak Current (SEL1, SEL2) (pulsed at 1ms, 10% duty cycle).................................. Q70mA Continuous Power Dissipation (TA = +70NC) 28-Pin TQFN (derate 28.6mW/NC above +70NC)........2285mW 42-Pin TQFN (derate 34.5mW/NC above +70NC)........2758mW Operating Temperature Range........................... -40NC to +85NC Junction Temperature......................................................+150NC Storage Temperature Range............................. -65NC to +150NC Package Junction-to-Ambient Thermal Resistance (BJA) (Note 2) 28-Pin TQFN..................................................................35NC/W 42-Pin TQFN..................................................................29NC/W Package Junction-to-Case Thermal Resistance (BJC) (Note 2) 28-Pin TQFN.................................................................2.7NC/W 42-Pin TQFN....................................................................2NC/W Lead Temperature (soldering, 10s).................................+300NC Soldering Temperature (reflow).......................................+260NC Note 1: Signals on COM_, NO_, NC_, SEL1, and SEL2 exceeding VDD or GND are clamped by internal diodes. Limit forwarddiode current to the maximum current rating. Note 2: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a fourlayer board. For detailed information on package thermal considerations, refer to www.maxim-ic.com/thermal-tutorial. 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 (VDD = +3.3V Q10%, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VDD = +3.3V, TA = +25NC, unless otherwise noted.) (Note 3) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS (VDD 1.8) V 1.8 V ANALOG SWITCH Analog Signal Range Voltage Between COM_ and NO_/NC_ On-Resistance VCOM_, VNO_, VNC_ |VCOM_ - VNO_|, |VCOM_ - VNC_| RON 0 ICOM_ = 15mA; VNO_, VNC_ = 0V, +1.2V 7 I On-Resistance Match Between Pairs of Same Channel DRON VDD = +3.0V; ICOM_ = 15mA; VNO_, VNC_ = 0V (Notes 4, 5) 0.1 2 I On-Resistance Match Between Channels DRON VDD = +3.0V; ICOM_ = 15mA; VNO_, VNC_ = 0V (Notes 4, 5) 1.0 4 I On-Resistance Flatness RFLAT(ON) VDD = +3.0V; ICOM_ = 15mA; VNO_, VNC_ = 0V, +1.2V (Notes 5, 6) 0.3 1.5 I NO_ or NC_ Off-Leakage Current INO_(OFF) INC_(OFF) VDD = +3.6V; VCOM_ = 0V, +1.2V; VNO_ or VNC_ = +1.2V, 0V -1 1 FA COM_ On-Leakage Current ICOM_(ON) VDD = +3.6V; VCOM_ = 0V, +1.2V; VNO_ or VNC_ = VCOM_ or unconnected -1 1 FA 120 ns DIGITAL SIGNALS SEL1 and SEL2 to Switch Turn-On Time tON_SEL VNO_ or VNC_ = +1.0V, RL = 50I, CL = 100pF (Figure 1) 45 2 _______________________________________________________________________________________ Two-Lane and Four-Lane DisplayPort Passive Switches with Separate AUX/HPD Control (VDD = +3.3V Q10%, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VDD = +3.3V, TA = +25NC, unless