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  Richtek Technology Electronic Components Datasheet  

RT9828 Datasheet

Dual Micro-Power Voltage Detectors

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RT9828 pdf
RT9828
Dual Micro-Power Voltage Detectors
General Description
The RT9828 is a micro-power voltage detector supervising
the power supply voltage level for microprocessors (uP) or
digital systems. It provides internally fixed threshold levels
ranging from 1.2V to 5V, which covers most digital
applications. It features low supply current of 6uA. The
RT9828 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 the VDD exceeds the threshold
level, the reset signal will be released after a certain delay
time. The RT9828 is available in SOT-23-6 package.
Ordering Information
RT9828-
Package Type
E : SOT-23-6
Lead Plating System
P : Pb Free
G : Green (Halogen Free and Pb Free)
Note :
Threshold Voltage : RESET1/RESET2
WP : 1.6V/3.0V
GP : 1.8V/3.0V
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.
Features
z High Accuracy ±1.5%
z Low Supply Current 6uA
z Quick Reset within 20us
z Built-in 55ms Recovery Delay
z Low Functional Supply Voltage 0.9V
z Dual N-Channel Open-Drain Output
z Small SOT-23-6 Packages
z RoHS Compliant and 100% Lead (Pb)-Free
Applications
z Computers
z Controllers
z Intelligent Instruments
z Critical uP and uC Power Monitoring
z Portable/Battery-Powered Equipment
Pin Configurations
(TOP VIEW)
RESET1 GND VDD2
654
23
VDD1 NC RESET2
SOT-23-6
Marking Information
For marking information, contact our sales representative
directly or through a Richtek distributor located in your
area.
DS9828-02 April 2011
Downloaded from Elcodis.com electronic components distributor
www.richtek.com
1


  Richtek Technology Electronic Components Datasheet  

RT9828 Datasheet

Dual Micro-Power Voltage Detectors

No Preview Available !

RT9828 pdf
RT9828
Typical Application Circuit
100k
VDD1
VDD2
RT9828
1 VDD1 RESET1 6
GND 5
4 VDD2 RESET2 3
RESET1
RESET2
100k
Functional Pin Description
Pin No. Pin Name
Pin Function
1 VDD1
Input of Detector1.
2 NC
No Internal Connection. It should be floating.
3 RESET2
Active Low Open-Drain Reset Pin of Detector2.
4 VDD2
Input of Detector2.
5 GND
Ground.
6 RESET1
Active Low Open-Drain Reset Pin of Detector1.
Function Block Diagram
VDD1
VDD2
VSET1
CMP
Timer
Threshold
Voltage Setting
POR
Power On Reset
VSET2
CMP
Timer
Threshold
Voltage Setting
POR
Power On Reset
N MOS
RESET1
GND
N MOS
RESET2
Available Voltage Version
Code C
B
FWGD Y
HE
J
K
Voltage 1.2 1.3 1.5 1.6 1.8 1.85 1.9 2 2.1 2.5 2.6
Code T L M N V P Q R S T --
Voltage 2.65 2.7 2.8 2.85 2.9 3 3.1 3.2 3.3 5
--
www.richtek.com
2
DS9828-02 April 2011
Downloaded from Elcodis.com electronic components distributor


Part Number RT9828
Description Dual Micro-Power Voltage Detectors
Maker Richtek Technology Corporation
Total Page 7 Pages
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