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RT9817E-50GH

Description
Micro-Power Voltage Detectors with Manual Reset
File Size113KB,11 Pages
ManufacturerRichtek Technology Corporation
Websitehttps://www.richtek.com/
Download Datasheet View All

RT9817E-50GH Overview

Micro-Power Voltage Detectors with Manual Reset

RT9817
Micro-Power Voltage Detectors with Manual Reset
General Description
The RT9817 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 RT9817 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. RT9817 is provided
in SC-82 and
SOT-143 packages.
Features
Internally Fixed Threshold 1.2V to 5V in 0.1V Step
High Accuracy
±
1.5%
Low Supply Current 3μA
μ
No External Components Required
Quick Reset within 20μs
μ
Built-in Recovery Delay Include 0ms, 55ms, 220ms,
450ms Options
800ns Glitch Immunity of Manual Reset Input
Low Functional Supply Voltage 0.9V
CMOS Push-Pull Output
Small SC-82 and SOT-143 Packages
RoHS Compliant and 100% Lead (Pb)-Free
Applications
Computers
Controllers
Intelligent Instruments
Critical
μP
and
μC
Power Monitoring
Portable/Battery-Powered Equipment
Ordering Information
RT9817
-
Package Type
H : SOT-143
Y : SC-82
Operating Temperature Range
P : Pb Free with Commercial Standard
G : Green (Halogen Free with Commer-
cial Standard)
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)
Pin Configurations
(TOP VIEW)
VDD
4
1
GND
MR
3
2
RESET/
RESET
VDD
4
1
GND
MR
3
2
RESET/
RESET
SOT-143
SC-82
Note
: There is no pin1 indicator on top mark for SC-82 and
SOT-143 types, and pin 1 will be lower left pin when reading
top mark from left to right. Pin2 of SC-82 and Pin1 of SOT-
143 is wider than other pins in each package.
Note :
RichTek Pb-free
and Green 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.
100%matte tin (Sn) plating.
DS9817-07 August 2007
www.richtek.com
1
Marking Information
For marking information, contact our sales representative
directly or through a RichTek distributor located in your
area, otherwise visit our website for detail.
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