19-2078; Rev 2; 10/02 1:10 Differential LVPECL/LVECL/HSTL Clock and Data Drivers The MAX9311/MAX9313 are low-skew, 1-to-10 differential drivers designed for clock and data distribution. These devices allow selection between two inputs. The selected input is reproduced at 10 differential outputs. The differential inputs can be adapted to accept singleended inputs by connecting the on-chip VBB supply to one input as a reference voltage. The MAX9311/MAX9313 feature low part-to-part skew (30ps) and output-to-output skew (12ps), making them ideal for clock and data distribution across a backplane or a board. For interfacing to differential HSTL and LVPECL signals, these devices operate over a +2.25V to +3.8V supply range, allowing high-performance clock or data distribution in systems with a nominal +2.5V or +3.3V supply. For differential LVECL operation, these devices operate from a -2.25V to -3.8V supply. The MAX9311 features an on-chip VBB reference output of 1.425V below the positive supply voltage. The MAX9313 offers an on-chip V BB reference output of 1.32V below the positive supply voltage. Both devices are offered in space-saving, 32-pin 5mm ✕ 5mm TQFP, 5mm x 5mm QFN, and industry-standard 32-pin 7mm x 7mm LQFP packages. Applications Precision Clock Distribution Low-Jitter Data Repeater Features ♦ +2.25V to +3.8V Differential HSTL/LVPECL Operation ♦ -2.25V to -3.8V LVECL Operation ♦ 30ps (typ) Part-to-Part Skew ♦ 12ps (typ) Output-to-Output Skew ♦ 312ps (typ) Propagation Delay ♦ ≥ 300mV Differential Output at 3GHz ♦ On-Chip Reference for Single-Ended Inputs ♦ Output Low with Open Input ♦ Pin Compatible with MC100LVEP111 (MAX9311) and MC100EP111 (MAX9313) ♦ Offered in Tiny QFN* Package (70% Smaller Footprint than LQFP) Ordering Information PART TEMP. RANGE PIN-PACKAGE MAX9311ECJ -40°C to +85°C 32 LQFP (7mm ✕ 7mm) MAX9311EGJ* -40°C to +85°C 32 QFN (5mm ✕ 5mm) MAX9311EHJ* -40°C to +85°C 32 TQFP (5mm ✕ 5mm) MAX9313ECJ -40°C to +85°C 32 LQFP (7mm ✕ 7mm) MAX9313EGJ* -40°C to +85°C 32 QFN (5mm ✕ 5mm) MAX9313EHJ* -40°C to +85°C 32 TQFP (5mm ✕ 5mm) *Future product—contact factory for availability. Pin Configuration TOP VIEW VCC Q0 Q0 Q1 Q1 Q2 Q2 VCC 32 30 29 28 27 26 25 31 VCC 1 24 Q3 CLKSEL 2 23 Q3 CLK0 3 22 Q4 CLK0 4 VBB LQFP (7mm × 7mm), TQFP (5mm × 5mm), QFN (NO LEADS EXTENDING FROM QFN PACKAGE) MAX9311/MAX9313 21 Q4 MAX9311 MAX9313 5 20 Q5 CLK1 6 19 Q5 CLK1 7 18 Q6 VEE 8 17 Q6 10 11 12 13 14 15 16 VCC Q9 Q9 Q8 Q8 Q7 Q7 VCC 9 CLKSEL CLK0, CLK0 CLK1, CLK1 0 ON OFF 1 OFF ON ________________________________________________________________ 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 MAX9311/MAX9313 General Description MAX9311/MAX9313 1:10 Differential LVPECL/LVECL/HSTL Clock and Data Drivers ABSOLUTE MAXIMUM RATINGS VCC - VEE...............................................................................4.1V Inputs (CLK_, CLK_, CLKSEL)..............VEE - 0.3V to VCC + 0.3V CLK_ to CLK_ ....................................................................±3.0V Continuous Output Current .................................................50mA Surge Output Current........................................................100mA VBB Sink/Source Current ...............................................±0.65mA Junction-to-Ambient Thermal Resistance in Still Air 7mm x 7mm LQFP .....................................................