19-2808; Rev 0; 4/03 Single LVDS/Anything-to-LVPECL Translator The MAX9375 is available in an 8-pin µMAX package and operates from a single +3.3V supply over the -40°C to +85°C temperature range. Features ♦ Guaranteed 2GHz Switching Frequency ♦ Accepts LVDS/LVPECL/Anything Inputs ♦ 421ps (typ) Propagation Delays ♦ 30ps (max) Pulse Skew ♦ 2psRMS (max) Random Jitter ♦ Minimum 100mV Differential Input to Guarantee AC Specifications ♦ Temperature-Compensated LVPECL Output ♦ +3.0V to +3.6V Power-Supply Operating Range ♦ >2kV ESD Protection (Human Body Model) Applications Backplane Logic Standard Translation Ordering Information PART LAN MAX9375EUA TEMP RANGE PIN-PACKAGE -40°C to +85°C 8 µMAX WAN DSLAM DLC Pin Configuration Functional Diagram TOP VIEW VCC 1 IN 2 7 IN 3 6 OUT GND 4 5 MAX9375 8 VCC OUT LVPECL LVDS/ANY SINGLE TRANSLATOR GND µMAX ________________________________________________________________ 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 MAX9375 General Description The MAX9375 is a fully differential, high-speed, anything-to-LVPECL translator designed for signal rates up to 2GHz. The MAX9375’s extremely low propagation delay and high speed make it ideal for various highspeed network routing and backplane applications. The MAX9375 accepts any differential input signal within the supply rails and with minimum amplitude of 100mV. Inputs are fully compatible with the LVDS, LVPECL, HSTL, and CML differential signaling standards. Outputs are LVPECL and have sufficient current to drive 50Ω transmission lines. MAX9375 Single LVDS/Anything-to-LVPECL Translator ABSOLUTE MAXIMUM RATINGS Junction Temperature ......................................................+150°C Storage Temperature Range .............................-65°C to +150°C ESD Protection Human Body Model (IN, IN, OUT, OUT) .........................≥ 2kV Soldering Temperature (10s) ...........................................+300°C VCC to GND ...........................................................-0.3V to +4.1V Inputs (IN, IN) .............................................-0.3V to (VCC + 0.3V) IN to IN................................................................................±3.0V Continuous Output Current .................................................50mA Surge Output Current .......................................................100mA Continuous Power Dissipation (TA = +70°C) 8-Pin µMAX (derate 5.9mW/°C above +70°C) ..........470.6mW θJA in Still Air............................................................+170°C/W 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 = +3.0V to +3.6V, differential input voltage |VID| = 0.1V to 3.0V, input voltage (VIN, V IN) = 0 to VCC, input common-mode voltage VCM = 0.05V to (VCC - 0.05V), LVPECL outputs terminated with 50Ω ±1% to VCC - 2.0V, TA = -40°C to +85°C. Typical values are at VCC = +3.3V, |VID| = 0.2V, input common-mode voltage VCM = 1.2V, TA = +25°C, unless otherwise noted.) (Notes 1, 2, 3) PARAMETER SYMBOL CONDITIONS -40°C MIN TYP +25°C MAX MIN +100 -100 -20 +20 0.05 VCC 0.05 TYP +85°C MAX MIN +100 -100 -20 +20 0.05 VCC 0.05 TYP MAX UNITS DIFFERENTIAL INPUTS (IN, IN) Differential Input Threshold VTHD Input Current IIN, I IN Input CommonMode Voltage VCM -100 VIN, V IN = VCC or 0V Figure 1 +100 mV -20 +20 µA 0.05 VCC 0.05 V LVPECL OUTPUTS (OUT, OUT) Single-Ended Output High Voltage VOH VCC - VCC - VCC 1.085 1.017 0.880 VCC - VCC 1.025 0.983 VCC 0.880 VCC 1.025 VCC - VCC 0.966 0.880 V Single-Ended Output Low Voltage VOL VCC - VCC - VCC 1.830 1.753 1.620 VCC - VCC 1.810 1.710 VCC 1.620 VCC 1.810 VCC - VCC 1.692 1.620 V Differential Output VOH - VOL Voltage 595 725 595 725 595 725 mV POWER SUPPLY Supply Current 2 