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LMS1485MX Datasheet(PDF) 4 Page - National Semiconductor (TI) |
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LMS1485MX Datasheet(HTML) 4 Page - National Semiconductor (TI) |
4 / 10 page Electrical Characteristics (Continued) Over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted) Symbol Parameter Conditions Min Typ Max Units V OH CMOS High-Level Output Voltage I OH = −4mA 4 V I OSR Short-Circuit Output Current V O = GND or VCC 785 mA I OZ Tristate Output Leakage Current 0.4V ≤V O ≤+2.4V −1 1 µA Power Supply Current I CC Supply Current Driver Enabled, Output = No Load, Digital Inputs = GND or V CC 1.1 2.2 mA Driver Disabled, Output = No Load, Digital Inputs = GND or V CC 1 2.2 mA Switching Characteristics Driver T PLH, T PHL Propagation Delay Input to Output R L =54 Ω,C L = 100pF (Figure 3, Figure 7) 11 20 ns T SKEW Driver Output Skew R L =54 Ω,C L = 100pF (Figure 3, Figure 7) 1ns T R, T F Driver Rise and Fall Time R L = 100 Ω,C L = 100pF (Figure 3, Figure 7) 510 ns T ENABLE Driver Enable to Ouput Valid Time (Figure 4, Figure 8)18 32 ns T DISABLE Output Disable Time (Figure 4, Figure 8)20 40 ns Receiver T PLH, T PHL Propagation Delay Input to Output C L = 15pF (Figure 5, Figure 7) 18 33 55 ns T SKEW Receiver Output Skew (Figure 5, Figure 7)2 ns T ENABLE Receiver Enable Time (Figure 6, Figure 10) 6 25 ns T DISABLE Receiver Disable Time (Figure 6, Figure 10)15 25 ns Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is intended to be functional, but specific performance is not guaranteed. For guaranteed specifications and the test conditions, see the Electrical Characteristics Note 2: All voltage values, except differential I/O bus voltage, are with respect to network ground terminal. Note 3: The maximum power dissipation is a function of TJ(MAX), θJA, and TA. The maximum allowable power dissipation at any ambient temperature is PD = (TJ(MAX) -TA)/θJA. All numbers apply for packages soldered directly into a PC board. Note 4: ESD rating based upon human body model, 100pF discharged through 1.5k Ω. Note 5: Voltage limits apply to DI, DE, RE pins. Note 6: Differential input/output bus voltage is measured at the non-inverting terminal A with respect to the inverting terminal B. Note 7: | ∆VOD| and |∆VOC| are changes in magnitude of VOD and VOC, respectively when the input changes from high to low levels. Note 8: ESD rating applies to pins 6 and 7 Note 9: ESD rating applies to pins 1, 2, 3, 4, 5 and 8 www.national.com 4 |
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