RT9802 Datasheet, PDF (1/5 Pages) Richtek Technology Corporation – User Programmable Micro-Power Voltage Detectors

Preliminary
RT9802
User Programmable Micro-Power Voltage Detectors
General Description
The RT9802 is a micro-power voltage detector
supervising the power supply voltage level for
microprocessors (μP) or digital systems. It provides user
programmable threshold levels with 0.1V step ranging
from 1.5V to 5V, which covers most digital applications. It
features low supply current of 3μA. Selection of V_TH is
easily achieved through 3 pins connected to GND, V_DD or
floating for different threshold voltage settings. Two versions
of threshold voltages, 1.5V to 4V and 2.5V to 5V, which
are programmed in factory are offered by customer
demands.
The RT9802 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. Reset signal will release after V_DD
is recovered and lasts for the whole period of Reset Active
Time-out period.
RT9802 is CMOS, active-low output and provided in
SOT-23-6 package.
Ordering Information
RT9802-
Package Type
E : SOT-23-6
Operating Temperature Range
P : Pb Free with Commercial Standard
G : Green (Halogen Free with Commer-
cial Standard)
Reset Threshold
A : 2.5V to 5V
B : 1.5V to 4V
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.
Features
z User Programmable Threshold 1.5V to 5V in 0.1V
Step with ± 3% 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 Small SOT-23-6 Package
z RoHS Compliant and 100% Lead (Pb)-Free
Applications
z Computers
z Controllers
z Intelligent Instruments
z Critical μP and μC Power Monitoring
z Portable/Battery-Powered Equipment
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.
Pin Configurations
(TOP VIEW)
VSET1 VSET2 VDD
65 4
123
VSET0 GND _RESET
SOT-23-6
Note : There is no pin1 indicator on top mark for SOT-23-6
type, and pin 1 will be lower left pin when reading top mark
from left to right.
DS9802-07 March 2007
www.richtek.com
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