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SP485ECP-L Datasheet(PDF) 2 Page - Exar Corporation |
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SP485ECP-L Datasheet(HTML) 2 Page - Exar Corporation |
2 / 12 page 2 Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 50-668-707 • www.exar.com SP48E,485E_00_2808 ABSOLUTE MAXIMUM RATINGS These are stress ratings only and functional operation of the device at these ratings or any other above those indicated in the operation sections of the specifications below is not implied. Exposure to absolute maximum rating conditions for extended periods of time may affect reliability. V CC.......................................................................+7V Input Voltages Logic.........................-0.3V to (Vcc + 0.5V) Drivers......................-0.3V to (Vcc + 0.5V) Receivers.........................................+/-15V ELECTRICAL CHARACTERISTICS T MIN to TMAX and VCC = +5.0V +/-5% unless otherwise noted. PARAMETERS MIN. TYP. MAX. UNITS CONDITIONS SP481E/SP485E DRIVER DC Characteristics Differential Output Voltage GND Vcc Volts Unloaded; R = ∞ ; see Figure 1 Differential Output Voltage 2 Vcc Volts With Load; R = 50Ω (RS-422); see Figure 1 Differential Output Voltage .5 Vcc Volts With Load; R = 27Ω (RS-485); see Figure 1 Change in Magnitude of Driver Differential Output Voltage for Complimentary states 0.2 Volts R = 27Ω or R = 50Ω; see Figure 1 Driver Common Mode Output Voltage 3 Volts R = 27Ω or R = 50Ω; see Figure 1 Input High Voltage 2.0 Volts Applies to DE, DI, RE Input Low Voltage 0.8 Volts Applies to DE, DI, RE Input Current +/-0 µA Applies to DE, DI, RE Driver Short Circuit Current V OUT = HIGH +/-250 mA -7V ≤ V O ≤ +12V V OUT = LOW +/-250 mA -7V ≤ V O ≤ +12V SP481E/SP485E DRIVER AC Characteristics Max. Transmission Rate 0 Mbps RE = 5V, DE = 5V; R DIFF = 54Ω, C L = CL2 = 00pF Driver Input to Output, t PLH 20 30 60 ns See Figures 3 & 5, R DIFF = 54Ω, C L = CL2 = 00pF Driver Input to Output, t PLH (SP485EMN ONLY) 20 30 80 ns Driver Input to Output, t PHL 20 30 60 ns See Figures 3 & 5, R DIFF = 54Ω, C L = CL2 = 00pF Driver Input to Output, t PHL (SP485EMN ONLY) 20 30 80 ns Driver Skew 5 0 ns see Figures 3 and 5, t SKEW = |tDPHL - tDPLH| Driver Rise or Fall Time 3 5 40 ns From 0%-90%; R DIFF = 54Ω C L = CL2 = 100pF; see Figures 3 and 6 Output Voltages Logic.........................-0.3V to (Vcc + 0.5V) Drivers.............................................+/-15V Receivers..................-0.3V to (Vcc + 0.5V) Storage Temperature.......................-65˚C to +150˚C Power Dissipation 8-pin NSOIC...................................................550mW (derate 6.60mW/ºC above +70ºC) 8-pin PDIP....................................................000mW (derate .8mW/ºC above +70ºC) |
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