RT9809-15CV [ETC]
MICRO POWER VOLTAGE DETECTORS; 微功耗电压检测器
| 型号： | RT9809-15CV |
| 厂家： | 
ETC |
| 描述： | MICRO POWER VOLTAGE DETECTORS |
| 文件： | 总6页 (文件大小：143K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Preliminary
RT9809
Micro-Power Voltage Detectors
General Description
Features
The RT9809 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 2.5µA.
z Internally Fixed Threshold 1.5V to 5V in 0.1V
Step
z
2% Accuracy
z Low Supply Current 2.5µA
z No External Components Required
z Quick Reset within 20µS
z Built-in Recovery Delay 400mS
z Low Functional Supply Voltage 0.9V
z Small 3-Pin SOT-23 Package
The RT9809 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 after a certain delay
time. A 5% hysteresis splits the rising and falling
threshold levels.
Pin Configurations
Part Number
Pin Configurations
TOP VIEW
RT9809-ꢀꢀCV
(SOT-23)
3
1. GND
2. RESET
3. VDD
1
2
RT9809 is provided in SOT-23 package.
Applications
Typical Application Circuit
z Computers
z Controllers
z Intelligent Instruments
z Critical µP and µC Power Monitoring
z Portable/Battery-Powered Equipment
VDD
RT9809
GND
µ
P
VDD
Ordering Information
RESET
RESET
RT9809-ꢀꢀ ꢀ ꢀ
Package Type
V : SOT-23
Operating temperature range
C: Commercial standard
Reset Threshold
15 : 1.5V
16 : 1.6V
:
49 : 4.9V
50 : 5.0V
DS9809-00 June 2001
www.richtek-ic.com.tw
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RT9809
Preliminary
Pin Description
Pin Name
GND
Pin Function
Ground Pin
RESET
VDD
Reset Pulse Output, Negative Pulse
Power Pin
Function Block Diagram
VDD
P
VDD
CMP
RESET
TIMER
VSET
N
Threshold Voltage Setting
POR
Power On Reset
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DS9809-00 June 2001
2
Preliminary
RT9809
Absolute Maximum Ratings
z Terminal Voltage (with Respect to GND)
VDD
-0.3V to 6.0V
All Other Inputs
z Input Current, VDD
z Output Current, RESET
-0.3V to VDD+0.3V
20mA
20mA
z Power Dissipation, P @ T = 25°C
D
A
SOT-23
0.25W
z Operating Junction Temperature Range
z Storage Temperature Range
-40°C ~ 125°C
-65°C ~ 125°C
z Package Thermal Resistance
SOT-23, θ
z Lead Temperature (Soldering, 5sec.)
250°C /W
260°C
JA
Electrical Characteristics
(VDD = 3.0, unless specified)
Parameter
Symbol
Test Conditions
Min
0.9
--
Typ
--
Max
6
Units
V
Operating VDD (V
) Range
V
DD
OUT
Supply Current
Reset Threshold
2.5
Note1
--
--
I
V
= 1.5V ~ 5V, I = 0
OUT
µA
V
DD
DD
--
--
V
TH
T = 27°C
A
Threshold Voltage Accuracy
--
2
%
∆V
T = 27°C
TH
RD
RP
A
--
25
--
V
V
= 5V, Drop = -20mV
= 1.5V, Drop = -20mV
DD
DD
V
CC
Drop to Reset Delay
t
t
µS
mS
V
--
5
--
Reset Active Time Out Period
--
400
--
V
≥ 1.02×V
TH
DD
DD
DD
--
--
V
OH
V
OL
V
V
> V , I
> 1mA
0.8V
0.2V
TH SOURCE
DD
DD
RESET Output Voltage
--
--
< V , I
> 3.5mA
TH SINK
Note1: 1.5V ~ 5V, step 0.1V
DS9809-00 June 2001
www.richtek-ic.com.tw
3
RT9809
Package Information
Preliminary
D
B
C
e
A
H
L
b
A1
Dimensions In Millimeters
Dimensions In Inches
Symbol
Min
0.889
--
Max
Min
0.035
--
Max
A
A1
B
1.295
0.152
1.803
0.508
2.997
3.099
2.007
0.254
0.610
0.051
0.006
0.071
0.020
0.118
0.122
0.079
0.010
0.024
1.397
0.356
2.591
2.692
1.803
0.102
0.356
0.055
0.014
0.102
0.106
0.071
0.004
0.014
b
C
D
e
H
L
SOT-23 Plastic Surface Mount
www.richtek-ic.com.tw
DS9809-00 June 2001
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Preliminary
RT9809
DS9809-00 June 2001
www.richtek-ic.com.tw
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RT9809
Preliminary
RICHTEK TECHNOLOGY CORP.
Headquarter
RICHTEK TECHNOLOGY CORP.
Taipei Office (Marketing)
6F, No. 35, Hsintai Road, Chupei City
8F-1, No. 137, Lane 235, Paochiao Road, Hsintien City
Hsinchu, Taiwan, R.O.C.
Taipei County, Taiwan, R.O.C.
Tel: (8863)5510047 Fax: (8863)5537749
Tel: (8862)89191466 Fax: (8862)89191465
Email: marketing@richtek-ic.com.tw
www.richtek-ic.com.tw
DS9809-00 June 2001
6
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