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PDF RT9819 Data sheet ( Hoja de datos )
| Número de pieza | RT9819 | |
| Descripción | Micro-Power Voltage Detectors | |
| Fabricantes | Richtek Technology Corporation | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de RT9819 (archivo pdf) en la parte inferior de esta página. Total 12 Páginas | ||
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RT9819
Micro-Power Voltage Detectors
General Description
The RT9819 is a micro-power voltage detector
www.dsautapsheerevt4isu.icnogm 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. RT9819 is provided in SC-70-3,
SC-82 and SOT-23-3 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)
Operating Temperature Range
P : Pb Free with Commercial Standard
G : Green (Halogen Free with Commer-
cial Standard)
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 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.
DS9819-05 August 2007
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 and SOT-23-3 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, otherwise visit our website for detail.
Typical Application Circuit
VDD
up
RESET/
RESET
RT9819
GND VDD
RESET/
RESET
www.richtek.com
1
1 page  
Typical Operating Characteristics
Nch Driver Output Current vs. VDS
2.4
RT9819A-12
2 VDD = 1.1V
www.datasheet4u.com
1.6
1.2
VDD = 1.0V
0.8
0.4
0
0 0.3 0.6 0.9 1.2 1.5
VDS (V)
Nch Driver Output Current vs. VDS
120
RT9819A-45
100
80
60 VDD = 4.4V
= 4.0V
= 3.5V
40 = 3.0V
= 2.5V
20 = 2.0V
= 1.5V
0
012345
VDS (V)
Supply Current vs. Input Voltage
6
RT9819A-12
5 80°C
4
25°C
3
2 -30°C
1
0
0123456
Input Voltage (V)
DS9819-05 August 2007
RT9819
Nch Driver Output Current vs. VDS
60
RT9819C-30
50 VDD = 2.8V
40 VDD = 2.5V
30
VDD = 2.0V
20
10 VDD = 1.5V
0
0 0.5 1 1.5 2 2.5 3 3.5
VDS (V)
Output Voltage vs. Input Voltage
7
RT9819A
6
5
4
5.0V
3
2 2.9V 3.0V
1
0
0123456
Input Voltage (V)
Supply Current vs. Input Voltage
4
RT9819C-30
80°C
3
25°C
2
-30°C
1
0
0123456
Input Voltage (V)
www.richtek.com
5
5 Page 
RT9819
www.datasheet4u.com
D
e
CB
H
L
b b1
A
e
A1
Symbol
A
A1
B
b
b1
C
D
e
H
L
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
1.800
2.200
1.300
0.080
0.260
0.200
0.460
Dimensions In Inches
Min Max
0.031
0.043
0.000
0.004
0.045
0.053
0.006
0.016
0.014
0.020
0.071
0.096
0.071
0.087
0.051
0.003
0.010
0.008
0.018
SC-82 Surface Mount Package
DS9819-05 August 2007
www.richtek.com
11
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet RT9819.PDF ] | |
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