RT9833 Datasheet, PDF (1/11 Pages) Richtek Technology Corporation – Micro-Power Voltage Detectors

®
RT9833
Micro-Power Voltage Detectors with Manual Reset
General Description
Features
The RT9833 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 1V to 5V, which covers most digital
applications. It features low supply current of 3μA. The
RT9833 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,
z Internally Fixed Threshold 1V 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 N-Channel Open-Drain Output
z Small SC-82 Package
z RoHS Compliant and Halogen Free
just pull the manual reset input (MR) below the specified
V_IL level. The RT9833 is available in the SC-82 package.
Applications
z Computers
Ordering Information
z Controllers
RT9833 ^-
z Intelligent Instruments
Package Type
Y : SC-82
Lead Plating System
z Critical μP and μC Power Monitoring
z Portable/Battery-Powered Equipment
G : Green (Halogen Free and Pb Free)
Threshold Voltage
Marking Information
12 : 1.2V
13 : 1.3V
:
For marking information, contact our sales representative
directly or through a Richtek distributor located in your
49 : 4.9V
50 : 5.0V
area.
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)
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.
Simplified Application Circuit
VDD
µp
RESET/
RESET
RT9833
VDD
MR
RESET/ _GND
RESET
Copyright ©2013 Richtek Technology Corporation. All rights reserved.
DS9833-00 May 2013
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
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