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SP481ECN-L Datasheet(PDF) 6 Page - Exar Corporation |
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SP481ECN-L Datasheet(HTML) 6 Page - Exar Corporation |
6 / 12 page 6 Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 50-668-707 • www.exar.com SP48E,485E_00_2808 Figure 6. Driver Enable and Disable Times Figure 8. Receiver Enable and Disable Times +3V 0V DE 5V VOL A,B 0V 1.5V 1.5V tZL tZH f = 1MHz; tR < 10ns; tF < 10ns VOH A,B 2.3V 2.3V tLZ tHZ 0.5V 0.5V Output normally LOW Output normally HIGH SWITCHING WAVEFORMS FUNCTION TRUTH TABLES INPUTS OUTPUTS RE DE DI LINE CONDITION A B X No Fault 0 X 0 No Fault 0 X 0 X X Z Z X X Fault Z Z Table 1. Transmit Function Truth Table INPUTS OUTPUTS RE DE A - B R 0 0 +0.2V 0 0 -0.2V 0 0 0 Inputs Open 0 X Z Table 2. Receive Function Truth Table VOH VOL R 1.5V 1.5V tPHL f = 1MHz; tR 10ns; tF ≤ 10ns OUTPUT VOD2+ VOD2– A – B 0V 0V tPLH INPUT ≤ +3V 0V 5V 0V 1.5V 1.5V tZL tZH f = 1MHz; tR ≤ 10ns; tF ≤ 10ns R 1.5V 1.5V tLZ tHZ 0.5V 0.5V Output normally LOW Output normally HIGH VIL VIH R RE Figure 7. Receiver Propagation Delays |
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