RT9807 Datasheet, PDF (1/7 Pages) Richtek Technology Corporation – Micro-Power Voltage Detector with Manual Reset

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
5
4
Lead Plating System
G : Green (Halogen Free and Pb Free)
2
3
Output Voltage
12 : 1.2V
RST GND MR
SOT-23-5
Note :
13 : 1.3V
:
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.
RT9807
V<sub>DD</sub>
5 <sub>VDD</sub>
C<sub>IN</sub>
RST <sup>1</sup>
1uF
Reset
`Suitable for use in SnPb or Pb-free soldering processes.
Marking Information
3
MR _GND
CT ⁴
2
C_CT
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
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