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ISL41387IRZ 데이터시트(PDF) 11 Page - Intersil Corporation |
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ISL41387IRZ 데이터시트(HTML) 11 Page - Intersil Corporation |
11 / 27 page ISL81387, ISL41387 11 FN6201.4 June 9, 2014 Submit Document Feedback Test Circuits and Waveforms FIGURE 1. RS-485 DRIVER VOD AND VOC TEST CIRCUIT FIGURE 2A. TEST CIRCUIT FIGURE 2B. MEASUREMENT POINTS FIGURE 2. RS-485 DRIVER PROPAGATION DELAY AND DIFFERENTIAL TRANSITION TIMES FIGURE 3A. TEST CIRCUIT FIGURE 3B. MEASUREMENT POINTS FIGURE 3. RS-485 DRIVER ENABLE AND DISABLE TIMES D DEN DY VCC VOD VOC R R Y Z RD VCM + - D DEN DY VCC SIGNAL GENERATOR CL = 100pF RDIFF Y Z CL = 100pF OUT (Z) 3V 0V tPLH 1.5V 1.5V VOH VOL 50% 50% tPHL OUT (Y) tPHL VOH VOL 50% 50% tPLH DIFF OUT (Z - Y) tR +VOD -VOD 90% 90% tF 10% 10% DY SKEW = |tPLH (Y OR Z) - tPHL (Z OR Y)| 0V 0V tDHL tDLH D DEN DY CL 500 Y Z VCC GND SW SIGNAL GENERATOR FOR SHDN TESTS, SWITCH ON AND DEN L- H SIMULTANEOUSLY PARAMETER OUTPUT RXEN DY SW CL (pF) tHZ Y/Z X 0/1 GND 15 tLZ Y/Z X 1/0 VCC 15 tZH Y/Z X 0/1 GND 100 tZL Y/Z X 1/0 VCC 100 tZH(SHDN) Y/Z 0 0/1 GND 100 tZL(SHDN) Y/Z 0 1/0 VCC 100 OUT (Y, Z) 3V 0V 1.5V 1.5V VOH 0V 2.3V VOH - 0.5V tHZ OUT (Y, Z) VCC VOL 2.3V VOL + 0.5V tLZ DEN OUTPUT HIGH OUTPUT LOW tZL tZH tZH(SHDN) tZL(SHDN) ENABLED |
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