MAX9121 Maxim, MAX9121 Datasheet
MAX9121
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MAX9121 Summary of contents
Page 1
... MAX9122 features integrated parallel termination resis- tors (nominally 107Ω), which eliminate the requirement for four discrete termination resistors and reduce stub lengths. The MAX9121 inputs are high impedance and require an external termination resistor when used in a point-to-point connection. The devices support a wide common-mode input range of ...
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... -40°C to +85°C. Typical values are PARAMETER SYMBOL LVDS INPUTS (IN_+, IN_-) Differential Input High Threshold Differential Input Low Threshold Input Current (MAX9121 Power-Off Input Current I INOFF (MAX9121) Input Resistor 1 Input Resistor 2 ...
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... Differential Part-to-Part Skew (Note 8) Rise-Time Fall-Time Disable Time High to Z Disable Time Low to Z Enable Time Z to High Enable Time Z to Low Maximum Operating Frequency (Note 9) _______________________________________________________________________________________ Quad LVDS Line Receivers with | = 0.1V to 1.0V, common-mode voltage +3.3V +25°C, unless otherwise noted.) (Note 1) ...
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... CC Note the magnitude difference of any differential propagation delays between parts operating over rated conditions. SKD4 Note 9: f generator output conditions: rise-time = fall-time = 1ns (0% to 100%), 50% duty cycle, V MAX MAX9121/MAX9122 output criteria: 60% to 40% duty cycle +3.3V +1.2V 0.2V SUPPLY CURRENT vs ...
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Integrated Termination and Flow-Through Pinout (V = +3.3V +1.2V 0.2V OUTPUT LOW VOLTAGE vs. SUPPLY VOLTAGE 100 3.0 3.3 SUPPLY VOLTAGE (V) DIFFERENTIAL ...
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... The internal termination saves board space, eases lay- out, and reduces stub length compared to an external termination resistor. In other words, the transmission line is terminated on the IC. The fail-safe feature of the MAX9121/MAX9122 sets an output high when: • Inputs are open. • Inputs are undriven and shorted. ...
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... R IN1 IN_- close to the device as possible, with the smaller valued capacitor closest to V Input trace characteristics affect the performance of the MAX9121/MAX9122. Use controlled-impedance PC - 0.3V CC board traces to match the cable characteristic imped- ance. The termination resistor is also matched to this characteristic impedance. Eliminate reflections and ensure that noise couples as common mode by running the differential traces close together ...
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... Termination resis- tance values may range between 90Ω to 132Ω, depending on the characteristic impedance of the transmission medium. When using the MAX9121, minimize the distance between the input termination resistors and the MAX9121 receiver inputs. Use 1% surface-mount resis- tors. Termination OUT_ C L ...
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... OUTPUT WHEN V = +100mV ID Figure 5. High-Impedance Delay Waveforms Because the MAX9121/MAX9122 feature a flow-through pinout, no special layout precautions are required. Keep the LVDS and any other digital signals separated from each other to reduce crosstalk. For LVDS applications, a four-layer PC board that pro- vides separate power, ground, LVDS signals, and input signals is recommended ...
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... IN2- IN3+ OUT3 107Ω IN3- IN4+ OUT4 107Ω IN4 MAX9121 GND IN1 IN1 OUT1 IN2 OUT2 MAX9121 IN2 MAX9122 IN3 GND IN3 OUT3 IN4 OUT4 IN4 TSSOP/SO Functional Diagram ...
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Integrated Termination and Flow-Through Pinout ______________________________________________________________________________________ Quad LVDS Line Receivers with Package Information 11 ...
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... Quad LVDS Line Receivers with Integrated Termination and Flow-Through Pinout 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. ...