otherwise noted.) (Note 3) PARAMETER SYMBOL SEL1 and SEL2 to Switch Turn-Off Time tOFF_SEL Differential Insertion Loss SDD21 Differential Crosstalk CONDITIONS SDD11 Signal Data Rate BR Differential -3dB Bandwidth f-3BW Differential Off-Isolation TYP MAX UNITS 5 50 ns VNO_ or VNC_ = +1.0V, RL = 50I, CL = 100pF (Figure 1) SDDCTK Differential Return Loss MIN SDD21_OFF f = 0.8GHz (Figure 2) -0.67 f = 1.35GHz (Figure 2) -0.95 f = 0.8GHz (Figure 2) -37 f = 1.35GHz (Figure 2) -34 f = 0.8GHz (Figure 2) -20 f = 1.35GHz (Figure 2) -14 RS = RL = 100I balanced RS = RL = 100I balanced 17 Gbps 8.5 GHz f = 1.35GHz (Figure 2) -28 dB dB dB dB LOGIC INPUT (SEL1, SEL2) Input Logic-High VIH Input Logic-Low VIL Input Logic Hysteresis VHYST Input Leakage Current IIN 1.4 V 0.5 100 VSEL_ = 0V or VDD V mV -1 +1 FA 3.0 3.6 V 850 FA POWER SUPPLY Power-Supply Range VDD VDD Supply Current IDD VSEL_ = 0V or VDD 500 Note 3: All units are 100% production tested at TA = +85NC. Limits over the operating temperature range are guaranteed by design and characterization and are not production tested. Note 4: DRON = RON(MAX) - RON(MIN). Note 5: Guaranteed by design. Not production tested. Note 6: Flatness is defined as the difference between the maximum and minimum value of on-resistance as measured over the specified analog signal range. Test Circuits/Timing Diagrams +3.3V LOGIC INPUT SEL_ VDD t r < 5ns t f < 5ns VIH VIL 50% MAX4998/MAX14998 VN_ NO_ OR NC_ t OFF_SEL COM_ VOUT RL SEL_ LOGIC INPUT SEL CL SWITCH OUTPUT COM_ VOUT 0.9 x VOUT t ON_SEL GND t OFF_SEL CL INCLUDES FIXTURE AND STRAY CAPACITANCE. VOUT = VN_ 0.9 x VOUT 0V ( RL RL + RON ) SWITCH OUTPUT COM_ 0.9 x VOUT 0.9 x VOUT 0V t ON_SEL Figure 1. Switching Time _______________________________________________________________________________________ 3 MAX4998/MAX14998 ELECTRICAL CHARACTERISTICS (continued) MAX4998/MAX14998 Two-Lane and Four-Lane DisplayPort Passive Switches with Separate AUX/HPD Control Test Circuits/Timing Diagrams (continued) +3.3V +3.3V 0.1F 0.1F VDD 0V 0V SEL1 SEL2 COM_+ MAX4998 MAX14998 50 50 COM_- NC_+ NETWORK ANALYZER PORT 1 VIN+ 50 PORT 2 VIN- 50 PORT 3 VOUT+ 50 VDD NC_- 50 COM_- NC_+ 50 PORT 4 VOUT- COM_+ MAX4998 MAX14998 NO_+ NO_- SEL1 SEL2 VDD VDD NETWORK ANALYZER PORT 1 VIN+ 50 PORT 2 VIN- 50 PORT 3 VOUT+ 50 PORT 4 VOUT- 50 NO_+ 50 NO_- NC_- GND GND DIFFERENTIAL INSERTION LOSS/DIFFERENTIAL RETURN LOSS DIFFERENTIAL INSERTION LOSS = 20log ( VOUT+ - VOUTVIN+ - VIN- DIFFERENTIAL OFF-ISOLATION ) DIFFERENTIAL OFF-ISOLATION = 20log ( +3.3V 0.1F VDD 0V OR VDD 0V OR VDD SEL1 SEL2 COM_+ MAX4998 MAX14998 50 50 50 50 COM_- NETWORK ANALYZER PORT 1 VIN+ 50 PORT 2 VIN- 50 PORT 3 VOUT+ 50 PORT 4 VOUT- 50 COM_+ COM_- NO_+/NC_+ NO_+/NC_+ NO_-/NC_- NO_-/NC_GND DIFFERENTIAL CROSSTALK DIFFERENTIAL CROSSTALK = 20log ( VOUT+ - VOUTVIN+ - VIN- ) MEASUREMENTS ARE STANDARDIZED AGAINST SHORTS AT IC TERMINALS. DIFFERENTIAL OFF-ISOLATION IS MEASURED BETWEEN COM_ AND "OFF" NO_ OR NC_ TERMINAL ON EACH SWITCH. DIFFERENTIAL ON-LOSS IS MEASURED BETWEEN COM_ AND "ON" NO_ OR NC_ TERMINAL ON EACH SWITCH. DIFFERENTIAL CROSSTALK IS MEASURED BETWEEN ANY TWO PAIRS. Figure 2. Differential On-Loss, Differential Off-Isolation, and Differential Crosstalk 4 _______________________________________________________________________________________ VOUT+ - VOUTVIN+ - VIN- ) Two-Lane and Four-Lane DisplayPort Passive Switches with Separate AUX/HPD Control ON-RESISTANCE vs. COM_ VOLTAGE 6.0 5.5 TA = +25C 7 TA = -40C 6 5.0 -0.1 0.1 -0.1 0.1 0.3 0.5 0.7 0.9 1.1 1.3 1.5 1.7 1.9 0.3 0.5 1.1 1.3 0.9 VIL 3.5 tON_SEL 30 20 tOFF_SEL 3.6 3.0 3.1 3.2 3.3 3.4 -40 -50 -60 -70 3.5 -80 1000 FREQUENCY (MHz) -5 -6 -7 -8 10 -20 -30 10,000 1000 10,000 DIFFERENTIAL RETURN LOSS MAX4998/MAX14998 toc08 -10 100 FREQUENCY (MHz) -40 -50 -60 0 -5 -10 -15 -20 -25 -30 -35 -80 100 -4 3.6 -70 10 -3 DIFFERENTIAL CROSSTALK 0 DIFFERENTIAL CROSSTALK (dB) -30 -2 SUPPLY VOLTAGE (V) MAX4998/MAX14998 toc07 -20 -1 -9 DIFFERENTIAL OFF-ISOLATION -10 85 -10 SUPPLY VOLTAGE (V) 0 60 MAX4998/MAX14998 toc09 3.4 35 0 0 3.3 10 MAX4998/MAX14998 toc06 50 40 -15 DIFFERENTIAL INSERTION LOSS TURN-ON/OFF TIME vs. SUPPLY VOLTAGE 0.5 3.2 200 TEMPERATURE (C) 10 3.1 300 -40 DIFFERENTIAL INSERTION LOSS (dB) VIH 1.1 3.0 400 0 1.5 DIFFERENTIAL RETURN LOSS (dB) LOGIC THRESHOLD (V) 0.9 MAX4998/MAX14998 toc05 VDD = 3.3V 1.3 DIFFERENTIAL OFF-ISOLATION (dB) 0.7 60 TURN-ON/OFF TIME (ns) MAX4998/MAX14998 toc04 LOGIC THRESHOLD vs. SUPPLY VOLTAGE 0.7 500 VCOM_ (V) VCOM_ (V) 1.5 600 100 4 4.0 VDD = 3.3V 700 5 4.5 MAX4998/MAX14998 toc03 TA = +85C 8 800 SUPPLY CURRENT (A) 6.5 VDD = 3.3V ICOM_ = 15mA 9 SUPPLY CURRENT vs. TEMPERATURE MAX4998/MAX14998 toc02 7.0 10 ON-RESISTANCE () VDD = 3.6V ICOM_ = 15mA 7.5 ON-RESISTANCE () MAX4998/MAX14998 toc01 ON-RESISTANCE vs. COM_ VOLTAGE 8.0 -40 10 100 1000 FREQUENCY (MHz) 10,000 10 100 1000 10,000 FREQUENCY (MHz) _______________________________________________________________________________________ 5 MAX4998/MAX14998 Typical Operating Characteristics (TA = +25C, unless otherwise noted.) Pin Configurations NC5- NC5+ NC4- NC4+ VDD NO3- NO3+ NO2- NO2+ NO1- NO1+ NO0- NO0+ NC3- 6 7 8 9 TQFN 18 NO5- 10 11 12 13 14 15 16 17 SEL2 5 SEL1 4 COM5- 3 COM5+ 2 VDD 1 COM4- 10 COM4+ 9 COM3- 8 COM3+ 7 SEL1 COM1- 6 VDD COM1+ 5 COM3+ 4 VDD 3 COM2- 2 COM2+ 1 COM0- + 19 NO5+ *EP + COM2- NC0+ 42 *EP COM2+ 11 SEL2 NC0+ 28 20 NO4- MAX14998 VDD NC0- 41 COM1- 12 NO3+ 21 NO4+ COM1+ NC1+ 40 COM0- NC1- 39 13 NO2- VDD 14 NO2+ COM0+ NC1- 25 NC1+ 26 MAX4998 NC3+ 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 24 23 22 21 20 19 18 17 16 15 NC0- 27 NC2- NC2+ VDD NC3+ NC2- NC2+ VDD NO1- NO1+ NO0- GND NO0+ TOP VIEWS COM0+ MAX4998/MAX14998 Two-Lane and Four-Lane DisplayPort Passive Switches with Separate AUX/HPD Control TQFN *CONNECT EXPOSED PAD TO GROUND. Pin Description PIN NAME FUNCTION MAX4998 MAX14998 1 2 COM0+ Analog Switch 1. Common positive terminal. 