Single LVDS/Anything-to-LVPECL Translator
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1 9-2808; Rev 0; 4/03 Single LVDS/Anything-to-LVPECL Translator General Description The is a fully differential, high-speed, anything-to-lvpecl translator designed for signal rates up to 2GHz. The s extremely low propagation delay and high speed make it ideal for various highspeed network routing and backplane applications. The accepts any differential input signal within the supply rails and with minimum amplitude of 00mV. 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. The 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 42ps (typ) Propagation Delays 30ps (max) Pulse Skew 2ps RMS (max) Random Jitter Minimum 00mV 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 LAN WAN DSLAM DLC Ordering Information PART TEMP RANGE P-PACKAGE EUA -40 C to +85 C 8 µmax Functional Diagram Pin Configuration TOP VIEW V CC 8 V CC LVDS/ANY LVPECL SGLE TRANSLATOR GND 4 5 GND µmax Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at , or visit Maxim s website at
2 ABSOLUTE MAXIMUM RATGS V CC to GND V to +4.V Inputs (, ) V to (V CC + 0.3V) to...±3.0v Continuous Output Current...50mA Surge Output Current...00mA Continuous Power Dissipation (T A = +70 C) 8-Pin µmax (derate 5.9mW/ C above +70 C) mW θ JA in Still Air C/W Junction Temperature C Storage Temperature Range C to +50 C ESD Protection Human Body Model (,,, )... 2kV Soldering Temperature (0s) 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 (V CC = +3.0V to +3.6V, differential input voltage V ID = 0.V to 3.0V, input voltage (V, V ) = 0 to V CC, input common-mode voltage V CM = V to ( V), LVPECL outputs terminated with 50Ω ±% to 2.0V, T A = -40 C to +85 C. Typical values are at V CC = +3.3V, V ID = 0.2V, input common-mode voltage V CM =.2V, T A = +25 C, unless otherwise noted.) (Notes, 2, 3) PARAMETER SYMBOL CONDITIONS DIFFERENTIAL PUTS (, ) Differential Input Threshold -40 C +25 C +85 C M TYP MAX M TYP MAX M TYP MAX V THD mv Input Current I, I V, V = V CC or 0V µa Input Common- Mode Voltage LVPECL PUTS (, ) V CM Figure UNITS V Single-Ended Output High Voltage V OH V Single-Ended Output Low Voltage V OL V Differential Output Voltage V OH - V OL mv POWER SUPPLY Supply Current I CC All pins open except V CC, G N D ma 2
3 AC ELECTRICAL CHARACTERISTICS (V CC = +3.0V to +3.6V, differential input voltage V ID = 0.V to.2v, input frequency.34ghz, differential input transition time = 25ps (20% to 80%), input voltage (V, V ) = 0 to V CC, input common-mode voltage V CM = V to ( V), outputs terminated with 50Ω ±% to 2.0V, T A = -40 C to +85 C. Typical values are at V CC = +3.3V, V ID = 0.2V, input common-mode voltage V CM =.2V, T A = +25 C, unless otherwise noted.) (Note 4) PARAMETER SYMBOL CONDITIONS M TYP MAX UNITS Switching Frequency f MAX V OH - V OL 250mV GHz Propagation Delay Low to High t PLH Figure ps Propagation Delay High to Low t PHL Figure ps Pulse Skew tplh -tphl t SKEW Figure 2 (Note 5) 6 30 ps Output Low-to-High Transition Time (20% to 80%) Output High-to-Low Transition Time (20% to 80%) t R Figure ps t F Figure ps Added Random Jitter t RJ f =.34GHz (Note 6) ps (RMS) Note : Measurements are made with the device in thermal equilibrium. All voltages are referenced to ground except V THD and V ID. 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 T A = +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: t SKEW is the magnitude difference of differential propagation delays for the same output under the same conditions; t SKEW = t PHL - t PLH. Note 6: Device jitter added to the input signal. Typical Operating Characteristics (V CC = +3.3V, differential input voltage V ID = 0.2V, V CM =.2V, input frequency = 500MHz, outputs terminated with 50Ω ±% to 2.0V, T A = +25 C, unless otherwise noted.) SUPPLY CURRENT vs. FREQUENCY PUT AMPLITUDE vs. FREQUENCY NO LOAD toc toc02 SUPPLY CURRENT (ma) PUT AMPLITUDE (mv) FREQUENCY (MHz) FREQUENCY (MHz) 3
