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SP485CS Datasheet(PDF) 2 Page - Sipex Corporation |
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SP485CS Datasheet(HTML) 2 Page - Sipex Corporation |
2 / 10 page 2 Rev. 07/16/02 SP481/483/485 Low Power Half-Duplex RS485 Transceivers © Copyright 2002 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............................................................................................................±12V Input Voltages Logic........................................................-0.3V to (V CC+0.5V) Drivers..................................................-0.3V to (V CC+0.5V) Receivers................................................................. ±15V Output Voltages Logic........................................................-0.3V to (V CC+0.5V) Drivers...................................................................... ±15V Receivers............................................-0.3V to (V CC+0.5V) Storage Temperature.......................................................-65˚C to +150˚C Power Dissipation...........................................................................500mW SPECIFICATIONS T MIN to TMAX and VCC = 5V ± 5% unless otherwise noted. PARAMETERS MIN. TYP. MAX. UNITS CONDITIONS SP481/SP483/SP485 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 DE, DI, RE Input Low Voltage 0.8 Volts Applies to DE, DI, RE Input Current ±10 µA Applies to DE, DI, RE Driver Short-Circuit Current V OUT = HIGH 35 250 mA -7V ≤ V O ≤ +12V V OUT = LOW 35 250 mA -7V ≤ V O ≤ +12V SP481/SP485 DRIVER AC Characteristics Maximum Data Rate 5 Mbps RE = 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 L = 100pF; see figures 4 & 7; S2 closed Driver Enable to Output Low 40 70 ns C L = 100pF; see figures 4 & 7; S1 closed Driver Disable Time from Low 40 70 ns C L = 15pF; see figures 2 & 9; S1 closed Driver Disable Time from High 40 70 ns C L = 15pF; see figures 2 & 9; S2 closed SP481/SP483/SP485 RECEIVER DC Characteristics Differential Input Threshold -0.2 +0.2 Volts -7V ≤ V CM ≤ +12V Input Hysteresis 10 mV V CM = 0V Output Voltage High 3.5 Volts I O = -4mA, VID = +200mV Output Voltage Low 0.4 Volts I O = +4mA, VID = -200mV Three-State (High Impedance) Output Current ±1 µA 0.4V ≤ V O ≤ 2.4V; RE = 5V Input Resistance 12 15 kΩ -7V ≤ V CM ≤ +12V Input Current (A, B); V IN = 12V +1.0 mA DE = 0V, V CC = 0V or 5.25V, VIN = 12V Input Current (A, B); V IN = -7V -0.8 mA DE = 0V, V CC = 0V or 5.25V, VIN = -7V Short-Circuit Current 7 95 mA 0V ≤ V CM ≤ VCC |
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