RT9807

®

DS9807-02 December 2015

www.richtek.com

1

©

Copyright 2015 Richtek Technology Corporation. All rights reserved.

is a registered trademark of Richtek Technology Corporation.

General Description

deglitched manual reset input which supervises the power

supply voltage level for microprocessors (

μP) or digital

systems. It provides internally fixed threshold levels

ranging from 1.2V to 3.3V with 0.1V per step, which covers

most digital applications. It features low supply current of

3

μA.

The RT9807 performs supervisory function by sending out

a reset signal whenever the VDD voltage falls below a

preset threshold level. The timeout period of this reset

signal can be adjusted via an external capacitor. Once

VDD recovers above the threshold level, the reset signal

will be released after a certain delay time. To manually

pull reset signal low, just pull the manual reset input (MR)

below the specified logic-low level.

Ordering Information

Pin Configurations

(TOP VIEW)

SOT-23-5

Micro-Power Voltage Detector with Manual Reset

Features

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Monitor System Voltages from 0.9V to 5.5V

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Capacitor-Adjustable Reset Timeout Period

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Manual Reset Input

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Low Quiescent Current

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High Accuracy

±±±±±1.5%

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Low Functional Supply Voltage 0.9V

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N-Channel Open-Drain Output

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Small SOT-23-5 Package

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RoHS Compliant and Halogen Free

Applications

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Computers

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Controllers

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Intelligent Instruments

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Critical uP and uC Power Monitoring

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Portable/Battery-Powered Equipment

Typical Application Circuit

Marking Information

For marking information, contact our sales representative

directly or through a Richtek distributor located in your

area.

GND

VDD

CT

4

23

5

RST

MR

RT9807

GND

Reset

RST

VDD

2

3

51

MR

1uF

10nF

CT

R

470k

4

RT9807-

Package Type

B : SOT-23-5

Lead Plating System

G : Green (Halogen Free and Pb Free)

Output Voltage

12 : 1.2V

13 : 1.3V

:

32 : 3.2V

33 : 3.3V

Note :

Richtek 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.