Datasheet > MAX695

MAX695

更新时间： 2024-11-16 14:57:35

品牌	Logo	应用领域
亚德诺 - ADI		监控微处理器
页数	文件大小	规格书
18页	968K
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微处理器监控电路

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中文翻译

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数据手册

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MAX695 数据手册

MAX690–MAX695

Microprocessor Supervisory Circuits

General Description

Beneﬁts and Features

● Supervisory Function Integration Saves Board Space

while Fully Protecting Microprocessor-Based Systems

• Precision Voltage Monitor

The MAX690 family of supervisory circuits reduces the

complexity and number of components required for

power supply monitoring and battery control functions in

microprocessor systems. These include µP reset and

backup-battery switchover, watchdog timer, CMOS RAM

write protection, and power-failure warning. The MAX690

family significantly improves system reliability and accu-

racy compared to that obtainable with separate ICs or

discrete components.

- 4.65V (MAX690, MAX691, MAX694, MAX695)

- 4.40V (MAX692, MAX693)

• Power OK/Reset Time Delay

- 50ms, 200ms, or Adjustable

• Watchdog Timer

- 100ms, 1.6s, or Adjustable

• Battery Backup Power Switching

• Voltage Monitor for Power Fail or Low Battery

Warning

The MAX690, MAX692, and MAX694 are supplied in

8-pin packages and provide four functions:

● A reset output during power-up, power-down, and

• Minimum External Component Count

brownout conditions.

● Low Power Consumption in Battery Backup Mode

Extends Battery Life

● Battery backup switching for CMOS RAM, CMOS

microprocessor or other low power logic.

• 1µA Standby Current

● A Reset pulse if the optional watchdog timer has not

● Onboard Gating of Chip Enable Signals Protects

been toggled within a specified time.

Against Erroneous Data Written to RAM During Low

● A 1.3V threshold detector for power fail warning, low

battery detection, or to monitor a power supply other

than +5V.

Events

Applications

● Computers

● Controllers

● Intelligent Instruments

● Automotive Systems

● Critical µP Power Monitoring

TheMAX691,MAX693,andMAX695aresuppliedin16-pin

packages and perform all MAX690, MAX692, MAX694

functions, plus:

● Write protection of CMOS RAM or EEPROM.

● Adjustable reset and watchdog timeout periods.

● Separate outputs for indicating a watchdog timeout,

Ordering information appears at end of data sheet.

backup-battery switchover, and low V

Pin Conﬁgurations

TOP VIEW

BATT

OUT

Typical Operating Circuit

MAX690

MAX692

MAX694

RESET

WDI

GND

PFI

PFO

+5V

POWER TO

CMOS RAM

µP

POWER

OUT

BATT

16 RESET

15 RESET

14 WDO

13 CE IN

12 CE OUT

11 WDI

BATT

µP

SYSTEM

OUT

MAX690

MAX691

MAX693

MAX695

RESET

PFO

µP RESET

PFI

GND

BATT ON

LOW LINE

OSC IN

µP NMI

WDI

I/O

LINE

GND

10 PFO

OSC SEL

9 PFI

MAX690 TYPICAL APPLICATION

19-0218; Rev 5; 4/15

12 3 4 5 6 7...18

中文翻译

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与MAX695相关器件

型号	品牌	获取价格	描述	数据表
MAX6950	MAXIM	获取价格	Serially Interfaced, +2.7V to +5.5V, 5- and 8-Digit LED Display Drivers
MAX6950	ADI	获取价格	串行接口、+2.7V至+5.5V、5位或8位LED显示驱动器
MAX6950CEE	MAXIM	获取价格	Serially Interfaced, +2.7V to +5.5V, 5- and 8-Digit LED Display Drivers
MAX6950CEE+	MAXIM	获取价格	LED Driver, 8-Segment, CMOS, PDSO16, 0.150 INCH, 0.025 INCH PITCH, QSOP-16
MAX6950CEE+T	MAXIM	获取价格	LED Driver, 8-Segment, CMOS, PDSO16, 0.150 INCH, 0.025 INCH PITCH, QSOP-16
MAX6950CEE-T	MAXIM	获取价格	LED Driver, 8-Segment, CMOS, PDSO16, 0.150 INCH, 0.025 INCH PITCH, MO-137AA, QSOP-16
MAX6950EEE	MAXIM	获取价格	Serially Interfaced, +2.7V to +5.5V, 5- and 8-Digit LED Display Drivers
MAX6950EEE-T	MAXIM	获取价格	暂无描述
MAX6950-MAX6951	MAXIM	获取价格	Serially Interfaced, +2.7V to +5.5V, 5- and 8-Digit LED Display Drivers
MAX6951	MAXIM	获取价格	Serially Interfaced, +2.7V to +5.5V, 5- and 8-Digit LED Display Drivers

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