2 3 COM0- Analog Switch 1. Common negative terminal. 3 4 COM1+ Analog Switch 2. Common positive terminal. 4 5 COM1- Analog Switch 2. Common negative terminal. 5 7 COM2+ Analog Switch 3. Common positive terminal. 6 8 COM2- Analog Switch 3. Common negative terminal. 7, 9, 15, 19 1, 6, 13, 26 VDD Positive Supply Voltage Input. Connect VDD to a +3.0V to +3.6V supply voltage. Bypass VDD to GND with a 0.1mF ceramic capacitor placed as close to the device as possible (see the Board Layout section). 8 9 COM3+ 10 16 SEL1 Analog Switch 4. Common positive terminal. Control Signal Input. Selects high-frequency switching. 11 17 SEL2 Control Signal Input. Selects AUX/HPD. 12 28 NO3+ Analog Switch 4. Normally Open positive terminal. 13 29 NO2- Analog Switch 3. Normally Open negative terminal. 14 30 NO2+ Analog Switch 3. Normally Open positive terminal. 16 36 NC3+ Analog Switch 4. Normally Closed positive terminal. 17 37 NC2- Analog Switch 3. Normally Closed negative terminal. 18 38 NC2+ Analog Switch 3. Normally Closed positive terminal. 20 31 NO1- Analog Switch 2. Normally Open negative terminal. 21 32 NO1+ Analog Switch 2. Normally Open positive terminal. 22 33 NO0- Analog Switch 1. Normally Open negative terminal. 6 _______________________________________________________________________________________ Two-Lane and Four-Lane DisplayPort Passive Switches with Separate AUX/HPD Control PIN MAX4998 MAX14998 23 34 NAME FUNCTION NO0+ Analog Switch 1. Normally Open positive terminal. 24 -- GND Ground 25 39 NC1- Analog Switch 2. Normally Closed negative terminal. 26 40 NC1+ Analog Switch 2. Normally Closed positive terminal. 27 41 NC0- Analog Switch 1. Normally Closed negative terminal. 28 42 NC0+ Analog Switch 1. Normally Closed positive terminal. -- 10 COM3- Analog Switch 4. Common negative terminal. -- 11 COM4+ Analog Switch 5. Common positive terminal. -- 12 COM4- Analog Switch 5. Common negative terminal. -- 14 COM5+ Analog Switch 6. Common positive terminal. -- 15 COM5- Analog Switch 6. Common negative terminal. -- 18 NO5- Analog Switch 6. Normally Open negative terminal. -- 19 NO5+ Analog Switch 6. Normally Open positive terminal. -- 20 NO4- Analog Switch 5. Normally Open negative terminal. -- 21 NO4+ Analog Switch 5. Normally Open positive terminal. -- 22 NC5- Analog Switch 6. Normally Closed negative terminal. -- 23 NC5+ Analog Switch 6. Normally Closed positive terminal. -- 24 NC4- Analog Switch 5. Normally Closed negative terminal. -- 25 NC4+ Analog Switch 5. Normally Closed positive terminal. -- 27 