MAX817_ESA

更新时间： 2024-11-02 11:14:43

品牌	Logo	应用领域
美信 - MAXIM		微处理器监控
页数	文件大小	规格书
16页	276K
描述
+5V Microprocessor Supervisory Circuits

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MAX817_ESA 数据手册

19-0486; Rev 3; 12/05

+5V Microprocessor Supervisory Circuits

General Description

____________________________Features

♦ Precision Supply-Voltage Monitor:

4.65V (MAX81_L)

The MAX817/MAX818/MAX819 microprocessor (µP)

supervisory circuits simplify power-supply monitoring,

battery control, and chip-enable gating in µP systems

by reducing the number of components required.

These devices are designed for use in +5V-powered

systems. Low supply current (11µA typical) and small

package size make these devices ideal for portable

applications. The MAX817/MAX818/MAX819 are specif-

4.40V (MAX81_M)

♦ 11µA Quiescent Supply Current

♦ 200ms Reset Time Delay

♦ Watchdog Timer with 1.6sec Timeout

(MAX817/MAX818)

ically designed to ignore fast transients on V . Other

♦ Battery-Backup Power Switching; Battery Voltage

supervisory functions include active-low reset, backup-

battery switchover, watchdog input, battery freshness

seal, and chip-enable gating. The Selector Guide below

lists the specific functions available from each device.

Can Exceed V

♦ Battery Freshness Seal

♦ On-Board, 3ns Gating of Chip-Enable Signals

These devices offer two pretrimmed reset threshold volt-

ages for ±5ꢀ or ±1±ꢀ power suppliesꢁ :.45V for the L

versions and :.:±V for the M versions. The MAX817/

MAX818/MAX819 are available in space-saving µMAX

packages, as well as 8-pin DIP/SO.

(MAX818)

♦ Uncommitted Voltage Monitor for Power-Fail or

Low-Battery Warning (MAX817/MAX819)

♦ Manual Reset Input (MAX819)

______________Ordering Information

_____________________Selector Guide

†

PART

TEMP. RANGE

±°C to +7±°C

PIN-PACKAGE

8 Plastic DIP

8 SO

MAX817 MAX818 MAX819

FEATURE

MAX817_CPA

MAX817_CSA

MAX817_CUA

L/M

✔

L/M

✔

L/M

✔

Active-Low Reset

8 µMAX

✔

Backup-Battery Switchover

Power-Fail Comparator

Watchdog Input

Ordering Information continued on last page.

✔

—

✔

†

These parts offer a choice of reset threshold voltage. From the

table below, select the suffix corresponding to the desired

threshold and insert it into the blank to complete the part number.

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

Specify lead free by adding the + symbol at the end of the part

number when ordering.

✔

—

✔

Battery Freshness Seal

Manual Reset Input

Chip-Enable Gating

—

✔

—

8-DIP/SO/ 8-DIP/SO/ 8-DIP/SO/

Pin-Package

µMAX

SUFFIX

RESET THRESHOLD (V)

:.45

:.:±

Low-Power, Pin-

Compatible Upgrades forꢁ MAX492A

MAX49±A/

MAX7±3/

MAX7±:

—

_________________Pin Configurations

________________________Applications

Battery-Powered Computers and Controllers

Embedded Controllers

TOP VIEW

BATT

RESET

WDI

OUT

Intelligent Instruments

Critical µP Monitoring

MAX817

GND

PFI

Portable Equipment

PFO

Typical Operating Circuit appears at end of data sheet.

DIP/SO/µMAX

Pin Configurations continued at end of data sheet.

________________________________________________________________ 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...16

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与MAX817_ESA相关器件

型号	品牌	获取价格	描述	数据表
MAX817L	MAXIM	获取价格	+5V Microprocessor Supervisory Circuits
MAX817L_05	MAXIM	获取价格	+5V Microprocessor Supervisory Circuits
MAX817LCPA	MAXIM	获取价格	Analog IC
MAX817LCPA+	MAXIM	获取价格	Power Supply Management Circuit, Fixed, 1 Channel, CMOS, PDIP8, 0.300 INCH, ROHS COMPLIANT
MAX817LCSA	MAXIM	获取价格	Analog IC
MAX817LCSA	ROCHESTER	获取价格	1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8, 0.150 INCH, SOIC-8
MAX817LCSA+T	MAXIM	获取价格	暂无描述
MAX817LCSA-T	MAXIM	获取价格	Power Supply Support Circuit, Fixed, 1 Channel, CMOS, PDSO8, 0.150 INCH, SOIC-8
MAX817LCUA	MAXIM	获取价格	Analog IC
MAX817LCUA+	ROCHESTER	获取价格	1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDSO8, 3 X 3 MM, ROHS COMPLIANT, MICRO, SOP-10

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