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RT9808-41CX Datasheet(PDF) 1 Page - List of Unclassifed Manufacturers |
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1 / 12 page Preliminary RT9808 DS9808-01 January 2002 www.richtek-ic.com.tw 1 Micro-Power Voltage Detectors General Description The RT9808 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 3 µA. The RT9808 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 if VDD is above threshold and last for the whole period of reset active time out. RT9808 is n-channel, open-drain output. Applications Computers Controllers Intelligent Instruments Critical µP and µC Power Monitoring Portable/Battery-Powered Equipment Ordering Information RT9808- Features Internally Fixed Threshold 1.5V to 5V in 0.1V Step ±±±±2% Accuracy Low Supply Current 3 µµµµA Quick Reset within 20 µµµµS Built-in Recovery Delay 200mS Low Functional Supply Voltage 0.9V N-Channel Open Drain Output Small 3-Pin SOT-23/SOT89 and 5-Pin SOT-25 Packages Pin Configurations Part Number Pin Configurations RT9808- CV (Plastic SOT-23) TOP VIEW 1. RESET 2. GND 3. VDD RT9808- CX (Plastic SOT-89) TOP VIEW 1. RESET 2. VDD 3. GND RT9808- CB (Plastic SOT-25) TOP VIEW 1. RESET 2. VDD 3. GND 4. NC 5. NC Typical Application Circuit Operating temperature range C: Commercial standard Package Type V : SOT-23 X : SOT-89 B : SOT-25 Reset Threshold 15 : 1.5V 16 : 1.6V : 49 : 4.9V 50 : 5.0V 1 3 2 12 3 54 3 2 1 VDD µP RESET RT9808 VDD RESET GND Pull Up 100K |
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