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MAX1480 Datasheet(PDF) 5 Page - Maxim Integrated Products |
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MAX1480 Datasheet(HTML) 5 Page - Maxim Integrated Products |
5 / 21 page Complete, Isolated RS-485/RS-422 Data Interface _______________________________________________________________________________________ 5 Note 1: All currents into device pins are positive; all currents out of device pins are negative. All voltages are referenced to logic- side ground (GND_), unless otherwise specified. Note 2: For DE´ and DI´ pin descriptions, see Detailed Block Diagram and Typical Application Circuit (Figure 1 for MAX1480A/ MAX1480B/MAX1480C, Figure 2 for MAX1490A/MAX1490B). Note 3: Shutdown supply current is the current at VCC1 and VCC2 when shutdown is enabled. Note 4: Applies to peak current (see Typical Operating Characteristics). Although the MAX1480A/B/C and MAX1490A/B provide electrical isolation between logic ground and signal paths, they do not provide isolation between external shields and the signal paths (see Isolated Common Connection section). SWITCHING CHARACTERISTICS—MAX1480B/MAX1480C/MAX1490B (continued) (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 Driver Disable Time from Low (MAX1480C Only) tLZ Figures 6 and 8, CL = 15pF, S1 closed 2.0 4.5 µs Driver Disable Time from High (MAX1480C Only) tHZ Figures 6 and 8, CL = 15pF, S2 closed 2.0 4.5 µs tPLH 2 3.0 Receiver Input to Output Propagation Delay tPHL Figures 5 and 10, RDIFF = 54Ω, CL1 = CL2 = 100pF 2 3.0 µs |tPLH - tPHL| Differential Receiver Skew tSKD Figures 5 and 10, RDIFF = 54Ω, CL1 = CL2 = 100pF 1200 ns Maximum Data Rate fMAX tPLH, tPHL < 50% of data period 0.25 Mbps Time to Shutdown tSHDN 100 µs Shutdown to Driver Output High tZH(SHDN) Figures 6 and 9, CL = 100pF, S2 closed 35 100 µs Shutdown to Driver Output Low tZL(SHDN) Figures 6 and 9, CL = 100pF, S1 closed 35 100 µs |
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