RT9801 ETC, RT9801 Datasheet

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RT9801

Manufacturer Part Number
RT9801
Description
USER PROGRAMMABLE MICRO POWER VOLTAGE DETECTORS
Manufacturer
ETC
Datasheet

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General Description
The RT9801 is a micro-power voltage detector
supervising the power supply voltage level for
microprocessors (µP) or digital systems. It provides
user programmable threshold levels with 0.1V step
ranging from 1.5V to 5V, which covers most digital
applications. It features low supply current of 3µA.
Selection of V
connected to GND, VDD or floating for different
threshold voltage settings. Two versions of threshold
voltages, 1.5V ~ 4V and 2.5V ~ 5V, which are
programmed in factory are offered by customer
demands.
The RT9801 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.
Reset signal will release after VDD is recovered and
lasts for the whole period of Reset Active Time-out
period.
RT9801
provided in SOT-26 package.
Ordering Information
RT9801
DS9801-00 January 2002
is
N-channel,
TH
User Programmable Micro-Power Voltage Detectors
Operating temperature range
C: Commercial standard
Reset Threshold
A : 2.5V~5V
B : 1.5V~4V
Package Type
E : SOT-26
is easily achieved through 3 pins
open-drain
output
Preliminary
and
Features
Applications
Pin Configurations
Typical Application Circuit
RT9801 CE
(Plastic SOT-26)
Part Number
User Programmable Threshold 1.5V to 5V in
0.1V Step with ± ± ± ± 3% Accuracy
Low Supply Current 3µ µ µ µ A
Quick Reset within 20µ µ µ µ S
Built-in Recovery Delay 200mS
Low Functional Supply Voltage 0.9V
Small SOT-26 Package
Computers
Controllers
Intelligent Instruments
Critical µP and µC Power Monitoring
Portable/Battery-Powered Equipment
VDD
µP
RESET
RT9801B V
GND
Pin Configurations
TH
6
1
Pull Up
= 2.5V in this example
5
2
VSET0
GND
RESET
www.richtek-ic.com.tw
4
3
RT9801
RT9801
VSET1
VSET2
TOP VIEW
1. VSET0
2. GND
3. RESET
4. VDD
5. VSET2
6. VSET1
VDD
1

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RT9801 Summary of contents

Page 1

... User Programmable Micro-Power Voltage Detectors General Description The RT9801 is a micro-power voltage detector supervising the power supply voltage level for microprocessors (µP) or digital systems. It provides user programmable threshold levels with 0.1V step ranging from 1.5V to 5V, which covers most digital applications. It features low supply current of 3µA. ...

Page 2

... RT9801 Pin Description Pin Name Pin Function VSET0 Threshold Voltage Selection Pin 1 GND Ground Pin RESET Reset Pulse Output, Negative Pulse VDD Power Pin VSET1 Threshold Voltage Selection Pin 2 VSET2 Threshold Voltage Selection Pin 3 Function Block Diagram Internal Clock VSET0 VSET1 ...

Page 3

... 27° < 3.5mA SINK -0.3V to 6.0V -0.3V to VDD+0.3V 20mA 0.25W -40°C ~ 125°C -65°C ~ 125°C 250°C /W 260°C Min Typ Max 0 3.3 -- Note1 -- -- 200 -- -- -- 0.15V 0.85V DD -- 0.4 -- www.richtek-ic.com.tw RT9801 Units V µ µ ...

Page 4

... RT9801 Note 1: Pin Conditions for Programmable Threshold Voltage Setting RT9801A 5 4.9 4.8 4.7 4.6 4.5 4.4 4.3 4.2 4.1 4 3.9 3.8 3.7 3.6 3.5 3.4 3.3 3.2 3.1 3 2.9 2.8 2.7 2.6 2 bond bond to GND bonding DD DD www.richtek-ic.com.tw 4 Preliminary RT9801B Vset0 input 3.1 floating 3 floating 2.9 floating 2.8 floating 2.7 floating 2.6 floating 2.5 floating 2 ...

Page 5

... Max 0.889 1.295 -- 0.152 1.397 1.803 0.356 0.559 2.591 2.997 2.692 3.099 0.838 1.041 0.102 0.254 0.356 0.610 SOT- 26 Surface Mount Package RT9801 H L Dimensions In Inches Min Max 0.035 0.051 -- 0.006 0.055 0.071 0.014 0.022 0.102 0.118 0.106 0.122 0.033 0.041 ...

Page 6

... RT9801 RICHTEK TECHNOLOGY CORP. Headquarter 6F, No. 35, Hsintai Road, Chupei City Hsinchu, Taiwan, R.O.C. Tel: (8863)5510047 Fax: (8863)5537749 www.richtek-ic.com.tw 6 Preliminary 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: marketing@richtek-ic.com.tw ...

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