RT9818C-27GB Richtek USA Inc, RT9818C-27GB Datasheet

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RT9818C-27GB

Manufacturer Part Number
RT9818C-27GB
Description
IC VOLT DETECTOR 2.5V SOT23-5
Manufacturer
Richtek USA Inc
Type
Simple Reset/Power-On Resetr
Datasheet

Specifications of RT9818C-27GB

Number Of Voltages Monitored
1
Output
Open Drain or Open Collector
Reset
Active Low
Reset Timeout
143 ms Minimum
Voltage - Threshold
2.7V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
SC-74A, SOT-753
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Micro-Power Voltage Detectors
General Description
The RT9818 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 RT9818 performs
supervisory function by sending out a reset signal
whenever the V
level. This reset signal will last the whole period before
V
threshold level, the reset signal will be released after a
certain delay time. RT9818 is provided in SC-82, SC-70-3,
SOT-23-3, SOT-23-5 and SOT-89 packages.
Ordering Information
Note :
Richtek products are :
DS9818-09 April 2011
RT9818
DD
RoHS compliant and compatible with the current require-
Suitable for use in SnPb or Pb-free soldering processes.
ments of IPC/JEDEC J-STD-020.
recovering. Once V
-
DD
voltage falls below a preset threshold
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
Reset Active Timeout Period
A = 0ms
B = 55ms
C = 220ms
D = 450ms
E = 0ms
F = 55ms
G = 220ms
H = 450ms
:
DD
(RESET)
(RESET)
recovered upcrossing the
(RESET)
(RESET)
(RESET)
(RESET)
(RESET)
(RESET)
Features
Applications
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.
Typical Application Circuit
Internally Fixed Threshold 1.2V to 5V in 0.1V Step
High Accuracy ± ± ± ± ± 1.5%
Low Supply Current 3μ μ μ μ μ A
No External Components Required
Quick Reset within 20μ μ μ μ μ s
Built-in Recovery Delay Include 0ms, 55ms, 220ms,
450ms Options
Low Functional Supply Voltage 0.9V
N-Channel Open-Drain Output
Small SC-82, SC-70-3, SOT-23-3, SOT-23-5, SOT-89
Packages
RoHS Compliant and 100% Lead (Pb)-Free
Computers
Controllers
Intelligent Instruments
Critical μP and μC Power Monitoring
Portable/Battery-Powered Equipment
RESET/
RESET
VDD
μP
Pull Up
100k
RESET/
GND
RESET
RT9818
RT9818
VDD
www.richtek.com
1

Related parts for RT9818C-27GB

RT9818C-27GB Summary of contents

Page 1

Micro-Power Voltage Detectors General Description The RT9818 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 ...

Page 2

RT9818 Pin Configurations GND 4 RESET/ RESET SC-82 VDD 3 2 GND RESET/ RESET SOT-23-3 Functional Pin Description Pin Name Pin Function GND Ground RESET Active Low Open-Drain Reset Output RESET Active High Open-Drain Reset Output VDD Power Pin Function ...

Page 3

... DD Parameter Operating Range DD OUT Supply Current Reset Threshold Threshold Voltage Accuracy V Drop to Reset Delay DD RT9818A/E RT9818B/F Reset Active Time Out Period RT9818C/G RT9818D/H RESET Output Voltage Low (Note 5) Hysteresis Width DS9818-09 April 2011 (Note 1) (Note 4) Symbol Test Conditions 3V 4.5V ...

Page 4

RT9818 Note 1. Stresses listed as the above “Absolute Maximum Ratings” may cause permanent damage to the device. These are for stress ratings. Functional operation of the device at these or any other conditions beyond those indicated in the operational ...

Page 5

... Nch Driver Output Current vs RT9818C- 1. 0 (V) DS Output Voltage vs. Input Voltage 7 RT9818 1. Input Voltage (V) Supply Current vs. Input Voltage 4.0 RT9818C-30 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0 Input Voltage (V) RT9818 2. 2. 2.5 3 3.5 4. 80°C 25°C −30° www.richtek.com 5 ...

Page 6

... Temperature (°C) Power Down Reset Delay vs. Temperature 45 RT9818A- 200mV DROP -50 - Temperature (°C) Nch Driver Sink Current vs. Input Voltage 40 RT9818C-30 0. −30°C 30 25° 0.5 1 1.5 2 Input Voltage (V) DS9818-09 April 2011 = 150mV DROP = 250mV DROP 75 100 125 = 150mV DROP = 250mV DROP ...

Page 7

... Output Delay Time vs. Load Capacitance 1000 100 4.5V TH 0.1 0.01 0.0001 50 75 100 125 Nch Driver Output Current vs. Input Voltage RT9818 RT9818C Temperature (°C) RT9818 4.5V TH 0.0010 0.0100 0.1000 Load Capacitance (µF) RT9818G- 0.5V DS −30°C 25°C 80° Input Voltage (V) www.richtek.com 100 125 1 ...

Page 8

... RT9818G-31 400 300 200 100 0 -50 - Temperature (°C) Power Down Reset Time-Out vs. Temperature 30 RT9818G- 200mV DROP -50 - Temperature (°C) Threshold Voltage vs. Temperature 2.40 RT9818C-22 2.35 2.30 2.25 Rising 2.20 Falling 2.15 2.10 2.05 2.00 -50 - Temperature ( ° C) www.richtek.com 100 125 4.40 4.35 4 ...

Page 9

Application Information Multiple Supplies Mainly, the pull-up connected to the RT9818 will connect to the supply voltage that is being monitored at the IC's However, some systems may use the open-drain output to level-shift from the monitored supply to reset ...

Page 10

RT9818 Outline Dimension Symbol www.richtek.com Dimensions In Millimeters Min Max 0.800 1.100 0.000 0.100 1.150 1.350 0.150 0.400 1.800 2.450 1.800 2.250 1.300 ...

Page 11

Symbol DS9818-09 April 2011 Dimensions In Millimeters Min Max 0.800 1.100 0.000 0.100 1.150 1.350 0.150 0.400 0.350 0.500 1.800 2.450 ...

Page 12

RT9818 Symbol www.richtek.com Dimensions In Millimeters Min Max 0.889 1.295 0.000 0.152 1.397 1.803 0.356 0.508 2.591 2.997 2.692 3.099 1.803 2.007 0.080 ...

Page 13

Symbol DS9818-09 April 2011 Dimensions In Millimeters Min Max 0.889 1.295 0.000 0.152 1.397 1.803 0.356 0.559 2.591 2.997 2.692 3.099 0.838 1.041 0.080 ...

Page 14

RT9818 Symbol Richtek Technology Corporation Headquarter 5F, No. 20, Taiyuen Street, Chupei City Hsinchu, Taiwan, R.O.C. Tel: (8863)5526789 Fax: (8863)5526611 Information that is provided by Richtek Technology Corporation is believed ...

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