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S-1000 Datasheet(PDF) 21 Page - Seiko Instruments Inc |
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S-1000 Datasheet(HTML) 21 Page - Seiko Instruments Inc |
21 / 38 page ULTRA-SMALL PACKAGE HIGH-PRECISION VOLTAGE DETECTOR Rev.2.3_00 S-1000 Series Seiko Instruments Inc. 21 OUT VSS VDD S-1000 Series V R *1 100 k Ω COUT VDD V *1. R is unnecessary for CMOS output products. Figure 23 Measurement circuit for response time VIH Output voltage Input voltagae VIL VDD tPHL tPLH VIH = 5.5 V, VIL = 0.95 V 1 µs 1 µs VDD × 10% VDD × 90% Figure 22 Measurement condition for response time Caution The above connection diagram and constants do not guarantee correct operation. Perform sufficient evaluation using the actual application to set the constants. Application Circuit Examples 1. Microcomputer reset circuits If the power supply voltage to a microcomputer falls below the specified level, an unspecified operation may be performed or the contents of the memory register may be lost. When power supply voltage returns to normal, the microcomputer needs to be initialized before normal operations can be done. Reset circuits protect microcomputers in the event of current being momentarily switched off or lowered. Reset circuits shown in Figures 24, 25 can be easily constructed with the help of the S-1000 series, that has low operating voltage, a high-precision detection voltage and hysteresis. VSS VDD Microcomputer S-1000C VSS (Only for Nch open-drain products) VDD1 VDD2 Microcomputer S-1000N Figure 24 Reset circuit example(S-1000C) Figure 25 Reset circuit example (S-1000N) Caution The above connection diagram and constants do not guarantee correct operation. Perform sufficient evaluation using the actual application to set the constants. |
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