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RT9811-23CB Datasheet(PDF) 1 Page - List of Unclassifed Manufacturers |
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RT9811-23CB Datasheet(HTML) 1 Page - List of Unclassifed Manufacturers |
1 / 6 page Preliminary RT9811 DS9811-00 June 2001 www.richtek-ic.com.tw 1 Micro-Power Voltage Detectors General Description The RT9811 is a micro-power voltage detector with de-glitched manual reset input 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 RT9811 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. To pull reset signal low manually, just pull the manual reset input (MR) below the specified VIL level. RT9811 is provided in SOT-25 package. Applications Computers Controllers Intelligent Instruments Critical µP and µC Power Monitoring Portable/Battery-Powered Equipment Ordering Information RT9811- 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 100nS Glitch Immunity of Manual Reset Input Low Functional Supply Voltage 0.9V Small 4-Pin SOT-25 Package Pin Configurations Part Number Pin Configurations RT9811- CB (SOT-25) TOP VIEW 1. GND 2. NC 3. RESET 4. MR 5. VDD Typical Application Circuit 54 3 2 1 Operating temperature range C: Commercial standard Package Type B : SOT-25 Reset Threshold 15 : 1.5V 16 : 1.6V : 49 : 4.9V 50 : 5.0V VDD µP RESET RT9811 VDD RESET MR GND |
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