MAX818MEPA

更新时间： 2024-09-17 22:30:15

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	115K
描述
+5V Microprocessor Supervisory Circuits

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MAX818MEPA 数据手册

19-0494; Rev 1; 3/96

+5 V Mic ro p ro c e s s o r S u p e rvis o ry Circ u it s

7,AX819L/M*

_______________Ge n e ra l De s c rip t io n

____________________________Fe a t u re s

The MAX817/MAX818/MAX819 microprocessor (µP)

supervisory circuits simplify power-supply monitoring,

battery control, and chip-enable gating in µP systems

b y re d uc ing the numb e r of c omp one nts re q uire d .

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-

♦ Precision Supply-Voltage Monitor:

4.65V (MAX81_L)

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 ±5% or ±10% power supplies: 4.65V for the L

versions and 4.40V 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)

______________Ord e rin g In fo rm a t io n

_____________________S e le c t o r Gu id e

†

PART

TEMP. RANGE

0°C to +70°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.

✔

—

✔

Battery Freshness Seal

Manual Reset Input

Chip-Enable Gating

—

✔

—

SUFFIX

RESET THRESHOLD (V)

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

4.65

4.40

Pin-Package

µMAX

Low-Power, Pin-

MAX690A/

Compatible Upgrades for: MAX692A

MAX703/

MAX704

—

_________________P in Co n fig u ra t io n s

________________________Ap p lic a t io n s

Battery-Powered Computers and Controllers

Embedded Controllers

TOP VIEW

BATT

RESET

WDI

OUT

Intelligent Instruments

MAX817

Critical µP Monitoring

GND

PFI

Portable Equipment

PFO

DIP/SO/µMAX

Typical Operating Circuit appears at end of data sheet.

Pin Configurations continued at end of data sheet.

*Patents Pending

________________________________________________________________ Maxim Integrated Products

For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800

12 3 4 5 6 7...16

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MAX818MEPA 替代型号

型号	品牌	替代类型	描述	数据表
MAX818MCPA	MAXIM	功能相似	+5V Microprocessor Supervisory Circuits

与MAX818MEPA相关器件

型号	品牌	获取价格	描述	数据表
MAX818MESA	MAXIM	获取价格	+5V Microprocessor Supervisory Circuits
MAX818MESA+	MAXIM	获取价格	Power Supply Management Circuit, Fixed, 1 Channel, CMOS, PDSO8, 0.150 INCH, ROHS COMPLIANT
MAX818MESA+T	MAXIM	获取价格	Power Supply Support Circuit, Fixed, 1 Channel, CMOS, PDSO8, ROHS COMPLIANT, SOP-8
MAX818MESA-T	MAXIM	获取价格	Power Supply Support Circuit, Fixed, 1 Channel, CMOS, PDSO8, 0.150 INCH, SOIC-8
MAX819	ADI	获取价格	+5V微处理器监控电路
MAX819_CPA	MAXIM	获取价格	+5V Microprocessor Supervisory Circuits
MAX819_CSA	MAXIM	获取价格	+5V Microprocessor Supervisory Circuits
MAX819_CUA	MAXIM	获取价格	+5V Microprocessor Supervisory Circuits
MAX819_EPA	MAXIM	获取价格	+5V Microprocessor Supervisory Circuits
MAX819_ESA	MAXIM	获取价格	+5V Microprocessor Supervisory Circuits

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