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MAX1490BEPG Datasheet(PDF) 3 Page - Maxim Integrated Products |
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MAX1490BEPG Datasheet(HTML) 3 Page - Maxim Integrated Products |
3 / 21 page Complete, Isolated RS-485/RS-422 Data Interface _______________________________________________________________________________________ 3 PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS R = 50 Ω (RS-422) 2 Differential Driver Output (With Load) VOD2 R = 27 Ω (RS-485), Figure 4 1.5 5.0 V Differential 0.3 Change in Magnitude of Differential Output Voltage for Complementary Output States ∆VOD R = 27 Ω or 50Ω, Figure 4 Common mode 0.3 V Driver Common-Mode Output Voltage VOC R = 27 Ω or 50Ω, Figure 4 4 V MAX1490A/B 0.25 VIN = 12V MAX1480A/B/C 1 MAX1490A/B 0.2 Input Current (A, B) ISO IIN DE´ = 0V, VCC_ = 0V or 5.5V VIN = -7V MAX1480A/B/C 0.8 mA Receiver Input Resistance RIN -7V ≤ VCM ≤ 12V 12 k Ω Receiver Differential Threshold Voltage VTH -7V ≤ VCM ≤ 12V -0.2 +0.2 V Receiver Input Hysteresis ∆VTH VCM = 0V 70 mV Receiver Output/Receiver Output Low Voltage VOL Using resistor values listed in Tables 1 and 2 0.4 V Receiver Output/Receiver Output High Current IOH VOUT = 5.5V 250 µA Driver Short-Circuit Current ISO IOSD -7V ≤ VO ≤ 12V (Note 4) 100 mA ELECTRICAL CHARACTERISTICS (continued) (VCC_ = 5V ±10%, VFS = VCC_, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC_ = 5V and TA = +25°C.) (Notes 1, 2) SWITCHING CHARACTERISTICS—MAX1480A/MAX1490A (VCC_ = 5V ±10%, FS = VCC_, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC_ = 5V and TA = +25°C.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS tPLH 100 275 Driver Input to Output Propagation Delay tPHL Figures 5 and 7, RDIFF = 54Ω, CL1 = CL2 = 100pF 100 275 ns Driver Output Skew tSKEW Figures 5 and 7, RDIFF = 54Ω, CL1 = CL2 = 100pF 25 90 ns Driver Rise or Fall Time tR, tF Figures 5 and 7, RDIFF = 54Ω, CL1 = CL2 = 100pF 15 40 ns Driver Enable to Output High (MAX1480A Only) tZH Figures 6 and 8, CL = 100pF, S2 closed 0.2 1.5 µs Driver Enable to Output Low (MAX1480A Only) tZL Figures 6 and 8, CL = 100pF, S1 closed 0.2 1.5 µs Driver Disable Time from Low (MAX1480A Only) tLZ Figures 6 and 8, CL = 15pF, S1 closed 0.2 1.5 µs Driver Disable Time from High (MAX1480A Only) tHZ Figures 6 and 8, CL = 15pF, S2 closed 0.2 1.5 µs tPLH 100 225 Receiver Input to Output Propagation Delay tPHL Figures 5 and 10, RDIFF = 54Ω, CL1 = CL2 = 100pF 100 225 ns |
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