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RT9819_13 Datasheet, PDF (1/13 Pages) Richtek Technology Corporation – Micro-Power Voltage Detectors
®
RT9819
Micro-Power Voltage Detectors
General Description
The RT9819 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 1.2V to 5V, which
covers most digital applications. It features low supply
current of 3μA. The RT9819 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 upcrossing the threshold level, the reset signal
will be released after a certain delay time. The RT9819 is
provided in SC-70-3, SC-82, SOT-23-3 and WDFN-6L
1.6x1.6 packages.
Ordering Information
RT9819 -
Package Type
U3 : SC-70-3
V : SOT-23-3
VL : SOT-23-3 (L-Type)
Y : SC-82
YR : SC-82 (R-Type)
QW : WDFN-6L 1.6x1.6 (W-Type)
Lead Plating System
P : Pb Free
G : Green (Halogen Free and Pb Free)
Note :
Threshold Voltage
12 : 1.2V
13 : 1.3V
:
49 : 4.9V
50 : 5.0V
Reset Active Timeout Period
A = 0ms (RESET)
B = 55ms (RESET)
C = 220ms (RESET)
D = 450ms (RESET)
E = 0ms (RESET)
F = 55ms (RESET)
G = 220ms (RESET)
H = 450ms (RESET)
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.
Copyright ©2013 Richtek Technology Corporation. All rights reserved.
DS9819-08 July 2013
Features
z Internally Fixed Threshold 1.2V to 5V in 0.1V Step
z High Accuracy ±1.5%
z Low Supply Current 3μA
z No External Components Required
z Quick Reset within 20μs
z Built-in Recovery Delay Include 0ms, 55ms, 220ms,
450ms Options
z Low Functional Supply Voltage 0.9V
z CMOS Push-Pull Output
z Small SC-70-3, SC-82, SOT-23-3 and WDFN-6L
1.6x1.6 Packages
z RoHS Compliant and Halogen Free
Applications
z Computers
z Controllers
z Intelligent Instruments
z Critical μP and μC Power Monitoring
z Portable/Battery-Powered Equipment
Typical Application Circuit
VDD
up
RESET/
RESET
RT9819
GND VDD
RESET/
RESET
Marking Information
For marking information, contact our sales representative
directly or through a Richtek distributor located in your
area.
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
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