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TLS2205 датащи(PDF) 9 Page - Texas Instruments |
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TLS2205 датащи(HTML) 9 Page - Texas Instruments |
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9 / 31 page ![]() SLFS040 – DECEMBER 1993 POST OFFICE BOX 655303 DALLAS, TEXAS 75265 9 PRINCIPLES OF OPERATION _ + Voltage Reference VltICPORVref VCC Overtemperature _ + _ + RQ S _ + UV VCC R1 R2 VCC 45.6 k 20 k VCC (enable) = 4.1 V Comp1 Comp2 0.25 V RDY VCPOR 5 A Cpor VCC Fault PORN CPOR 1.21 V NOTE: Vlt = Low voltage threshold = 0.25 V VCPOR = Voltage across the power-on-reset capacitor ICPOR = Current supplied to the CPOR terminal 5 A Vref = Reference voltage = 1.21 V Area within the dotted line is internal to the device Cuv1 Figure 1. Voltage Monitor Circuit Time 1 Time 2 Time 3 Time 4 Time 5 AVCC CPOR PORN 5V 0V 5V 0V 5V 0V Band-Gap Voltage = 1.21 V Time VCC(trip) = 4.2 V TR = Reset Time Figure 2. Power-On Reset Timing Diagram |
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