+90°C/W Junction-to-Ambient Thermal Resistance with 500 LFPM Airflow 7mm x 7mm LQFP .....................................................+60°C/W Junction-to-Case Thermal Resistance 7mm x 7mm LQFP .....................................................+12°C/W Operating Temperature Range ...........................-40°C to +85°C Junction Temperature ......................................................+150°C Storage Temperature Range .............................-65°C to +150°C ESD Protection Human Body Model (CLKSEL, CLK_, CLK_, Q_, Q_, VBB).......................................................................2kV Soldering Temperature (10s) ...........................................+300°C 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 (VCC - VEE = +2.25V to +3.8V, outputs loaded with 50Ω ±1% to VCC - 2V, CLKSEL = high or low, unless otherwise noted.) (Notes 1–4) PARAMETER SYMBOL CONDITIONS -40°C +25°C +85°C MIN MAX MIN MAX MIN MAX MAX9311 VCC - 1.23 VCC VCC - 1.23 VCC VCC - 1.23 VCC MAX9313 VCC - 1.165 VCC VCC - 1.165 VCC VCC - 1.165 VCC MAX9311 VEE VCC - 1.62 VEE VCC - 1.62 VEE VCC - 1.62 VEE VCC - 1.475 VEE VCC - 1.475 VEE VCC - 1.475 UNITS SINGLE-ENDED INPUT (CLKSEL) Input High Voltage Input Low Voltage VIH VIL Input High Current IIH Input Low Current IIL Internal VBB threshold Internal VBB threshold V MAX9313 150 150 V 150 µA µA -10 +10 -10 +10 -10 +10 VCC - 1.23 VCC VCC - 1.23 VCC VCC - 1.23 VCC DIFFERENTIAL INPUTS (CLK_, CLK_) Single-Ended Input High Voltage 2 VIH VBB connected MAX9311 to CLK_ (VIL for VBB connected MAX9313 to CLK_), Figure 1 V VCC - 1.165 VCC VCC - 1.165 VCC VCC - 1.165 _______________________________________________________________________________________ VCC 1:10 Differential LVPECL/LVECL/HSTL Clock and Data Drivers MAX9311/MAX9313 DC ELECTRICAL CHARACTERISTICS (continued) (VCC - VEE = +2.25V to +3.8V, outputs loaded with 50Ω ±1% to VCC - 2V, CLKSEL = high or low, unless otherwise noted.) (Notes 1–4) PARAMETER SYMBOL CONDITIONS VIL VBB connected MAX9311 to CLK_ (VIH for VBB connected MAX9313 to CLK_), Figure 1 Single-Ended Input Low Voltage -40°C +25°C +85°C MIN MAX MIN MAX MIN MAX VEE VCC - 1.62 VEE VCC - 1.62 VEE VCC -1.62 UNITS V VEE VCC - 1.475 VEE VCC - 1.475 VEE VCC -1.475 High Voltage of Differential Input VIHD VEE +1.2 VCC VEE + 1.2 VCC VEE +1.2 VCC V Low Voltage of Differential Input VILD VEE VCC - 0.095 VEE VCC - 0.095 VEE VCC - 0.095 V Differential Input Voltage VIHD VILD 0.095 VCC - VEE 0.095 VCC - VEE 0.095 VCC - VEE 3.0 0.095 3.0 0.095 Input High Current For VCC - VEE < 3.0V For VCC - VEE ≥ 3.0V 0.095 150 IIH CLK_ Input Low Current IILCLK -10 CLK_ Input Low Current IILCLK -150 +10 150 -10 +10 -150 -10 V 3.0 150 µA +10 µA -150 µA OUTPUTS (Q_, Q_) Single-Ended Output High Voltage VOH Figure 1 VCC - 1.025 VCC - 0.900 VCC - 1.025 VCC - 0.900 VCC - 1.025 VCC - 0.900 V Single-Ended Output Low Voltage VOL Figure 1 VCC - 1.93 VCC - 1.695 VCC - 1.93 VCC - 1.695 VCC - 1.93 VCC - 1.695 V VOH VOL Figure 1 670 950 670 950 670 950 mV MAX9311 VCC - 1.525 VCC - 1.325 VCC - 1.525 VCC - 1.325 VCC - 1.525 VCC - 1.325 MAX9313 VCC - 1.38 VCC - 1.26 VCC - 1.38 VCC - 1.26 VCC - 1.38 VCC - 1.26 Differential Output Voltage REFERENCE (VBB) Reference Voltage Output (Note 5) VBB IBB = ±0.5mA V POWER SUPPLY Supply Current (Note 6) IEE 75 82 95 mA _______________________________________________________________________________________ 3 