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DS1231/S Scheda tecnica(PDF) 6 Page - Maxim Integrated Products |
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DS1231/S Scheda tecnica(HTML) 6 Page - Maxim Integrated Products |
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6 / 9 page ![]() DS1231/S 022698 6/9 APPLICATION WITH MODE PIN GROUNDED Figure 6 IN MODE TOL GND VCC NMI RST RST TO µ P DS1231 +5VDC VOLTAGE SENSE POINT EXAMPLE: CTR = 0.2 IC = 30 µA IF = 150 µA VOLTAGE SENSE POINT = 105 AND VZ = 100 VOLTS IC R1 IF -5% VCC THRESHOLD VOLTAGE SENSE POINT (TRIP VALUE) + VZ ) IC CTR XR1 CTR + IC IF CTR + CURRENT TRANSFER RATIO VZ + ZENNER VOLTAGE THEN 105 + 100 ) 30 0.2 xR1 R1 + 33K NOTE: RST requires a pull–up resister. AC VOLTAGE MONITOR WITH OPTO-ISOLATION Figure 7 IN MODE TOL GND VCC NMI RST RST -5% VCC THRESHOLD TO µ P DS1231 +5VDC AC LINE INPUT NOTE: RST requires a pull–up resister. |
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