Datasheet > RT9817B-49PH

RT9817B-49PH

更新时间： 2025-08-09 04:52:19

品牌	Logo	应用领域
立锜 - RICHTEK		/
页数	文件大小	规格书
11页	115K
描述
Micro-Power Voltage Detectors with Manual Reset

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RT9817B-49PH 数据手册

RT9817

Micro-Power Voltage Detectors with Manual Reset

General Description

Features

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

The RT9817 is a micro-power voltage detector with

deglitched 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 1.2V to 5V, which covers most

digital applications. It features low supply current of 3μA.

The RT9817 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. To pull reset signal

low manually, just pull the manual reset input (MR) below

the specified V_ILlevel. RT9817 is provided in SC-82 and

SOT-143 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

^z800ns Glitch Immunity of Manual Reset Input

^zLow Functional Supply Voltage 0.9V

^zCMOS Push-Pull Output

z Small SC-82 and SOT-143 Packages

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

Applications

z Computers

z Controllers

z Intelligent Instruments

z Critical μP and μC Power Monitoring

z Portable/Battery-Powered Equipment

Ordering Information

RT9817

Package Type

H : SOT-143

Y : SC-82

Pin Configurations

Operating Temperature Range

P : Pb Free with Commercial Standard

G : Green (Halogen Free with Commer-

cial Standard)

(TOP VIEW)

VDD

Threshold Voltage

12 : 1.2V

13 : 1.3V

49 : 4.9V

50 : 5.0V

GND

RESET/

RESET

GND

RESET/

RESET

Reset Active Timeout Period

A = 0ms (RESET)

B = 55ms (RESET)

C = 220ms (RESET)

D = 450ms (RESET)

E = 0ms (RESET)

F = 55ms (RESET)

G = 220ms (RESET)

H = 450ms (RESET)

SOT-143

SC-82

Note : There is no pin1 indicator on top mark for SC-82 and

SOT-143 types, and pin 1 will be lower left pin when reading

top mark from left to right. Pin2 of SC-82 and Pin1 of SOT-

143 is wider than other pins in each package.

Note :

Marking Information

RichTek Pb-free and Green products are :

`RoHS compliant and compatible with the current require-

ments of IPC/JEDEC J-STD-020.

For marking information, contact our sales representative

directly or through a RichTek distributor located in your

area, otherwise visit our website for detail.

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

`100%matte tin (Sn) plating.

DS9817-07 August 2007

www.richtek.com

12 3 4 5 6 7...11

中文翻译

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与RT9817B-49PH相关器件

型号	品牌	获取价格	描述	数据表
RT9817B-49PY	RICHTEK	获取价格	Micro-Power Voltage Detectors with Manual Reset
RT9817B-50GH	RICHTEK	获取价格	Micro-Power Voltage Detectors with Manual Reset
RT9817B-50GY	RICHTEK	获取价格	Micro-Power Voltage Detectors with Manual Reset
RT9817B-50PH	RICHTEK	获取价格	Micro-Power Voltage Detectors with Manual Reset
RT9817B-50PY	RICHTEK	获取价格	Micro-Power Voltage Detectors with Manual Reset
RT9817C	RICHTEK	获取价格	暂无描述
RT9817C-12GH	RICHTEK	获取价格	Micro-Power Voltage Detectors with Manual Reset
RT9817C-12GY	RICHTEK	获取价格	Micro-Power Voltage Detectors with Manual Reset
RT9817C-12PH	RICHTEK	获取价格	Micro-Power Voltage Detectors with Manual Reset
RT9817C-12PY	RICHTEK	获取价格	Micro-Power Voltage Detectors with Manual Reset

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