RT9819_11 RICHTEK [Richtek Technology Corporation], RT9819_11 Datasheet

no-image

RT9819_11

Manufacturer Part Number
RT9819_11
Description
Micro-Power Voltage Detectors
Manufacturer
RICHTEK [Richtek Technology Corporation]
Datasheet
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 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. RT9819 is provided
SC-82 and
Ordering Information
Note :
Richtek products are :
DS9819-07 April 2011
RT9819
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
SOT-23-3 packages.
-
DD
voltage falls below a preset threshold
Package Type
U3 : SC-70-3
V : SOT-23-3
VL : SOT-23-3 (L-Type)
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
recovered upcrossing the
(RESET)
(RESET)
(RESET)
(RESET)
(RESET)
(RESET)
(RESET)
(RESET)
in SC-70-3,
Features
Applications
Typical Application Circuit
Marking Information
For marking information, contact our sales representative
directly or through a Richtek distributor located in your
area.
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
CMOS Push-Pull Output
Small SC-70-3, SC-82 and SOT-23-3 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
up
GND
RESET/
RESET
RT9819
VDD
RT9819
www.richtek.com
1

Related parts for RT9819_11

RT9819_11 Summary of contents

Page 1

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 ...

Page 2

RT9819 Pin Configurations VDD GND RESET/ GND RESET/ RESET RESET SC-70-3 SC-82 Functional Pin Description Pin Name Pin Function GND Ground RESET Active Low Push-Pull Reset Output RESET Active High Push-Pull Reset Output VDD Power Pin Function ...

Page 3

Absolute Maximum Ratings Terminal Voltage (with Respect to GND) V ------------------------------------------------------------------------------------------------------------------------ DD All Other Inputs -------------------------------------------------------------------------------------------------------- Input Current, I ----------------------------------------------------------------------------------------------------- 20mA VDD Power Dissipation 25°C A SC-70-3/SC-82 --------------------------------------------------------------------------------------------------------- 0.25W SOT-23-3 ---------------------------------------------------------------------------------------------------------------- 0.4W Package Thermal Resistance (Note ...

Page 4

RT9819 Parameter Symbol RESET Output Voltage High V RESET Output Voltage Low V RESET Output Voltage High V Note 1. Stresses listed as the above “Absolute Maximum Ratings” may cause permanent damage to the device. These are for stress ratings. ...

Page 5

Typical Operating Characteristics Nch Driver Output Current vs. V 2.4 RT9819A-12 2 1.6 1.2 0.8 0 0.3 0.6 V Nch Driver Output Current vs. V 120 RT9819A-45 100 Supply ...

Page 6

RT9819 Supply Current vs. Input Voltage 4 RT9819A- Input Voltage (V) Power-Down Reset Delay vs. Temperature 45 RT9819C- 200mV DROP -50 -25 ...

Page 7

Reset Threshold Deviation vs. Temperature 6.00 RT9819 5.00 4.00 3.00 2.00 1.00 -50 - Temperature Power-Up Reset Time-Out vs. Temperature 500 RT9819C 400 V = 2.9V TH 300 V = 3.0V 200 TH 100 0 -50 -25 0 ...

Page 8

RT9819 Nch Driver Output Current vs. Input Voltage 60 RT9819G- 0. Input Voltage (V) Output Voltage vs. Input Voltage 7 RT9819G- ...

Page 9

Application Information Benefits of Highly Accurate Reset Threshold Most μP supervisor ICs have reset threshold voltages between 1% and 1.5% below the value of nominal supply voltages. This ensures a reset will not occur within 1% of the nominal supply, ...

Page 10

RT9819 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 DS9819-07 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

RT9819 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 to ...

Related keywords