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RT9809-49CV Datasheet(PDF) 1 Page - List of Unclassifed Manufacturers |
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RT9809-49CV Datasheet(HTML) 1 Page - List of Unclassifed Manufacturers |
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1 / 6 page  Preliminary RT9809 DS9809-00 June 2001 www.richtek-ic.com.tw 1 Micro-Power Voltage Detectors General Description The RT9809 is a micro-power voltage detector supervising the power supply voltage level for microprocessors ( µP) or digital systems. It provides internally fixed threshold levels with 0.1V per step ranging from 1.5V to 5V, which covers most digital applications. It features low supply current of 2.5 µA. The RT9809 performs supervisory function by sending out a reset signal whenever the VDD voltage falls below a preset threshold level. This reset signal will last the whole period before VDD recovering. Once VDD recovered up-crossing the threshold level, the reset signal will be released after a certain delay time. A 5% hysteresis splits the rising and falling threshold levels. RT9809 is provided in SOT-23 package. Applications Computers Controllers Intelligent Instruments Critical µP and µC Power Monitoring Portable/Battery-Powered Equipment Ordering Information RT9809- Features Internally Fixed Threshold 1.5V to 5V in 0.1V Step ±±±±2% Accuracy Low Supply Current 2.5 µµµµA No External Components Required Quick Reset within 20 µµµµS Built-in Recovery Delay 400mS Low Functional Supply Voltage 0.9V Small 3-Pin SOT-23 Package Pin Configurations Part Number Pin Configurations RT9809- CV (SOT-23) TOP VIEW 1. GND 2. RESET 3. VDD Typical Application Circuit 1 3 2 Operating temperature range C: Commercial standard Package Type V : SOT-23 Reset Threshold 15 : 1.5V 16 : 1.6V : 49 : 4.9V 50 : 5.0V VDD µP RESET RT9809 VDD RESET GND |
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