ICC All pins open except VCC, GND 10 18 12 18 14 _______________________________________________________________________________________ 18 mA Single LVDS/Anything-to-LVPECL Translator (VCC = +3.0V to +3.6V, differential input voltage |VID| = 0.1V to 1.2V, input frequency ≤ 1.34GHz, differential input transition time = 125ps (20% to 80%), input voltage (VIN, V IN) = 0 to VCC, input common-mode voltage VCM = 0.05V to (VCC - 0.05V), outputs terminated with 50Ω ±1% to VCC - 2.0V, TA = -40°C to +85°C. Typical values are at VCC = +3.3V, |VID| = 0.2V, input common-mode voltage VCM = 1.2V, TA = +25°C, unless otherwise noted.) (Note 4) MIN TYP Switching Frequency PARAMETER SYMBOL fMAX VOH - VOL ≥ 250mV 2.0 2.5 Propagation Delay Low to High tPLH Figure 2 250 421 600 Propagation Delay High to Low tPHL Figure 2 250 421 600 ps 6 30 ps Pulse Skew |tPLH -tPHL| tSKEW CONDITIONS Figure 2 (Note 5) MAX UNITS GHz ps Output Low-to-High Transition Time (20% to 80%) tR Figure 2 116 220 ps Output High-to-Low Transition Time (20% to 80%) tF Figure 2 116 220 ps Added Random Jitter tRJ fIN = 1.34GHz (Note 6) 0.7 2 ps(RMS) Note 1: Measurements are made with the device in thermal equilibrium. All voltages are referenced to ground except VTHD and VID. Note 2: Current into a pin is defined as positive. Current out of a pin is defined as negative. Note 3: DC parameters production tested at TA = +25°C and guaranteed by design and characterization over the full operating temperature range. Note 4: Guaranteed by design and characterization, not production tested. Limits are set at ±6 sigma. Note 5: tSKEW is the magnitude difference of differential propagation delays for the same output under the same conditions; tSKEW = |tPHL - tPLH|. Note 6: Device jitter added to the input signal. Typical Operating Characteristics (VCC = +3.3V, differential input voltage |VID| = 0.2V, VCM = 1.2V, input frequency = 500MHz, outputs terminated with 50Ω ±1% to VCC - 2.0V, TA = +25°C, unless otherwise noted.) OUTPUT AMPLITUDE vs. FREQUENCY SUPPLY CURRENT vs. FREQUENCY 800 OUTPUT AMPLITUDE (mV) 20 15 10 MAX9375 toc02 NO LOAD 25 SUPPLY CURRENT (mA) 900 MAX9375 toc01 30 700 600 500 400 5 300 0 0 500 1000 FREQUENCY (MHz) 1500 2000 0 500 1000 1500 2000 FREQUENCY (MHz) _______________________________________________________________________________________ 3 MAX9375 AC ELECTRICAL CHARACTERISTICS Typical Operating Characteristics (continued) (VCC = +3.3V, differential input voltage |VID| = 0.2V, VCM = 1.2V, input frequency = 500MHz, outputs terminated with 50Ω ±1% to VCC - 2.0V, TA = +25°C, unless otherwise noted.) PROPAGATION DELAY vs. TEMPERATURE OUTPUT RISE/FALL TIME vs. TEMPERATURE 430 OUTPUT RISE/FALL TIME (ps) 440 tPLH 420 tPHL 410 400 MAX9375 toc04 130 MAX9375 toc03 450 PROPAGATION DELAY (ps) MAX9375 Single LVDS/Anything-to-LVPECL Translator 125 120 tF 115 tR 110 105 390 100 -40 -15 10 35 60 85 -40 TEMPERATURE (°C) -15 10 35 60 85 TEMPERATURE (°C) Detailed Description The MAX9375 is a fully differential, high-speed, anything-to-LVPECL translator designed for signal rates up to 2GHz. The MAX9375’s extremely low propagation delay and high speed make it ideal for various highspeed network routing and backplane applications. The MAX9375 accepts any differential input signals within the supply rails and with a minimum amplitude of 100mV. Inputs are fully compatible with the LVDS, LVPECL, HSTL, and CML differential signaling standards. Outputs are LVPECL and have sufficient current to drive 50Ω transmission lines. Pin Description PIN NAME FUNCTION 1, 8 VCC 2 IN Positive Supply. Bypass from VCC to GND 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. LVDS/Anything Noninverting Input 3 IN