RT9827 Datasheet, PDF (1/14 Pages) Richtek Technology Corporation – Micro-Power Voltage Detector

RT9827
Micro-Power Voltage Detector
General Description
The RT9827 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 RT9827 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. Once V_DD recovered
upcrossing the threshold level, the reset signal will be
released after a certain delay time. RT9827 is provided in
SC-82, SC-70-3, SOT-23-3, SOT-23-5 and SOT-89
packages.
Ordering Information
RT9827 -
Package Type
U3 : SC-70-3
V : SOT-23-3
VL : SOT-23-3 (L-Type)
B : SOT-23-5
X : SOT-89
Y : SC-82
YR : SC-82 (R-Type)
Lead Plating System
P : Pb Free
G : Green (Halogen Free and Pb Free)
Threshold Voltage
12 : 1.2V
13 : 1.3V
:
49 : 4.9V
50 : 5.0V
Note :
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.
DS9827-01 April 2011
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 N-Channel Open-Drain Output
z Small SC-82, SC-70-3, SOT-23-3, SOT-23-5, SOT-89
Packages
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.
Typical Application Circuit
VDD
µP
RESET/
RESET
100k
Pull Up
RT9827
GND
VDD
RESET/
RESET
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