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MAX3490C/D датащи(PDF) 10 Page - Maxim Integrated Products |
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MAX3490C/D датащи(HTML) 10 Page - Maxim Integrated Products |
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10 / 16 page ![]() 3.3V-Powered, 10Mbps and Slew-Rate-Limited True RS-485/RS-422 Transceivers 10 ______________________________________________________________________________________ VID 50 Ω CL = 15pF (NOTE 5) GENERATOR (NOTE 4) R OUT tRPLH 1.5V OUT 1.5V 0V IN 1.5V 3.0V 0V tRPHL VCC VOM VOM 0V VCC 2 VOM = 3V 0V VCC VOL CL (NOTE 5) R 1.5V -1.5V 50 Ω GENERATOR (NOTE 4) VCC VID 1.5V OUT S1 S2 1k IN 1.5V S1 CLOSED S2 OPEN S3 = -1.5V tPRZL tPRSL 3V 0V VOH 0V 1.5V OUT IN 1.5V S1 OPEN S2 CLOSED S3 = 1.5V tPRZH tPRSH 3V 0V VCC VOL 0.25V OUT IN 1.5V S1 CLOSED S2 OPEN S3 = -1.5V tPRLZ 3V 0V VOH 0V 0.25V 1.5V OUT IN S1 OPEN S2 CLOSED S3 = 1.5V tPRHZ S3 Figure 11. Receiver Propagation Delay Figure 12. Receiver Enable and Disable Times Note 4: The input pulse is supplied by a generator with the following characteristics: PRR = 250kHz, 50% duty cycle, tr ≤ 6.0ns, ZO = 50Ω. Note 5: CL includes probe and stray capacitance. |
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