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TL7770-12CDWRE4 Datasheet(PDF) 8 Page - Texas Instruments |
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TL7770-12CDWRE4 Datasheet(HTML) 8 Page - Texas Instruments |
8 / 15 page TL7770-5, TL7770-12 DUAL POWER-SUPPLY SUPERVISORS SLVS019F – OCTOBER 1987 – REVISED JULY 1999 8 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 APPLICATION INFORMATION VS 10 k Ω 1VSU 1RESIN GND 1RESET 1RESET VCC 1CT To System Reset 10 k Ω RT (see Note B) CT System Supply Reset Input (from system) To System Reset 5 1 4 3 2 8 16 NOTE B: When VCC and 1VSU are connected to the same point, it is recommended that series resistance (RT) be added between thetime-delay programming capacitor (CT) and the voltage-supervisor device terminal (1CT). The suggested RT value is given by: R T u V I * VIT * 1 10*3 , where V I + the lesser of 7.1 V or VS When this series resistor is used, the td calculation is as follows: t d + 1.3 * (6.5E * 5) 10*5 R T 6.5 10*5 C T Figure 4. System Reset Controller With Undervoltage Sensing |
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