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RT9827 Datasheet(PDF) 1 Page - Richtek Technology Corporation |
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RT9827 Datasheet(HTML) 1 Page - Richtek Technology Corporation |
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1 / 14 page  RT9827 1 DS9827-01 April 2011 www.richtek.com Features Internally Fixed Threshold 1.2V to 5V in 0.1V Step High Accuracy ±±±±±1.5% Low Supply Current 3 μμμμμA No External Components Required Quick Reset within 20 μμμμμs Built-in Recovery Delay Include 0ms, 55ms, 220ms, 450ms Options Low Functional Supply Voltage 0.9V N-Channel Open-Drain Output Small SC-82, SC-70-3, SOT-23-3, SOT-23-5, SOT-89 Packages RoHS Compliant and 100% Lead (Pb)-Free Applications Computers Controllers Intelligent Instruments Critical μP and μC Power Monitoring Portable/Battery-Powered Equipment Micro-Power Voltage Detector General Description The RT9827 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 1.2V to 5V, which covers most digital applications. It features low supply current of 3 μA. The RT9827 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 upcrossing the threshold level, the reset signal will be released after a certain delay time. RT9827 is provided in SC-82, SC-70-3, SOT-23-3, SOT-23-5 and SOT-89 packages. Marking Information For marking information, contact our sales representative directly or through a Richtek distributor located in your area. Note : Richtek products are : RoHS compliant and compatible with the current require- ments of IPC/JEDEC J-STD-020. Suitable for use in SnPb or Pb-free soldering processes. Ordering Information GND RESET/ RESET VDD RT9827 RESET/ RESET VDD µP Pull Up 100k Typical Application Circuit RT9827 Package Type U3 : SC-70-3 V : SOT-23-3 VL : SOT-23-3 (L-Type) B : SOT-23-5 X : SOT-89 Y : SC-82 YR : SC-82 (R-Type) Lead Plating System P : Pb Free G : Green (Halogen Free and Pb Free) Threshold Voltage 12 : 1.2V 13 : 1.3V : 49 : 4.9V 50 : 5.0V - Reset Active Timeout Period A = 0ms (RESET) B = 55ms (RESET) C = 220ms (RESET) D = 450ms (RESET) E = 0ms (RESET) F = 55ms (RESET) G = 220ms (RESET) H = 450ms (RESET) |
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