NO3- Analog Switch 4. Normally Open negative terminal. -- 35 NC3- Analog Switch 4. Normally Closed negative terminal. -- -- EP Exposed Pad. Internally connected to GND. Connect to a large plane to maximize thermal performance. Not intended as an electrical part. Detailed Description The MAX4998/MAX14998 high-speed passive switches route one DisplayPort source between two possible destinations or vice versa. The MAX4998 is used to switch two-lanes plus AUX/HPD DisplayPort, and the MAX14998 is used to switch four-lanes plus AUX/HPD DisplayPort. The MAX4998/MAX14998 feature two digital control inputs (SEL1, SEL2) to switch signal paths. Digital Control Inputs (SEL1, SEL2) The MAX4998/MAX14998 provide two digital control inputs (SEL1, SEL2) to select the signal path between the COM_ and NO_/NC_ channels. SEL1 selects highfrequency switching, while SEL2 selects AUX/HPD. On the MAX4998, switches 1 and 2 are high-frequency switches and switches 3 and 4 are both low-frequency switches. On the MAX14998, switches 1, 2, 3, and 4 are high-frequency switches and switches 5 and 6 are lowfrequency switches. The truth tables for the MAX4998/ MAX14998 are depicted in the Functional Diagrams/ Truth Tables. Drive SEL_ 0V to VDD to minimize power consumption. Analog Signal Levels The MAX4998/MAX14998 accept standard DisplayPort signals to a maximum of (VDD - 1.8V). Signals on the COM_+ channels are routed to either the NO_+ or NC_+ channels. Signals on the COM_- channels are routed to either the NO_- or NC_- channels. The MAX4998/ MAX14998 are bidirectional switches, allowing COM_, NO_, and NC_, to be used as either inputs or outputs. _______________________________________________________________________________________ 7 MAX4998/MAX14998 Pin Description (continued) MAX4998/MAX14998 Two-Lane and Four-Lane DisplayPort Passive Switches with Separate AUX/HPD Control Functional Diagrams/Truth Tables VDD MAX14998 COM0+ NC0+ COM0- NC0NO0+ NO0- COM1+ NC1+ COM1- NC1VDD NO1+ NO1COM2+ NC2+ COM2- NC2- MAX4998 NO2+ COM0+ NC0+ NO2- COM0- NC0- COM3+ NC3+ NO0+ COM3- NC3- NO0- NO3+ COM1+ NO3- COM1- NC1+ NC1NO1+ COM4+ NC4+ COM4- NC4- NO1- NO4+ COM2+ NC2+ NO4- COM2- NC2- COM5+ NC5+ COM5- NC5NO5+ NO2+ NO2COM3+ NC3+ NO3+ NO5SEL1 SEL1 SEL2 SEL2 GND GND SEL1 0 1 EVENT COM_ TO NC_ COM_ TO NO_ SWITCH 1, 2, 3, 4 1, 2, 3, 4 SEL1 0 1 EVENT COM_ TO NC_ COM_ TO NO_ SWITCH 1, 2 1, 2 SEL2 0 1 EVENT COM_ TO NC_ COM_ TO NO_ SWITCH 5, 6 5, 6 SEL2 0 1 EVENT COM_ TO NC_ COM_ TO NO_ SWITCH 3, 4 3, 4 8 _______________________________________________________________________________________ Two-Lane and Four-Lane DisplayPort Passive Switches with Separate AUX/HPD Control VDD = +3.3V DOCKING STATION MAX4998 NO0+ NO0NO1+ NO1NO2+ NO2- VCC = +1.1V GRAPHICS AND MEMORY CONTROLLER HUB DP0 DP1 AUX HPD DP01 DP11 AUX1 +1.1V 10k COM0+ COM0COM1+ COM1COM2+ COM2COM3+ HPD1 NO3+ 1 OF THE 7WZ07 2 DisplayPort CONNECTOR NC0+ NC0NC1+ NC1NC2+ NC2- DP02 DP12 AUX2 +1.1V 10k CHANNEL SELECT CHANNEL SELECT SEL1 SEL2 HPD2 NC3+ 1 OF THE 7WZ07 2 7WZ07 DUAL-GATE LOTIC OPERATES FROM +3.3V VCC NOTE: THE APPLICATION SHOWN IS A TWO-LANE SWITCH BETWEEN THE DOCKING STATION AND DisplayPort CONNECTOR ON A LAPTOP. SEL2 NEEDS TO BE CHANGED FIRST WHEN SWITCHING SO THAT THE AUX/HPD SIGNAL CAN ESTABLISH CONTACT AND SET PARAMETERS THROUGH DDC. THE HPD SIGNALS FROM THE DOCKING STATION AND DP CONNECTOR NEED TO BE INPUT THROUGH A LEVEL TRANSLATOR, SUCH AS A 7WZ07 OR 742G07 NONINVERTING TO THE MAX4998. EACH OUTPUT IS PULLED UP TO MATCH THE LOGIC LEVEL OF THE GMCH. THE COM SIDE OF THE MAX4998 NEEDS TO BE CONNECTED DIRECTLY TO THE GMCH, RUNNING AT LOW VOLTAGE (APPROXIMATELY 1.1V). THIS ESTABLISHES THE COMMON-MODE VOLTAGE FOR THE SWITCH AND KEEPS THE SWITCH WITHIN ITS OPTIMAL RANGE. IF A FOUR-LANE DisplayPort SWITCH IS DESIRED, THE MAX14998 SHOULD BE USED. THE CIRCUIT IS THE SAME EXCEPT THAT DP0 TO DP3 IS USED WITH AUX, AND THE HPD CIRCUITRY IS THE SAME. _______________________________________________________________________________________ 9 MAX4998/MAX14998 Typical Operating Circuit MAX4998/MAX14998 Two-Lane and Four-Lane DisplayPort Passive Switches with Separate AUX/HPD Control Applications Information Board Layout High-speed switches require proper layout and design procedures for optimum performance. Keep designcontrolled impedance PCB traces as short as possible. Ensure that power-supply bypass capacitors are placed as close to the device as possible. Multiple bypass capacitors are recommended. Connect all grounds and the exposed pad to large ground planes. Chip Information PROCESS: CMOS Package Information For the latest package outline information and land patterns, go to www.maxim-ic.com/packages. Note that a "+", "#", or "-" in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status. PACKAGE TYPE PACKAGE CODE OUTLINE NO. LAND PATTERN NO. 28 TQFN-EP T283555+1 21-0184 90-0123 42 TQFN-EP T423590+1 21-0181 90-0078 10 Two-Lane and Four-Lane DisplayPort Passive Switches with Separate AUX/HPD Control REVISION REVISION NUMBER DATE DESCRIPTION PAGES CHANGED 0 10/09 Initial release -- 1 8/10 Removed future status from the MAX14998 in the Ordering Information table; changed the bandwidth to 8.5GHz (typ) in the Features section; changed the return loss to -13dB at 2.7GHz in the Features section; added sub-bullets describing the DisplayPort signals v1.1 and v1.2 to the Features section 1 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. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 (c) 2010 Maxim Integrated Products 11 Maxim is a registered trademark of Maxim Integrated Products, Inc. MAX4998/MAX14998 Revision History