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MAX3291CPD Datasheet(PDF) 5 Page - Maxim Integrated Products |
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MAX3291CPD Datasheet(HTML) 5 Page - Maxim Integrated Products |
5 / 16 page RS-485/RS-422 Transceivers with Preemphasis for High-Speed, Long-Distance Communication _______________________________________________________________________________________ 5 TYPICAL PREEMPHASIS WAVEFORM 100ns/div VY - VZ 2V/ div 2500 0 0 1000 PREEMPHASIS INTERVAL vs. RPSET (CPSET = 0.1µF) 250 500 2250 RPSET (kΩ) 200 100 300 400 600 500 800 700 900 2000 1750 750 1500 1250 1000 NOTE A 0 400 200 800 NOTE A 600 1000 1200 0 1000 500 1500 2000 RPRE AND tPRE vs. tBAUD tBAUD (ns) 0 1.0 0.5 2.0 1.5 2.5 3.0 4.0 3.5 4.5 10 30 40 50 20 60 70 80 90 100 DRIVER DIFFERENTIAL OUTPUT VOLTAGE vs. RDIFF RDIFF (Ω) STRONG NORMAL 30.0 35.0 32.5 40.0 37.5 42.5 47.5 45.0 50.0 -40 0 20 -20 40 60 80 100 DRIVER PROPAGATION DELAY vs. TEMPERATURE TEMPERATURE (°C) CL1 = CL2 = 50pF 2.00 2.50 2.25 3.00 2.75 3.25 3.50 4.00 3.75 4.25 -40 0 20 -20 40 60 80 100 DRIVER DIFFERENTIAL OUTPUT VOLTAGE vs. TEMPERATURE TEMPERATURE (°C) STRONG (VODP) RDIFF = 54Ω NORMAL (VOD) 40.0 45.0 42.5 50.0 47.5 52.5 57.5 55.0 60.0 -40 0 20 -20 40 60 80 100 RECEIVER PROPAGATION DELAY vs. TEMPERATURE TEMPERATURE (°C) CL = 50pF RECEIVER PROPAGATION DELAY 20ns/div VA - VB RO 2.5V/ div 5V/ div __________________________________________Typical Operating Characteristics (VCC = +5V, TA = +25°C, unless otherwise noted.) Note A: Dotted line represents region in which preemphasis may not work in systems with excessive power-supply noise. See Preemphasis at Low Data Rates. |
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