MAX9311/MAX9313 1:10 Differential LVPECL/LVECL/HSTL Clock and Data Drivers AC ELECTRICAL CHARACTERISTICS (VCC - VEE = 2.25V to 3.8V, outputs loaded with 50Ω ±1% to VCC - 2V, input frequency = 1.5GHz, input transition time = 125ps (20% to 80%), CLKSEL = high or low, VIHD = VEE + 1.2V to VCC, VILD = VEE to VCC - 0.15V, VIHD - VILD = 0.15V to the smaller of 3V or VCC - VEE, unless otherwise noted. Typical values are at VCC - VEE = 3.3V, VIHD = VCC -1V, VILD = VCC -1.5V.) (Note 7) PARAMETER SYMBOL CONDITIONS -40°C +25°C +85°C UNITS MIN TYP MAX MIN TYP MA MIN TYP MAX 220 321 380 220 312 410 260 322 400 ps Differential Input-toOutput Delay tPLHD, tPHLD Output-toOutput Skew (Note 8) tSKOO 12 46 12 46 10 35 ps Part-to-Part Skew (Note 9) tSKPP 30 160 30 190 30 140 ps fIN = 1.5GHz, Clock pattern 1.2 2.5 1.2 2.5 fIN = 3.0GHz, Clock pattern 1.2 2.6 1.2 2.6 1.2 2.6 3Gbps, 223 -1 PRBS pattern 80 95 80 95 80 95 Added Random Jitter (Note 10) tRJ Added Deterministic Jitter (Note 10) tDJ Switching Frequency Output Rise/Fall Time (20% to 80%) Figure 2 VOH - VOL ≥ 350mV, Clock pattern, Figure 2 fMAX tR , t F 1.2 2.5 ps (RMS) 2.0 2.0 3.0 ps (p-p) 2.0 GHz VOH - VOL ≥ 500mV, Clock pattern, Figure 2 1.5 Figure 2 100 1.5 112 140 100 1.5 116 140 100 121 140 ps Note 1: Measurements are made with the device in thermal equilibrium. Note 2: Current into a pin is defined as positive. Current out of a pin is defined as negative. Note 3: Single-ended input operation using VBB is limited to VCC - VEE = 3.0V to 3.8V for the MAX9311 and VCC - VEE = 2.7V to 3.8V for the MAX9313. Note 4: DC parameters production tested at TA = +25°C. Guaranteed by design and characterization over the full operating temperature range. Note 5: Use VBB only for inputs that are on the same device as the VBB reference. Note 6: All pins open except VCC and VEE. Note 7: Guaranteed by design and characterization. Limits are set at ±6 sigma. Note 8: Measured between outputs of the same part at the signal crossing points for a same-edge transition. Note 9: Measured between outputs of different parts at the signal crossing points under identical conditions for a same-edge transition. Note 10:Device jitter added to the input signal. 4 _______________________________________________________________________________________ 1:10 Differential LVPECL/LVECL/HSTL Clock and Data Drivers OUTPUT AMPLITUDE (VOH - VOL) vs. FREQUENCY 70 65 60 MAX9311 toc02 130 0.7 125 TRANSITION TIME (ps) OUTPUT AMPLITUDE (V) 0.8 75 0.6 0.5 0.4 0.3 tR 120 115 tF 110 0.2 105 55 0.1 50 0 10 35 60 85 100 0 1000 TEMPERATURE (°C) 2000 3000 VIHD - VILD = 150mV 360 340 PROPAGATION DELAY (ps) tPLHD 310 309 308 307 tPHLD 306 10 35 60 85 PROPAGATION DELAY vs. TEMPERATURE 313 311 -15 TEMPERATURE (°C) PROPAGATION DELAY vs. HIGH VOLTAGE OF DIFFERENTIAL INPUT (VIHD) 312 -40 FREQUENCY (MHz) 305 MAX9311 toc05 -15 MAX9311 toc04 -40 PROPAGATION DELAY (ps) SUPPLY CURRENT (mA) 80 TRANSITION TIME vs. TEMPERATURE 0.9 MAX9311 toc01 85 MAX9311 toc03 SUPPLY CURRENT (IEE) vs. TEMPERATURE tPLHD 320 300 tPHLD 280 260 VIHD = VCC - 0.95V VILD = VCC - 1.1V 240 220 304 303 200 1.0 1.4 1.8 2.2 2.6 VIHD (V) 3.0 3.4 3.8 -40 -15 10 35 60 85 TEMPERATURE (°C) _______________________________________________________________________________________ 5 MAX9311/MAX9313 Typical Operating Characteristics (VCC = +3.3V, VEE = 0, VIHD = VCC - 0.95V, VILD = VCC - 1.25V, input transition time = 125ps (20% to 80%), fIN = 1.5GHz, outputs loaded with 50Ω to VCC - 2V, TA = +25°C, unless otherwise noted.) 