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LMS485EINA датащи(PDF) 5 Page - National Semiconductor (TI) |
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LMS485EINA датащи(HTML) 5 Page - National Semiconductor (TI) |
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5 / 13 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 OL CMOS Low-level Output Voltage I OL = −4 mA, VID = 200 mV 0.4 V I OZR Tristate Output Leakage Current 0.4V ≤ V O ≤ + 2.4V ±1µA R IN Input Resistance − 7V ≤V CM ≤ +12V 12 k Ω Power Supply Current I CC Supply Current DE = V CC, RE = GND or VCC 400 800 µA DE = 0V, RE = GND or V CC 360 560 I OSD1 Driver Short-circuit Output Current V O = high, −7V ≤ V CM ≤ +12V 250 mA I OSD2 Driver Short-circuit Output Current V O = low, − 7V ≤V CM ≤ +12V 250 mA I OSR Receiver Short-circuit Output Current 0V ≤ V O ≤ V CC 95 mA Switching Characteristics Driver T PLH, T PHL Propagation Delay Input to Output R L =54 Ω,C L = 100 pF 10 40 80 ns T SKEW Driver Output Skew R L =54 Ω,C L = 100 pF 5 10 ns T R, T F Driver Rise and Fall Time R L =54 Ω,C L = 100 pF 3 10 40 ns T ZH, T ZL Driver Enable to Ouput Valid Time C L = 100 pF 25 70 ns T HZ, T LZ Driver Output Disable Time C L =15pF 35 70 ns Receiver T PLH, T PHL Propagation Delay Input to Output R L =54 Ω,C L = 100 pF 20 90 200 ns T SKEW Receiver Output Skew R L =54 Ω,C L = 100 pF 5 ns T ZH, T ZL Receiver Enable Time C L =15 pF 20 50 ns T HZ, T LZ Receiver Disable Time C L =15 pF 20 50 ns F MAX Maximum Data Rate 2.5 Mbps 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 the 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, TA,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, 100 pF discharged through 1.5 k 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: Peak current www.national.com 5 |
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