Datasheet > LTC695

LTC695

更新时间： 2024-09-28 14:58:07

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
20页	265K
描述
微处理器监控电路

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中文翻译

获取价格

数据手册

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LTC695 数据手册

LTC690/LTC691

LTC694/LTC695

Microprocessor

Supervisory Circuits

FeaTures

DescripTion

The LTC^®690 family, LTC690/LTC691/LTC694/LTC695,

provides complete power supply monitoring and battery

control functions for microprocessor reset, battery back-

up, CMOS RAM write protection, power failure warning

and watchdog timing. A precise internal voltage reference

and comparator circuit monitor the power supply line.

When an out-of-tolerance condition occurs, the reset

outputs are forced to active states and the chip enable

output unconditionally write-protects external memory.

In addition, the RESET output is guaranteed to remain

Guaranteed Reset Assertion at V = 1V

1.5mA Maximum Supply Current

Fast (35ns Max) Onboard Gating of RAM Chip

Enable Signals

SO-8 and S16 Packaging

4.65V Precision Voltage Monitor

Power OK/Reset Time Delay: 50ms, 200ms

or Adjustable

Minimum External Component Count

1µA Maximum Standby Current

Voltage Monitor for Power-Fail

logic low even with V as low as 1V.

or Low Battery Warning

Thermal Limiting

The LTC690 family powers the active CMOS RAMs with a

charge pumped NMOS power switch to achieve low drop-

out and low supply current. When primary power is lost,

auxiliary power, connected to the battery input pin, powers

the RAMs in standby through an efficient PMOS switch.

Performance Speciﬁed Over Temperature

Superior Upgrade for MAX690 Family

applicaTions

Foranearlywarningofimpendingpowerfailure,theLTC690

family provides an internal comparator with a user-defined

threshold.Aninternalwatchdogtimerisalsoavailable,which

forces the reset pins to active states when the watchdog

input is not toggled prior to a preset timeout period.

Critical µP Power Monitoring

Intelligent Instruments

Battery-Powered Computers and Controllers

Automotive Systems

L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear

Technology Corporation. All other trademarks are the property of their respective owners.

Typical applicaTion

RESET Output Voltage

vs Supply Voltage

LT^®1086-5

= 25°C

≥ 7.5V

EXTERNAL PULL-UP = 10µA

= 0V

POWER TO

µP

OUT

BATT

CMOS RAM POWER

0.1µF

LTC690/LTC691

LTC694/LTC695

100µF

10µF

ADJ

µP

SYSTEM

BATT

µP RESET

µP NMI

RESET

PFO

51k

10k

I/O LINE

PFI

WDI

GND

690 TA01

0.1µF 100Ω

MICROPROCESSOR RESET, BATTERY BACK-UP, POWER FAILURE

WARNING AND WATCHDOG TIMING ARE ALL IN A SINGLE CHIP

FOR MICROPROCESSOR SYSTEMS

SUPPLY VOLTAGE (V)

690 TA02

690ff

For more information www.linear.com/690

12 3 4 5 6 7...20

中文翻译

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与LTC695相关器件

型号	品牌	获取价格	描述	数据表
LTC695_15	Linear	获取价格	Microprocessor Supervisory Circuits
LTC6951	ADI	获取价格	具集成型 VCO 的超低抖动、多输出时钟合成器
LTC6952	ADI	获取价格	具有 11 个输出并支持 JESD204B / JESD204C 协议的超低抖动、4.5G
LTC6953	ADI	获取价格	具有 11 个输出并支持 JESD204B/JESD204C 协议的超低抖动、4.5GHz
LTC695-3.3	Linear	获取价格	3.3V Microprocessor Supervisory Circuits
LTC695-3.3	ADI	获取价格	3.3V 微处理器监控电路
LTC695-3.3_15	Linear	获取价格	3.3V Microprocessor Supervisory Circuits
LTC695-3.3CSW	Linear	获取价格	IC 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDSO16, 0.300 INCH, PLASTIC, SOP-16, Power Manag
LTC6955	ADI	获取价格	超低抖动 7.5GHz 11 输出扇出缓冲器系列
LTC6957-1	Linear	获取价格	Low Phase Noise, Dual Output Buffer/Driver/Logic Converter

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