Datasheet > RT9819D-50PY

RT9819D-50PY

更新时间： 2024-11-08 05:05:11

品牌	Logo	应用领域
立锜 - RICHTEK		/
页数	文件大小	规格书
12页	125K
描述
Micro-Power Voltage Detectors

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RT9819D-50PY 数据手册

RT9819

Micro-Power Voltage Detectors

General Description

Features

^zInternally Fixed Threshold 1.2V to 5V in 0.1V Step

The RT9819 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 1.2V to 5V, which covers most digital applications. It

features low supply current of 3μA. The RT9819 performs

supervisory function by sending out a reset signal

whenever the V_DDvoltage falls below a preset threshold

level. This reset signal will last the whole period before

V_DDrecovering. Once V_DDrecovered upcrossing the

threshold level, the reset signal will be released after a

certain delay time. RT9819 is provided in SC-70-3,

SC-82 and SOT-23-3 packages.

^zHigh Accuracy 1.5%

^zLow Supply Current 3μA

^zNo External Components Required

^zQuick Reset within 20μs

^zBuilt-in Recovery Delay Include 0ms, 55ms, 220ms,

450ms Options

^zLow Functional Supply Voltage 0.9V

^zCMOS Push-Pull Output

^zSmall SC-70-3, SC-82 and SOT-23-3 Packages

z RoHS Compliant and 100% Lead (Pb)-Free

Applications

z Computers

Ordering Information

z Controllers

RT9819

z Intelligent Instruments

z Critical μP and μC Power Monitoring

z Portable/Battery-Powered Equipment

Package Type

U3 : SC-70-3

V : SOT-23-3

VL : SOT-23-3 (L-Type)

Y : SC-82

YR : SC-82 (R-Type)

Marking Information

Operating Temperature Range

P : Pb Free with Commercial Standard

G : Green (Halogen Free with Commer-

cial Standard)

For marking information, contact our sales representative

directly or through a RichTek distributor located in your

area, otherwise visit our website for detail.

Threshold Voltage

12 : 1.2V

13 : 1.3V

Typical Application Circuit

49 : 4.9V

50 : 5.0V

RT9819

VDD

GND

VDD

Reset Active Timeout Period

A = 0ms (RESET)

RESET/

RESET

B = 55ms (RESET)

C = 220ms (RESET)

D = 450ms (RESET)

E = 0ms (RESET)

RESET/

RESET

F = 55ms (RESET)

G = 220ms (RESET)

H = 450ms (RESET)

Note :

RichTek Pb-free and Green products are :

`RoHS compliant and compatible with the current require-

ments of IPC/JEDEC J-STD-020.

`Suitable for use in SnPb or Pb-free soldering processes.

`100%matte tin (Sn) plating.

DS9819-05 August 2007

www.richtek.com

12 3 4 5 6 7...12

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