RT9807 RICHTEK [Richtek Technology Corporation], RT9807 Datasheet
RT9807
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RT9807 Summary of contents
Page 1
... It features low supply current of 3μA. The RT9807 performs supervisory function by sending out a reset signal whenever the VDD voltage falls below a preset threshold level. The timeout period of this reset signal can be adjusted via an external capacitor. Once VDD recovers above the threshold level, the reset signal will be released after a certain delay time ...
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... RT9807 Functional Pin Description Pin No. Pin Name RST 1 Reset Output Pin. (Open drain) 2 Ground Pin. GND MR 3 Manual Reset Pin. 4 Connect an external capacitor for setting reset timeout period Supply Voltage Input Pin. VDD Function Block Diagram VDD Absolute Maximum Ratings ...
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... R. Where R is the pull-up resistor and Min Typ 0 1.2 -- −1 100 -- 100 = 3.5mA -- -- 0. 0.25V -- 3.35 4.375 -- 0.275 -- 240 -- 0. the current flowing through r RT9807 Max Unit 5.5 V μA 5 3 ppm/°C μ μ kΩ 5. www.richtek.com 3 ...
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... RT9807 Typical Operating Characteristics Supply Current vs. Input Voltage 25° 0.5 1 1.5 2 2.5 Input Voltage (V) Reset Delay Time vs Capacitance 10000 1000 100 10 1 0.1 0.001 0.01 0.1 Capacitance (nF) Detector Threshold vs. Temperature 1.7 1.65 1.6 1.55 1.5 1. 1.4 -50 - Temperature (°C) www.richtek.com 125° 85°C ...
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... Application Information The RT9807 provides adjustable reset delay time to fit the need of a variety of μP applications. The reset delay time of the RT9807 can be adjusted by connecting a capacitor between the CT pin and GND. The CT capacitor must fit the need of low-leakage (<10nA), and it is recommended to use a ceramic capacitor such as X7R or NPO type ...
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... RT9807 Interfacing to Other Voltages The RT9807 is an open-drain voltage detector that can provide different voltage level of reset signals for processor application. As shown in Figure 4, the open-drain output can be connected to another voltage level less than 5.5V. This allows for easy logic compatibility to various microprocessors. ...
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... SOT-23-5 Surface Mount Package Richtek Technology Corporation Taipei Office (Marketing) 5F, No. 95, Minchiuan Road, Hsintien City Taipei County, Taiwan, R.O.C. Tel: (8862)86672399 Fax: (8862)86672377 Email: marketing@richtek.com RT9807 H L Dimensions In Inches Min Max 0.035 0.051 0.000 0.006 0.055 0.071 ...