1:10 Differential LVPECL/LVECL/HSTL Clock and Data Drivers MAX9311/MAX9313 Pin Description PIN 6 NAME FUNCTION 1, 9, 16, 25, 32 VCC Positive Supply Voltage. Bypass from VCC to VEE with 0.1µF and 0.01µF ceramic capacitors. Place the capacitors as close to the device as possible with the smaller value capacitor closest to the device. 2 CLKSEL Clock Select Input (Single-Ended). Drive low to select the CLK0, CLK0 input. Drive high to select the CLK1, CLK1 input. The CLKSEL threshold is VBB. If CLKSEL is not driven by a logic signal, use a 1kΩ pulldown to VEE to select CLK0, CLK0, or a 1kΩ pullup to VCC to select CLK1, CLK1. 3 CLK0 Noninverting Differential Clock Input 0. Internal 75kΩ pulldown resistor. 4 CLK0 Inverting Differential Clock Input 0. Internal 75kΩ pullup and pulldown resistors. 5 VBB Reference Output Voltage. Connect to the inverting or noninverting clock input to provide a reference for single-ended operation. When used, bypass with a 0.01µF ceramic capacitor to VCC; otherwise, leave open. 6 CLK1 Noninverting Differential Clock Input 1. Internal 75kΩ pulldown resistor. 7 CLK1 Inverting Differential Clock Input 1. Internal 75kΩ pullup and pulldown resistors. 8 VEE 10 Q9 Negative Supply Voltage Inverting Q9 Output. Typically terminate with 50Ω resistor to VCC - 2V. 11 Q9 Noninverting Q9 Output. Typically terminate with 50Ω resistor to VCC - 2V. 12 Q8 Inverting Q8 Output. Typically terminate with 50Ω resistor to VCC - 2V. 13 Q8 Noninverting Q8 Output. Typically terminate with 50Ω resistor to VCC - 2V. 14 Q7 Inverting Q7 Output. Typically terminate with 50Ω resistor to VCC - 2V. 15 Q7 Noninverting Q7 Output. Typically terminate with 50Ω resistor to VCC - 2V. 17 Q6 Inverting Q6 Output. Typically terminate with 50Ω resistor to VCC - 2V. 18 Q6 Noninverting Q6 Output. Typically terminate with 50Ω resistor to VCC - 2V. 19 Q5 Inverting Q5 Output. Typically terminate with 50Ω resistor to VCC - 2V. 20 Q5 Noninverting Q5 Output. Typically terminate with 50Ω resistor to VCC - 2V. 21 Q4 Inverting Q4 Output. Typically terminate with 50Ω resistor to VCC - 2V. 22 Q4 Noninverting Q4 Output. Typically terminate with 50Ω resistor to VCC - 2V. 23 Q3 Inverting Q3 Output. Typically terminate with 50Ω resistor to VCC - 2V. 24 Q3 Noninverting Q3 Output. Typically terminate with 50Ω resistor to VCC - 2V. 26 Q2 Inverting Q2 Output. Typically terminate with 50Ω resistor to VCC - 2V. 27 Q2 Noninverting Q2 Output. Typically terminate with 50Ω resistor to VCC - 2V. 28 Q1 Inverting Q1 Output. Typically terminate with 50Ω resistor to VCC - 2V. 29 Q1 Noninverting Q1 Output. Typically terminate with 50Ω resistor to VCC - 2V. 30 Q0 Inverting Q0 Output. Typically terminate with 50Ω resistor to VCC - 2V. 31 Q0 Noninverting Q0 Output. Typically terminate with 50Ω resistor to VCC - 2V. _______________________________________________________________________________________ 1:10 Differential LVPECL/LVECL/HSTL Clock and Data Drivers The MAX9311/MAX9313 are low skew, 1-to-10 differential drivers designed for clock and data distribution. A 2:1 mux selects between the two differential inputs, CLK0, CLK0 and CLK1, CLK1. The 2:1 mux is switched by the single-ended CLKSEL input. A logic low selects the CLK0, CLK0 input. A logic high selects the CLK1, CLK1 