RT9834 Datasheet, PDF (1/13 Pages) Richtek Technology Corporation – Micro-Power Voltage Detector with Manual Reset

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RT9834
Micro-Power Voltage Detector with Manual Reset
General Description
The RT9834 is a micro-power voltage detector with
deglitched manual reset input 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
RT9834 performs supervisory function by sending out a
reset signal whenever the V_DD voltage falls below a preset
threshold level. This reset signal will last the whole period
before V_DD recovering. Once V_DD recovered upcrossing
the threshold level, the reset signal will be released after
a certain delay time. To pull reset signal low manually,
just pull the manual reset input (MR) below the specified
V_IL level. The RT9834 is available in the SC-82 and
SOT-143 packages.
Marking Information
For marking information, contact our sales representative
directly or through a Richtek distributor located in your
area.
Features
z Internally Fixed Threshold 1.2V to 5V in 0.1V Step
z High Accuracy ±1.5%
z Low Supply Current 3μA
z No External Components Required
z Quick Reset within 20μs
z Built-in Recovery Delay : 0ms, 55ms, 220ms, 450ms
Options
z 800ns Glitch Immunity of Manual Reset Input
z Low Functional Supply Voltage 0.9V
z CMOS Push-Pull Output
z Small SC-82 and SOT-143 Packages
z RoHS Compliant and Halogen Free
Applications
z Computers
z Controllers
z Intelligent Instruments
z Critical μP and μC Power Monitoring
z Portable/Battery-Powered Equipment
Simplified Application Circuit
VDD
µp
RESET/
RESET
RT9834
VDD
MR
RESET/ _GND
RESET
Copyright ©2013 Richtek Technology Corporation. All rights reserved.
DS9834-00 May 2013
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
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