ELECTRICAL CHARACTERISTICS T to T and V = 5V +/-5% unless otherwise noted. MIN MAX CC PARAMETERSMIN.TYP.MAX.UNITS CONDITIONSSP485 DRIVER (continued) AC Characteristics Driver Enable to Output High 40 70 ns C = 100pF, see figures 4 and 6, L S closed 2 Driver Enable to Output Low 40 70 ns C = 100pF, see figures 4 and 6, L S closed 1 Driver Disable Time from High 40 70 ns C = 15pF, see figures 2 and 8, L S closed 2 Driver Disable Time from Low 40 70 ns C = 15pF, see figures 2 and 8, L S closed 1 SP483/SP485 RECEIVER DC Characteristics Differential Input Threshold -0.2 +0.2 Volts -7V ≤ V ≤ +12V CM Input Hysteresis 10 mV V = 0V CM Output Voltage High 2.4 5 Volts I = -4mA, V = +200mV O ID Output Voltage Low 0.0 0.4 Volts I = +4mA, V = -200mV O ID Three-State ( High Impedance) +/-1 µA 0.4V ≤ V ≤ 2.4V; RE = 5V O Output Current Input Resistance 12 15 kΩ -7V ≤ V ≤ +12V CM Input Current (A, B); V = 12V +1.0 mA DE = 0V, V = 0V or 5.25V, IN CC V = 12V IN Input Current (A, B); V = -7V -0.8 mA DE = 0V, V = 0V or 5.25V, IN CC V = -7V IN SP485 RECEIVERAC Characteristics Maximum Data Rate 5 Mbps RE = 0V, DE = 0V Receiver Input to Output 20 45 200 ns t Figures 3 and 7, PLH ; R = 54Ω, C = C = 100pF DIFF L1 L2 Receiver Input to Output 20 45 200 ns t Figures 3 and 7, PHL ; R = 54Ω, C = C = 100pF DIFF L1 L2 Differential Receiver Skew 13 ns R = 54Ω, C = C = 100pF, DIFF L1 L2 |t - t | Figures 3 and 7 PHL PLH Receiver Enable to Output Low 45 70 ns C = 15pF, Figures 2 and 8; RL S Closed 1 Receiver Enable to Output High 45 70 ns C = 15pF, Figures 2 and 8; RL S Closed 2 Receiver Disable from LOW 45 70 ns C = 15pF, Figures 2 and 8; RL S Closed 1 Receiver Disable from High 45 70 ns C = 15pF, Figures 2 and 8; RL S Closed 2 236DSR00 3 Rev. 1.0.3
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