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SP491E Datasheet(PDF) 5 Page - Exar Corporation |
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SP491E Datasheet(HTML) 5 Page - Exar Corporation |
5 / 12 page 5 Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (50)668-707 • www.exar.com SP490E,49E_0_05243 ABSOLUTEMAXIMUMRATINGS Thesearestressratingsonlyandfunctionaloperationofthedevice attheseratingsoranyotherabovethoseindicatedintheoperation 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 InputVoltages Logic.................................................-0.5Vto(V CC+0.5V) Drivers..............................................-0.5Vto(V CC+0.5V) Receivers................................................................±14V OutputVoltages Logic................................................-0.5Vto(V CC+0.5V) Drivers....................................................................±14V Receivers.........................................-0.5Vto(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 SP491EDRIVER DCCharacteristics 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 .5 V CC Volts With Load; R = 27Ω; (RS485); see figure 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, RE, DE Input Low Voltage 0.8 Volts Applies to D, RE, DE Input Current ±0 µA Applies to D, RE, DE Driver Short-Circuit Current V OUT = HIGH 250 mA -7V ≤ V O ≤ 12V V OUT = LOW 250 mA -7V ≤ V O ≤ 12V SP491EDRIVER ACCharacteristics Maximum Data Rate 0 Mbps RE = 5V, DE = 5V Driver Input to Output 30 60 ns t PLH; RDIFF = 54Ω, CL = CL2 = 00pF; see figures 3 and 5 Driver Input to Output 30 60 ns t PHL; RDIFF = 54Ω, CL = CL2 = 00pF; see figures 3 and 5 Driver Skew 5 0 ns see figures 3 and 5, t SKEW = | tDPLH - tDPHL | Driver Rise or Fall Time 5 40 ns From 0% to 90%; R DIFF = 54Ω, C L = CL2 = 00pF; see figures 3 and 5 Driver Enable to Output High 40 70 ns C L = CL2 = 00pF; see figures 4 and 6; S 2 closed Driver Enable to Output Low 40 70 ns C L = CL2 = 00pF; see figures 4 and 6; S closed Driver Disable Time from Low 40 70 ns C L = CL2 = 00pF; see figures 4 and 6; S closed Driver Disable Time from High 40 70 ns C L = CL2 = 00pF; see figures 4 and 6; S 2 closed ELECTRICALCHARACTERISTICS |
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