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SP490 Datasheet(PDF) 5 Page - Sipex Corporation |
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SP490 Datasheet(HTML) 5 Page - Sipex Corporation |
5 / 12 page 5 Date: 02/24/05 SP490/491 Full Duplex RS-485 Transceivers © Copyright 2005 Sipex Corporation 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...................................................-0.5V to (V CC+0.5V) Drivers................................................-0.5V to (V CC+0.5V) Receivers..................................................................±14V Output Voltages Logic...................................................-0.5V to (V CC+0.5V) Drivers......................................................................±14V Receivers...........................................-0.5V to (V CC+0.5V) Storage Temperature......................................................-65˚C to +150 Power Dissipation.....................................................................1000mW T MIN to TMAX and VCC = 5V ± 5% unless otherwise noted. PARAMETERS MIN. TYP. MAX. UNITS CONDITIONS SP491 DRIVER DC Characteristics Differential Output Voltage GND V CC Volts Unloaded; R = ∞ ; see figure 1 Differential Output Voltage 2 V CC Volts With Load; R = 50Ω; (RS422); see figure 1 Differential Output Voltage 1.5 V CC Volts With Load; R = 27Ω; (RS485); 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 D, REB, DE Input Low Voltage 0.8 Volts Applies to D, REB, DE Input Current ±10 µA Applies to D, REB, DE Driver Short-Circuit Current V OUT = HIGH 35 250 mA -7V ≤ V O ≤ 12V V OUT = LOW 35 250 mA -7V ≤ V O ≤ 12V SP491 DRIVER AC Characteristics Maximum Data Rate 5 Mbps REB = 5V, DE = 5V Driver Input to Output 20 30 60 ns t PLH; RDIFF = 54Ω, CL1 = CL2 = 100pF; see figures 3 and 6 Driver Input to Output 20 30 60 ns t PHL; RDIFF = 54Ω, CL1 = CL2 = 100pF; see figures 3 and 6 Driver Skew 5 10 ns see figures 3 and 6, t SKEW = | tDPLH - tDPHL | Driver Rise or Fall Time 3 15 40 ns From 10% to 90%; R DIFF = 54Ω, C L1 = CL2 = 100pF; see figures 3 and 6 Driver Enable to Output High 40 70 ns C L1 = CL2 = 100pF; see figures 4 and 7; S 2 closed Driver Enable to Output Low 40 70 ns C L1 = CL2 = 100pF; see figures 4 and 7; S 1 closed Driver Disable Time from Low 40 70 ns C L1 = CL2 = 100pF; see figures 4 and 7; S 1 closed Driver Disable Time from High 40 70 ns C L1 = CL2 = 100pF; see figures 4 and 7; S 2 closed ELECTRICAL CHARACTERISTICS |
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