Datasheet > RT9802A

RT9802A

更新时间： 2024-11-28 23:33:19

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描述
Power Management/Voltage Dector

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中文翻译

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数据手册

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RT9802A 数据手册

Preliminary

RT9802

User Programmable Micro-Power Voltage Detectors

General Description

Features

The RT9802 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_THis easily achieved through 3 pins

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.

z User Programmable Threshold 1.5V to 5V in

0.1V Step with ±3% Accuracy

z Low Supply Current 3µA

z Quick Reset within 20µS

z Built-in Recovery Delay 200mS

z Low Functional Supply Voltage 0.9V

z Small SOT-26 Package

Applications

z Computers

z Controllers

z Intelligent Instruments

z Critical µP and µC Power Monitoring

z Portable/Battery-Powered Equipment

The RT9802 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.

Pin Configurations

Part Number

Pin Configurations

TOP VIEW

RT9802ꢀCE

1. VSET0

2. GND

3. RESET

4. VDD

(Plastic SOT-26)

RT9802 is CMOS, active-low output and provided in

SOT-26 package.

5. VSET2

6. VSET1

Ordering Information

RT9802ꢀ ꢀ ꢀ

Package Type

E : SOT-26

Typical Application Circuit

Operating temperature range

C: Commercial standard

VSET0

VSET1

µP

GND

RT9802

Reset Threshold

A : 2.5V~5V

GND

VSET2

VDD

B : 1.5V~4V

RESET

RT9802B V

= 2.5V in this example

DS9802-00 January 2002

www.richtek.com

12 3 4 5 6

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