4 Typical Operating Characteristics (continued) (V CC = +3.3V, differential input voltage V ID = 0.2V, V CM =.2V, input frequency = 500MHz, outputs terminated with 50Ω ±% to 2.0V, T A = +25 C, unless otherwise noted.) PROPAGATION DELAY (ps) PROPAGATION DELAY vs. TEMPERATURE t PLH t PHL toc03 PUT RISE/FALL TIME (ps) PUT RISE/FALL TIME vs. TEMPERATURE t F t R toc TEMPERATURE ( C) TEMPERATURE ( C) Detailed Description The is a fully differential, high-speed, anything-to-lvpecl translator designed for signal rates up to 2GHz. The s extremely low propagation delay and high speed make it ideal for various highspeed network routing and backplane applications. The accepts any differential input signals within the supply rails and with a minimum amplitude of 00mV. 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. Inputs Inputs have a wide common-mode range of V to ( V), which accommodates any differential signals within rails, and requires a minimum of 00mV to switch the outputs. This allows the inputs to support virtually any differential signaling standard. LVPECL Outputs The outputs are emitter followers that require external resistive paths to a voltage source (V T = V CC - 2.0V typ) more negative than worst-case V OL for proper P NAME FUNCTION Pin Description, 8 V CC Positive Supply. Bypass from V CC to GND with 0.µF and 0.0µF ceramic capacitors. Place the capacitors as close to the device as possible with the smaller value capacitor closest to the device. 2 LVDS/Anything Noninverting Input 3 LVDS/Anything Inverting Input 4, 5 GND Power Supply Ground Connection 6 7 Differential LVPECL Inverting Output. Terminate with 50Ω ±% to 2V. Differential LVPECL Noninverting Output. Terminate with 50Ω ±% to 2V. static and dynamic operation. When properly terminated, the outputs generate steady-state voltage levels, V OL or V OH with fast transition edges between state levels. Output current always flows into the termination during proper operation. 4
5 Applications Information Output Termination Terminate the outputs with 50Ω to ( 2V) or use equivalent Thevenin terminations. Terminate and with identical termination on each for low-output distortion. When a single-ended signal is taken from the differential output, terminate both and. 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. Supply Bypassing Bypass V CC to ground with high-frequency surfacemount ceramic 0.µF and 0.0µF capacitors. Place the capacitors as close to the device as possible with the 0.0µF 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. V CC GND V ID V ID Figure. Input Definitions t PHL 80% V ID V OH - V OL V OH - V OL V CM (MAX) = V V CM (M) = V 0V DIFFERENTIAL 80% DIFFERENTIAL PUT 0V DIFFERENTIAL WAVEFORM V OH - V OL 20% 20% - t R t F Figure 2. Differential Input-to-Output Propagation Delay Timing Diagram t PLH V OH V OL TRANSISTOR COUNT: 64 PROCESS: Bipolar Chip Information 5
6 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 0.6±0. 0.6±0. 8 ÿ 0.50±0. D TOP VIEW E H 4X S BOTTOM VIEW 8 DIM A A M MAX BSC A b c D e E H L α S CHES BSC MILLIMETERS M MAX BSC BSC 8LUMAXD.EPS A2 A A e b c L α FRONT VIEW SIDE VIEW PROPRIETARY FORMATION TITLE: PACKAGE LE, 8L umax/usop APPROVAL DOCUMENT CONTROL NO. REV J 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, 20 San Gabriel Drive, Sunnyvale, CA Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.
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9-36; Rev ; 9/ SC7/SOT3-8, 5mA I, Rail-to-Rail I/O General Description The op amps deliver 4mW per channel into 3Ω from ultra-small SC7/SOT3 packages making them ideal for mono/stereo headphone drivers
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General Description The MAX31091 is a low-cost clock generator that is factory trimmed to output frequencies from 200kHz to 66.6MHz with a nominal accuracy of ±0.25%. The device can also produce a center-spread-spectrum
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19-4558; Rev 1; 3/10 3.3V Dual-Output LVPECL Clock Oscillator General Description The is a dual-output, low-jitter clock oscillator capable of producing frequency output pair combinations ranging from
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Rev ; 5/7 1MHz to 13MHz Spread-Spectrum General Description The is a spread-spectrum clock modulator IC that reduces EMI in high-clock, frequency-based, digital electronic equipment. Using an integrated
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19-3472; Rev ; 1/4 Quad SPST Switches General Description The quad single-pole/single-throw (SPST) switch operates from a single +2V to +5.5V supply and can handle signals greater than the supply rail.
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Precision Low Power 1:4 LVPECL Fanout Buffer/Translator with Internal Termination General Description The is a 2.5V/3.3V precision, highspeed, fully differential 1:4 LVPECL fanout buffer. Optimized to
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