RT9808 Datasheet, PDF (1/3 Pages) List of Unclassifed Manufacturers – MICRO POWER VOLTAGE DETECTORS

General Description
The RT9808 is a micro-power voltage detector
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 1.5V to 5V, which covers most digital
applications. It features low supply current of 3µA.
The RT9808 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 VDD recovered up-crossing the threshold level,
the reset signal will be released if VDD is above
threshold and last for the whole period of reset active
time out.
RT9808 is n-channel, open-drain output.
Applications
z Computers
z Controllers
z Intelligent Instruments
z Critical µP and µC Power Monitoring
z Portable/Battery-Powered Equipment
Ordering Information
RT9808-…… … …
Package Type
V : SOT-23
X : SOT-89
B : SOT-25
Operating temperature range
C: Commercial standard
Reset Threshold
15 : 1.5V
16 : 1.6V
:
49 : 4.9V
50 : 5.0V
Product specification
RT9808
Features
z Internally Fixed Threshold 1.5V to 5V in 0.1V Step
z ±2% Accuracy
z Low Supply Current 3µA
z Quick Reset within 20µS
z Built-in Recovery Delay 200mS
z Low Functional Supply Voltage 0.9V
z N-Channel Open Drain Output
z Small 3-Pin SOT-23/SOT89 and 5-Pin SOT-25
Packages
Pin Configurations
Part Number
Pin Configurations
RT9808-……CV
(Plastic SOT-23)
3
1
2
TOP VIEW
1. RESET
2. GND
3. VDD
RT9808-……CX
(Plastic SOT-89)
123
TOP VIEW
1. RESET
2. VDD
3. GND
RT9808-……CB
(Plastic SOT-25)
5
4
123
TOP VIEW
1. RESET
2. VDD
3. GND
4. NC
5. NC
Typical Application Circuit
VDD
µP
Pull
Up
100K
RESET
RT9808
GND
VDD
RESET
http://www.twtysemi.com
[e-mail]
4008-318-123
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