input. The logic threshold for CLKSEL is set by an internal VBB voltage reference. The CLKSEL input can be driven to VCC and VEE or by a single-ended LVPECL/ LVECL signal. The selected input is reproduced at 10 differential outputs. For interfacing to differential HSTL and LVPECL signals, these devices operate over a +2.25V to +3.8V supply range, allowing high-performance clock or data distribution in systems with a nominal +2.5V or +3.3V supply. For differential LVECL operation, these devices operate from a -2.25V to -3.8V supply. The differential inputs can be configured to accept single-ended inputs when operating at approximately VCC VEE = +3.0V to +3.8V for the MAX9311 or VCC - VEE = +2.7V to +3.8V for the MAX9313. This is accomplished by connecting the on-chip reference voltage, VBB, to an input as a reference. For example, the differential CLK0, CLK0 input is converted to a noninverting, single-ended input by connecting VBB to CLK0 and connecting the single-ended input to CLK0. Similarly, an inverting input is obtained by connecting VBB to CLK0 and connecting the single-ended input to CLK0. With a differential input configured as single-ended (using V BB), the singleended input can be driven to VCC and VEE or with a single-ended LVPECL/LVECL signal. When a differential input is configured as a single-ended input (using VBB), the approximate supply range is VCC VEE = +3.0V to +3.8V for the MAX9311 and VCC - VEE = +2.7V to +3.8V for the MAX9313. This is because one of the inputs must be VEE + 1.2V or higher for proper operation of the input stage. VBB must be at least VEE + 1.2V because it becomes the high-level input when the other (single-ended) input swings below it. Therefore, minimum VBB = VEE + 1.2V. The minimum VBB output for the MAX9311 is VCC 1.525V and the minimum VBB output for the MAX9313 is VCC - 1.38V. Substituting the minimum VBB output for each device into VBB = VEE + 1.2V results in a minimum supply of 2.725V for the MAX9311 and 2.58V for the MAX9313. Rounding up to standard supplies gives the single-ended operating supply ranges of VCC - VEE = 3.0V to 3.8V for the MAX9311 and VCC - VEE = 2.7V to 3.8V for the MAX9313. When using the VBB reference output, bypass it with a 0.01µF ceramic capacitor to VCC. If the VBB reference is not used, it can be left open. The VBB reference can source or sink 0.5mA, which is sufficient to drive two inputs. Use VBB only for inputs that are on the same device as the VBB reference. The maximum magnitude of the differential input from CLK_ to CLK_ is 3.0V or VCC - VEE, whichever is less. This limit also applies to the difference between any reference voltage input and a single-ended input. The differential inputs have bias resistors that drive the outputs to a differential low when the inputs are open. The inverting inputs (CLK0 and CLK1) are biased with a 75kΩ pullup to VCC and a 75kΩ pulldown to VEE. The noninverting inputs (CLK0 and CLK1) are biased with a 75kΩ pulldown to VEE. The single-ended CLKSEL input does not have a bias resistor. If not driven, pull CLKSEL up or down with a 1kHz resistor (see Pin Description). Specifications for the high and low voltages of a differential input (VIHD and VILD) and the differential input voltage (VIHD - VILD) apply simultaneously (VILD cannot be higher than VIHD). Output levels are referenced to VCC and are considered LVPECL or LVECL, depending