rt9811 ETC-unknow, rt9811 Datasheet

rt9811

Manufacturer Part Number

rt9811

Description

Micro-power Voltage Detectors

Manufacturer

ETC-unknow

Datasheet

1.RT9811.pdf (6 pages)

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Download datasheet (144Kb)

General Description

The RT9811 is a micro-power voltage detector with

de-glitched manual reset input 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.

The RT9811 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. To pull reset signal low manually,

just pull the manual reset input (MR) below the

specified V

RT9811 is provided in SOT-25 package.

Applications

Ordering Information

RT9811-

DS9811-00 June 2001

Computers

Controllers

Intelligent Instruments

Critical µP and µC Power Monitoring

Portable/Battery-Powered Equipment

level.

Operating temperature range

C: Commercial standard

Reset Threshold

15 : 1.5V

16 : 1.6V

49 : 4.9V

50 : 5.0V

Package Type

B : SOT-25

Preliminary

Micro-Power Voltage Detectors

Features

Pin Configurations

Typical Application Circuit

RT9811-

(SOT-25)

Part Number

Internally Fixed Threshold 1.5V to 5V in 0.1V

Step

± ± ± ± 2% Accuracy

Low Supply Current 2.5µ µ µ µ A

No External Components Required

Quick Reset within 20µ µ µ µ S

Built-in Recovery Delay 400mS

100nS Glitch Immunity of Manual Reset Input

Low Functional Supply Voltage 0.9V

Small 4-Pin SOT-25 Package

VDD

µP

RESET

GND

RESET

Pin Configurations

RT9811

www.richtek-ic.com.tw

VDD

RT9811

TOP VIEW

1. GND

2. NC

3. RESET

4. MR

5. VDD

Related parts for rt9811

rt9811 Summary of contents

Page 1

... General Description The RT9811 is a micro-power voltage detector with de-glitched manual reset input 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 2.5µ ...

Page 2

... RT9811 Pin Description Pin Name Pin Function GND Ground Pin NC Not Connected RESET Reset Pulse Output, Negative Pulse MR Manual Reset Input, Pull Low to Reset, Internally Pulled High with 1µA Current Source VDD Power Pin Function Block Diagram Threshold Voltage Setting www.richtek-ic.com.tw ...

Page 3

... DD TH SINK -0.3V to 6.0V -0.3V to VDD+0.3V 20mA 1mA 20mA 0.25W -40°C ~ 125°C -65°C ~ 125°C 250°C /W 260°C Min Typ 0 2 Note1 -- -- -- 400 -- 400 -- 0.8 -- 100 -- 0.85V > 1mA 0. 0.2V DD RT9811 Max Units µ µ µ www.richtek-ic.com.tw 3 ...

Page 4

... RT9811 Package Information C A Symbol www.richtek-ic.com.tw 4 Preliminary Dimensions In Millimeters Min Max 0.889 1.295 0.000 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- 25 Surface Mount Package H L Dimensions In Inches ...

Page 5

... DS9811-00 June 2001 Preliminary RT9811 www.richtek-ic.com.tw 5 ...

Page 6

... RT9811 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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