LVDS/Anything Inverting Input 4, 5 GND Power Supply Ground Connection Inputs 6 OUT Inputs have a wide common-mode range of 0.05V to (VCC - 0.05V), which accommodates any differential signals within rails, and requires a minimum of 100mV to switch the outputs. This allows the MAX9375 inputs to support virtually any differential signaling standard. Differential LVPECL Inverting Output. Terminate with 50Ω ±1% to VCC - 2V. 7 OUT Differential LVPECL Noninverting Output. Terminate with 50Ω ±1% to VCC - 2V. LVPECL Outputs The MAX9375 outputs are emitter followers that require external resistive paths to a voltage source (VT = VCC - 2.0V typ) more negative than worst-case VOL for proper 4 static and dynamic operation. When properly terminated, the outputs generate steady-state voltage levels, VOL or VOH with fast transition edges between state levels. Output current always flows into the termination during proper operation. _______________________________________________________________________________________ Single LVDS/Anything-to-LVPECL Translator Output Termination Terminate the outputs with 50Ω to (VCC - 2V) or use equivalent Thevenin terminations. Terminate OUT and OUT with identical termination on each for low-output distortion. When a single-ended signal is taken from the differential output, terminate both OUT and OUT. Ensure that output currents do not exceed the current limits as specified in the Absolute Maximum Ratings. Under all operating conditions, the device’s total thermal limits should be observed. MAX9375 Applications Information VCC VID VCM (MAX) = VCC - 0.05V VID VCM (MIN) = 0.05V GND Supply Bypassing Bypass VCC to ground with high-frequency surfacemount ceramic 0.1µF and 0.01µF capacitors. Place the capacitors as close to the device as possible with the 0.01µF capacitor closest to the device pins. Traces Circuit board trace layout is very important to maintain the signal integrity of high-speed differential signals. Maintaining integrity is accomplished in part by reducing signal reflections and skew, and increasing common-mode noise immunity. Signal reflections are caused by discontinuities in the 50Ω characteristic impedance of the traces. Avoid discontinuities by maintaining the distance between differential traces, not using sharp corners or using vias. Maintaining distance between the traces also increases common-mode noise immunity. Reducing signal skew is accomplished by matching the electrical length of the differential traces. Figure 1. Input Definitions IN VID 0V DIFFERENTIAL IN tPHL tPLH VOH OUT VOH - VOL VOL OUT 80% VOH - VOL 80% DIFFERENTIAL OUTPUT WAVEFORM 0V DIFFERENTIAL VOH - VOL 20% 20% OUT - OUT tR tF Figure 2. Differential Input-to-Output Propagation Delay Timing Diagram Chip Information TRANSISTOR COUNT: 614 PROCESS: Bipolar _______________________________________________________________________________________ 5 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.) 4X S 8 8 INCHES DIM A A1 A2 b E ÿ 0.50±0.1 H c D e E H 0.6±0.1 L 1 1 α 0.6±0.1 S BOTTOM VIEW D MIN 0.002 0.030 MAX 0.043 0.006 0.037 0.014 0.010 0.007 0.005 0.120 0.116 0.0256 BSC 0.120 0.116 0.198 0.188 0.026 0.016 6∞ 0∞ 0.0207 BSC 8LUMAXD.EPS MAX9375 Single LVDS/Anything-to-LVPECL Translator MILLIMETERS MAX MIN 0.05 0.75 1.10 0.15 0.95 0.25 0.36 0.13 0.18 2.95 3.05 0.65 BSC 2.95 3.05 4.78 5.03 0.41 0.66 0∞ 6∞ 0.5250 BSC TOP VIEW A1 A2 A α c e b L SIDE VIEW FRONT VIEW PROPRIETARY INFORMATION TITLE: PACKAGE OUTLINE, 8L uMAX/uSOP APPROVAL DOCUMENT CONTROL NO. 21-0036 REV. J 1 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. 6 _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2003 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.