on the level of the VCC supply. With VCC connected to a positive supply and VEE connected to GND, the outputs are LVPECL. The outputs are LVECL when VCC is connected to GND and VEE is connected to a negative supply. A single-ended input of at least VBB ±95mV or a differential input of at least 95mV switches the outputs to the V OH and V OL levels specified in the DC Electrical Characteristics table. Applications Information Supply Bypassing Bypass VCC to VEE with high-frequency surface-mount ceramic 0.1µF and 0.01µF capacitors in parallel as close to the device as possible, with the 0.01µF value capacitor closest to the device. Use multiple parallel vias for low inductance. When using the VBB reference output, bypass it with a 0.01µF ceramic capacitor to VCC (if the VBB reference is not used, it can be left open). Traces Input and output trace characteristics affect the performance of the MAX9311/MAX9313. Connect each signal of a differential input or output to a 50Ω characteristic impedance trace. Minimize the number of vias to prevent impedance discontinuities. Reduce reflections by maintaining the 50Ω characteristic impedance through connectors and across cables. Reduce skew within a _______________________________________________________________________________________ 7 MAX9311/MAX9313 Detailed Description MAX9311/MAX9313 1:10 Differential LVPECL/LVECL/HSTL Clock and Data Drivers differential pair by matching the electrical length of the traces. Chip Information TRANSISTOR COUNT: 250 Output Termination Terminate outputs through 50Ω to VCC - 2V or use an equivalent Thevenin termination. When a single-ended signal is taken from a differential output, terminate both outputs. For example, if Q0 is used as a single-ended output, terminate both Q0 and Q0. CLK_ VIH VBB CLK_ VIL (CONNECTED TO CLK_) VOH Q_ VOH - VOL VOL Q_ Figure 1. Switching with Single-Ended Input CLK_ VIHD VIHD - VILD VILD CLK_ tPLHD tPHLD VOH Q_ VOH - VOL Q_ VOL 80% 80% 0 (DIFFERENTIAL) (Q_) - (Q_) 0 (DIFFERENTIAL) 20% 20% tR tF Figure 2. Differential Transition Time and Propagation Delay Timing Diagram 8 _______________________________________________________________________________________ 1:10 Differential LVPECL/LVECL/HSTL Clock and Data Drivers Q0 Q0 VCC Q1 Q1 75kΩ Q2 CLK0 Q2 CLK0 Q3 75kΩ 75kΩ Q3 VEE Q4 VEE 0 VCC 1 Q4 Q5 Q5 75kΩ Q6 CLK1 Q6 CLK1 Q7 75kΩ 75kΩ Q7 VEE CLKSEL VEE Q8 Q8 VBB Q9 Q9 _______________________________________________________________________________________ 9 MAX9311/MAX9313 Functional Diagram 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.) 32L/48L TQFP EPS MAX9311/MAX9313 1:10 Differential LVPECL/LVECL/HSTL Clock and Data Drivers 10 ______________________________________________________________________________________ 1:10 Differential LVPECL/LVECL/HSTL Clock and Data Drivers 32L TQFP, 5x5x01.0.EPS ______________________________________________________________________________________ 11 MAX9311/MAX9313 Package Information (continued) (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.) Package Information (continued) (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.) 32L QFN.EPS MAX9311/MAX9313 1:10 Differential LVPECL/LVECL/HSTL Clock and Data Drivers 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. 12 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2002 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.