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RT9801 Datasheet(PDF) 1 Page - Richtek Technology Corporation |
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RT9801 Datasheet(HTML) 1 Page - Richtek Technology Corporation |
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1 / 6 page  Preliminary RT9801 DS9801-00 January 2002 www.richtek-ic.com.tw 1 User Programmable Micro-Power Voltage Detectors General Description The RT9801 is a micro-power voltage detector supervising the power supply voltage level for microprocessors ( µP) or digital systems. It provides user programmable threshold levels with 0.1V step ranging from 1.5V to 5V, which covers most digital applications. It features low supply current of 3 µA. Selection of VTH is easily achieved through 3 pins connected to GND, VDD or floating for different threshold voltage settings. Two versions of threshold voltages, 1.5V ~ 4V and 2.5V ~ 5V, which are programmed in factory are offered by customer demands. The RT9801 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. Reset signal will release after VDD is recovered and lasts for the whole period of Reset Active Time-out period. RT9801 is N-channel, open-drain output and provided in SOT-26 package. Ordering Information RT9801 Features User Programmable Threshold 1.5V to 5V in 0.1V Step with ±±±±3% Accuracy Low Supply Current 3 µµµµA Quick Reset within 20 µµµµS Built-in Recovery Delay 200mS Low Functional Supply Voltage 0.9V Small SOT-26 Package Applications Computers Controllers Intelligent Instruments Critical µP and µC Power Monitoring Portable/Battery-Powered Equipment Pin Configurations Part Number Pin Configurations RT9801 CE (Plastic SOT-26) TOP VIEW 1. VSET0 2. GND 3. RESET 4. VDD 5. VSET2 6. VSET1 Typical Application Circuit Operating temperature range C: Commercial standard Package Type E : SOT-26 Reset Threshold A : 2.5V~5V B : 1.5V~4V VSET0 GND RESET VSET1 VSET2 VDD GND RESET VDD Pull Up RT9801B VTH = 2.5V in this example µP RT9801 64 3 2 1 5 |
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Similar Description - RT9801 |
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