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PDF RT9808 Data sheet ( Hoja de datos )
| Número de pieza | RT9808 | |
| Descripción | Micro-Power Voltage Detectors | |
| Fabricantes | Richtek | |
| Logotipo |  |
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Preliminary
RT9808
Micro-Power Voltage Detectors
General Description
Features
The RT9808 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 1.5V to 5V, which covers most digital applications. It
features low supply current of 3µA.
The RT9808 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 up-
crossing the threshold level, the reset signal will be
released if VDD is above threshold and last for the whole
period of reset active time out.
RT9808 is N-Channel, open-drain output.
Ordering Information
Internally Fixed Threshold 1.5V to 5V in 0.1V Step
±2% Accuracy
Low Supply Current 3µA
Quick Reset within 20µs
Built-in Recovery Delay 200ms
Low Functional Supply Voltage 0.9V
N-Channel Open Drain Output
Small 3-Pin SOT-23/SOT89 and 5-Pin SOT-25
Packages
Applications
Computers
Controllers
Intelligent Instruments
Critical mP and mC Power Monitoring
Portable/Battery-Powered Equipment
RT9808
Package Type
Pin Configurations
V : SOT-23
B : SOT-25
(TOP VIEW)
X : SOT-89
RESET 1
RESET
Operating Temperature Range
C : Commercial Standard
3 VDD
VDD
P : Pb Free with Commercial Standard
Reset Threshold
GND 2
GND
15 : 1.5V
16 : 1.6V
SOT-23
:
49 : 4.9V
50 : 5.0V
RESET
1
15
2
34
SOT-25
NC
NC
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.
VDD
GND
2
3
SOT-89
DS9808-03 April 2004
www.richtek.com
1
1 page  
Preliminary
RT9808
Typical Operating Characteristics
Nch Driver Output Current vs. VDS
7
6 1.7V
5
4 1.5V
3
2
1 TA=25°C
RT9808-20CV
0
0 0.5 1 1.5 2 2.5 3
VDS (V)
Nch Driver Output Current vs. VDS
12
2.2V
10
2.0V
8
6
4 1.5V
2 TA=25°C
RT9808-24CV
0
0 0.5 1 1.5 2 2.5 3
VDS (V)
Nch Driver Output Current vs. VDS
18
2.8V
15
12
9
2.0V
6
3
1.5V
TA=25°C
RT9808-30CV
0
0 0.5 1 1.5 2 2.5 3
VDS (V)
36
30
24
18
12
6
0
0
Nch Driver Output Current vs. VDS
4.0V
3.5V
3.0V
2.5V
2.0V
1.5V
TA=25°C
RT9808-50CV
123
VDS (V)
4
Nch Driver output Current vs. VDS
40
4.5V
32 4.0V
3.5V
24
3.0V
16
2.5V
8
2.0V
TA=25°C
1.5V
RT9808-45CV
0
012345
VDS (V)
Output Voltage vs. Input Voltage
7
TA=25°C
6
5.0V
5 4.5V
4 3.0V
3 2.4V
2 2.0V
1
0
0.0 1.0 2.0 3.0 4.0 5.0 6.0
Input Voltage VIN (V)
DS9808-03 April 2004
www.richtek.com
5
5 Page 
Preliminary
RT9808
D
D1 A
CB
ee
C1
A
H
b b1 b
Symbol
A
b
B
b1
C
C1
D
D1
e
H
Dimensions In Millimeters
Min Max
1.397
1.600
0.356
0.483
2.388
2.591
0.406
0.533
-- 4.242
0.787
1.194
4.394
4.597
1.397
1.753
1.448
1.549
0.355
0.432
Dimensions In Inches
Min Max
0.055
0.063
0.014
0.019
0.094
0.102
0.016
0.021
-- 0.167
0.031
0.047
0.173
0.181
0.055
0.069
0.057
0.061
0.014
0.017
3-Lead SOT-89 Surface Mount Package
RICHTEK TECHNOLOGY CORP.
Headquarter
5F, No. 20, Taiyuen Street, Chupei City
Hsinchu, Taiwan, R.O.C.
Tel: (8863)5526789 Fax: (8863)5526611
DS9808-03 April 2004
RICHTEK TECHNOLOGY CORP.
Taipei Office (Marketing)
8F-1, No. 137, Lane 235, Paochiao Road, Hsintien City
Taipei County, Taiwan, R.O.C.
Tel: (8862)89191466 Fax: (8862)89191465
Email: [email protected]
www.richtek.com
11
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet RT9808.PDF ] | |
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