Datasheet > MAX821_05

MAX821_05

更新时间： 2024-11-15 11:48:19

品牌	Logo	应用领域
美信 - MAXIM		监视器
页数	文件大小	规格书
7页	179K
描述
4-Pin Î¼P Voltage Monitors with Pin-Selectable Power-On Reset Timeout Delay

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MAX821_05 数据手册

19-1122; Rev 3; 12/05

4-Pin µP Voltage Monitors with Pin-Selectable

Power-On Reset Timeout Delay

General Description

Features

♦ Pin-Selectable, Precision Power-On Reset Delay:

The MAX821/MAX822 microprocessor (µP) supervisory

circuits monitor power supplies in µP and digital sys-

tems. They provide excellent circuit reliability and low

cost by eliminating external components and adjust-

ments when used with 5V-powered or 3V-powered cir-

cuits. The MAX821/MAX822 also provide a power-on

reset timeout delay that is pin selectable to 1ms (max),

20ms (min), or 100ms (min).

1ms (max), 20ms (min), or 100ms (min)

♦ Precision Monitoring of +3V to +5V Power-Supply

Voltages

♦ 2.5µA Supply Current

♦ Guaranteed Over Temperature (-40°C to +125°C)

♦ Guaranteed RESET Valid to V

= 1V (MAX821)

These devices perform a single function: they assert a

reset signal whenever the V

supply voltage falls

♦ Power-Supply Transient Immunity

♦ No External Components

♦ SOT143 Package

below a preset threshold, and they keep reset asserted

for the pin-selected reset timeout delay after V has

risen above the reset threshold. The only difference

between the two devices is that the MAX821 has an

active-low RESET output (which is guaranteed to be in

Ordering Information

the correct state for V

down to 1V), while the

PART

NOMINAL V (V)

TOP MARK*

AZ_ _

MAX822 has an active-high RESET output. The reset

comparator is designed to ignore fast transients on

MAX821LUS-T

MAX821MUS-T

MAX821PUS-T

MAX821TUS-T

MAX821SUS-T

MAX821UUS-T

MAX821RUS-T

MAX822LUS-T

MAX822MUS-T

MAX822TUS-T

MAX822SUS-T

MAX822RUS-T

4.63

4.38

4.00

3.08

2.93

2.78

2.63

4.63

4.38

3.08

2.93

2.63

. Reset thresholds suitable for operation with a vari-

BA_ _

BM_ _

BB_ _

BC_ _

BL_ _

ety of supply voltages are available.

Low supply current makes the MAX821/MAX822 ideal

for use in portable equipment. These devices come in a

4-pin SOT143 package.

BD_ _

BF_ _

________________________Applications

Bar-Code Scanners

BG_ _

BH_ _

BJ_ _

Computers

Controllers

BK_ _

Intelligent Instruments

Critical µP and µC Power Monitoring

Portable/Battery-Powered Equipment

* The first two letters in the package top mark identify the part,

while the remaining two letters are the lot-tracking code.

Devices are available in both leaded and lead-free packaging.

Specify lead-free by replacing “-T” with “+T” when ordering.

__________Typical Operating Circuit

Pin Configuration

TOP VIEW

GND

µP

MAX821

MAX822

MAX821

MAX822

RESET

INPUT

RESET

(RESET)

20ms

100ms

1ms

SRT

(RESET) RESET

GND

SOT143

( ) ARE FOR MAX822

________________________________________________________________ Maxim Integrated Products

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

12 3 4 5 6 7

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与MAX821_05相关器件

型号	品牌	获取价格	描述	数据表
MAX8211	MAXIM	获取价格	Microprocessor Voltage Monitors with Programmable Voltage Detection
MAX8211	ADI	获取价格	微处理器电压监测器，可编程检测电压
MAX8211_08	MAXIM	获取价格	Microprocessor Voltage Monitors with Programmable Voltage Detection
MAX8211C/D	MAXIM	获取价格	Voltage Detector
MAX8211CPA	ROCHESTER	获取价格	Power Supply Support Circuit, Adjustable, 1 Channel, CMOS, PDIP8, PLASTIC, DIP-8
MAX8211CPA	MAXIM	获取价格	Microprocessor Voltage Monitors with Programmable Voltage Detection
MAX8211CPA+	MAXIM	获取价格	Power Supply Support Circuit, Adjustable, 1 Channel, CMOS, PDIP8, LEAD FREE, PLASTIC, DIP-
MAX8211CPA-2	MAXIM	获取价格	Voltage Detector
MAX8211CSA	MAXIM	获取价格	Microprocessor Voltage Monitors with Programmable Voltage Detection
MAX8211CSA	ROCHESTER	获取价格	Power Supply Support Circuit, Adjustable, 1 Channel, CMOS, PDSO8, SOP-8

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