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參數(shù)資料
| 型號： | RT9809-49CV |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | MICRO POWER VOLTAGE DETECTORS |
| 中文描述： | 微功耗電壓檢測器 |
| 文件頁數(shù)： | 1/6頁 |
| 文件大?。?/td> | 142K |
| 代理商： | RT9809-49CV |
Preliminary
RT9809
DS9809-00 June 2001
www.richtek-ic.com.tw
1
Micro-Power Voltage Detectors
General Description
The RT9809 is a micro-power voltage detector
supervising the power supply voltage level for
microprocessors (
μ
P) 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 2.5
μ
A.
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.
RT9809 is provided in SOT-23 package.
Applications
z
Computers
z
Controllers
z
Intelligent Instruments
z
Critical
μ
P and
μ
C Power Monitoring
z
Portable/Battery-Powered Equipment
Ordering Information
RT9809-
Features
z
Internally Fixed Threshold 1.5V to 5V in 0.1V
Step
z
±
2% Accuracy
z
Low Supply Current 2.5
μ
A
z
No External Components Required
z
Quick Reset within 20
μ
S
z
Built-in Recovery Delay 400mS
z
Low Functional Supply Voltage 0.9V
z
Small 3-Pin SOT-23 Package
Pin Configurations
Part Number
Pin Configurations
RT9809-
CV
(SOT-23)
TOP VIEW
1. GND
2. RESET
3. VDD
Typical Application Circuit
1
3
2
Operating temperature range
C: Commercial standard
Reset Threshold
15 : 1.5V
16 : 1.6V
:
49 : 4.9V
50 : 5.0V
Package Type
V : SOT-23
VDD
μ
P
RESET
RT9809
GND
VDD
RESET
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