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  Richtek Technology Electronic Components Datasheet  

RT9807 Datasheet

Micro-Power Voltage Detector

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RT9807 pdf
RT9807
Micro-Power Voltage Detector with Manual Reset
General Description
The RT9807 is a micro-power voltage detector with
deglitched manual reset input which supervises the power
supply voltage level for microprocessors (μP) or digital
systems. It provides internally fixed threshold levels
ranging from 1.2V to 3.3V with 0.1V per step, which covers
most digital applications. It features low supply current of
3μA.
The RT9807 performs supervisory function by sending out
a reset signal whenever the VDD voltage falls below a
preset threshold level. The timeout period of this reset
signal can be adjusted via an external capacitor. Once
VDD recovers above the threshold level, the reset signal
will be released after a certain delay time. To manually
pull reset signal low, just pull the manual reset input (MR)
below the specified logic-low level.
The RT9807 is available in an SOT-23-5 package.
Features
z Monitor System Voltages from 0.9V to 5.5V
z Capacitor-Adjustable Reset Timeout Period
z Manual Reset Input
z Low Quiescent Current
z High Accuracy ±1.5%
z Low Functional Supply Voltage 0.9V
z N-Channel Open-Drain Output
z Small SOT-23-5 Package
z RoHS Compliant and Halogen Free
Applications
z Computers
z Controllers
z Intelligent Instruments
z Critical uP and uC Power Monitoring
z Portable/Battery-Powered Equipment
Ordering Information
RT9807-
Package Type
B : SOT-23-5
Pin Configurations
(TOP VIEW)
VDD
CT
54
Lead Plating System
G : Green (Halogen Free and Pb Free)
23
Output Voltage
12 : 1.2V
13 : 1.3V
RST GND MR
SOT-23-5
Note :
:
32 : 3.2V
33 : 3.3V
Typical Application Circuit
R
470k
Richtek products are :
`RoHS compliant and compatible with the current require-
ments of IPC/JEDEC J-STD-020.
VDD
5
CIN
RT9807
VDD
RST
1
1uF
Reset
`Suitable for use in SnPb or Pb-free soldering processes.
Marking Information
3 MR GND CT 4
2
CCT
10nF
For marking information, contact our sales representative
directly or through a Richtek distributor located in your
area.
DS9807-01 April 2011
www.richtek.com
1


  Richtek Technology Electronic Components Datasheet  

RT9807 Datasheet

Micro-Power Voltage Detector

No Preview Available !

RT9807 pdf
RT9807
Functional Pin Description
Pin No.
1
Pin Name
RST Reset Output Pin. (Open drain)
Pin Function
2 GND
3 MR
Ground Pin.
Manual Reset Pin.
4 CT
Connect an external capacitor for setting reset timeout period.
5 VDD
Supply Voltage Input Pin.
Function Block Diagram
VDD
N-MOSFET
-
+
Comparator
Timeout
Setting
VREF
Manual
Reset
RST
GND
MR CT
Absolute Maximum Ratings (Note 1)
z Supply Input Voltage, VDD ----------------------------------------------------------------------------------------------- 0.3V to 6V
z Reset Output Voltage, RST --------------------------------------------------------------------------------------------- 0.3V to 6V
z Other Pins ------------------------------------------------------------------------------------------------------------------- 0.3V to 6V
z Power Dissipation, PD @ TA = 25°C
SOT-23-5 -------------------------------------------------------------------------------------------------------------------- 0.4W
z Package Thermal Resistance (Note 2)
SOT-23-5, θJA --------------------------------------------------------------------------------------------------------------- 250°C/W
z Junction Temperature Range -------------------------------------------------------------------------------------------- 150°C
z Lead Temperature (Soldering, 10 sec.) ------------------------------------------------------------------------------- 260°C
z Storage Temperature Range -------------------------------------------------------------------------------------------- 65°C to 150°C
z ESD Susceptibility (Note 3)
HBM (Human Body Mode) ---------------------------------------------------------------------------------------------- 2kV
MM (Machine Mode) ------------------------------------------------------------------------------------------------------ 200V
Recommended Operating Conditions (Note 4)
z Junction Temperature Range -------------------------------------------------------------------------------------------- 40°C to 125°C
z Ambient Temperature Range -------------------------------------------------------------------------------------------- 40°C to 85°C
www.richtek.com
2
DS9807-01 April 2011


Part Number RT9807
Description Micro-Power Voltage Detector
Maker Richtek Technology Corporation
Total Page 7 Pages
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