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RT9819

Micro-Power Voltage Detectors

RT9819
New

The RT9819 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 3μA. The RT9819 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. The RT9819 is provided in SC-70-3, SC-82, SOT-23-3 and WDFN-6L 1.6x1.6 packages.

Applications

  • Computers
  • Controllers
  • Intelligent Instruments
  • Critical μP and μC Power Monitoring
  • Portable/Battery-Powered Equipment

Key Spec.

RT9819A RT9819B RT9819C RT9819D RT9819E RT9819F RT9819G
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 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;WDFN1.6x1.6-6;SC-70-3;SC-82 SOT-23;WDFN1.6x1.6-6;SC-70-3;SC-82 SOT-23;WDFN1.6x1.6-6;SC-70-3;SC-82 SOT-23;WDFN1.6x1.6-6;SC-70-3;SC-82 SOT-23;WDFN1.6x1.6-6;SC-70-3;SC-82 SOT-23;WDFN1.6x1.6-6;SC-70-3;SC-82 SOT-23;WDFN1.6x1.6-6;SC-70-3;SC-82

Features

  • Internally Fixed Threshold 1.2V to 5V in 0.1V Step

  • High Accuracy ±1.5%

  • Low Supply Current 3μA

  • No External Components Required

  • Quick Reset within 20μs

  • Built-in Recovery Delay Include 0ms, 55ms, 220ms, 450ms Options

  • Low Functional Supply Voltage 0.9V

  • CMOS Push-Pull Output

  • Small SC-70-3, SC-82, SOT-23-3 and WDFN-6L 1.6x1.6 Packages

  • RoHS Compliant and Halogen Free

Datasheet

DS9819-08.pdf

Datasheet

DS9819-08.pdf

RT9819B-26GV
Package Type:SOT-23
Sample Buy
RT9819C-29GV
Package Type:SOT-23
Sample Buy
RT9819C-30GV
Package Type:SOT-23
Sample Buy
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