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The RT9818 is a micro-power voltage detector designed to supervise the power supply voltage levels for microprocessors (μP) or digital systems. It provides internally fixed threshold levels with 0.1V increments, ranging from 1.2V to 5V, covering most digital applications. The device features a low supply current of 3μA. The RT9818 performs supervisory function by sending out a reset signal whenever the VDD voltage falls below a preset threshold level. This reset signal persists until VDD recovers and surpasses the threshold level, at which point the reset signal is released after a certain delay time. The RT9818 is available in SC-82, SC-70-3, SOT-23-3, SOT-23-5, and SOT-89 packages. The recommended junction temperature range is -40°C to 125°C, and the ambient temperature range is -40°C to 85°C.

应用

  • Desktop/Notebook Computers
  • Critical μP and μC Power Monitoring
  • Portable/Battery-Powered Equipment
  • Controllers
主要规格
RT9818A RT9818B RT9818C RT9818D RT9818E RT9818F RT9818G
Status Active Active Active Active Active Active Active
Vin (min) (V) 0.9 0.9 0.9 0.9 0.9 0.9 0.9
Vin (max) (V) 6 6 6 6 6 6 6
VTH (min) (V) 1.2 1.2 1.2 1.2 1.2 1.2 1.2
VTH (max) (V) 5 5 5 5 5 5 5
Accuracy (±%) 1.5 1.5 1.5 1.5 1.5 1.5 1.5
Reset Active Type Low(Open Drain) Low Low Low High High High
Reset Time-out Period (typ) (ms) 0 55 220 450 0 55 220
Reset Delay Time (typ) (ms) 0.02 0.02 0.02 0.02 0.02 0.02 0.02
Package Type SOT-23;SOT-25;SC-70-3;SC-82;SOT-89 SOT-23;SOT-25;SC-70-3;SC-82;SOT-89 SOT-23;SOT-25;SC-70-3;SC-82;SOT-89 SOT-23;SOT-25;SC-70-3;SC-82;SOT-89 SOT-23;SOT-25;SC-70-3;SC-82;SOT-89 SOT-23;SOT-25;SC-70-3;SC-82;SOT-89 SOT-23;SOT-25;SC-70-3;SC-82;SOT-89
Outline Dimension, Footprint, Drawing Download Download Download Download Download Download Download
关键特性
  • Internally Fixed Threshold from 1.2V to 5V in 0.1V Step
  • ±1.5% High Accuracy
  • 3μA Low Supply Current
  • No External Components Required
  • Quick Reset within 20μs
  • Built-In Recovery Delay Options: 0ms, 55ms, 220ms, 450ms
  • 0.9V Low Functional Supply Voltage
  • N-Channel Open-Drain Output
  • Available in Small SC-82, SC-70-3, SOT-23-3, SOT-23-5, and SOT-89 Packages
Datasheet
TitleVersionLast UpdateDownload
RT9818: Micro-Power Voltage DetectorV12.02024/11/13
Technical Documents
TitleItem TypeLast UpdateDownload
Power Management for Video Doorbell App. Note2021/10/08
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