LTC691

更新时间： 2024-11-04 22:51:47

品牌	Logo	应用领域
凌特 - Linear		微处理器监控
页数	文件大小	规格书
16页	144K
描述
Microprocessor Supervisory Circuits

阅读下载

中文翻译

获取价格

数据手册

如果您发现信息不准确，欢迎纠错

LTC691 数据手册

LTC690/ LTC691

LTC694/ LTC695

Mic ro p ro c e sso r

Sup e rviso ry Circ uits

FEATURES

DESCRIPTIO

The LTC^®690 family provides complete power supply

monitoringandbatterycontrolfunctions formicroproces-

sor reset, battery back-up, CMOS RAM write protection,

power failure warning and watchdog timing. A precise

internal voltage reference and comparator circuit monitor

thepowersupplyline. Whenanout-of-tolerancecondition

occurs,theresetoutputs areforcedtoactivestates andthe

chipenableoutputunconditionallywrite-protects external

memory. In addition, the RESET output is guaranteed to

■

UL Recognized

Guaranteed Reset Assertion at V = 1V

1.5mA Maximum Supply Current

Fast (35ns Max) Onboard Gating of RAM Chip

Enable Signals

File # E145770

■

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

or Low-Battery Warning

Thermal Limiting

Performance Specified Over Temperature

Superior Upgrade for MAX690 Family

remain logic low even with V as low as 1V.

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,

auxiliarypower,connectedtothebatteryinputpin,powers

the RAMs in standby through an efficient PMOS switch.

■

For an early warning of impending power failure, the

LTC690 family provides an internal comparator with a

user-definedthreshold. Aninternalwatchdogtimeris also

available, which forces the reset pins to active states when

thewatchdoginputis nottoggledpriortoapresettime-out

period.

APPLICATIO S

■

Critical µP Power Monitoring

Intelligent Instruments

Battery-Powered Computers and Controllers

Automotive Systems

■

, LTC and LT are registered trademarks of Linear Technology Corporation.

TYPICAL APPLICATIO

RESET Output Voltage vs

Supply Voltage

LT^®1086-5

= 25°C

≥ 7.5V

EXTERNAL PULL-UP = 10µA

= 0V

POWER TO

CMOS RAM POWER

µP

OUT

BATT

0.1µF

LTC690/LTC691

LTC694/LTC695

BATT

100µF

10µF

ADJ

µP

SYSTEM

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

12 3 4 5 6 7...16

中文翻译

下载PDF

与LTC691相关器件

型号	品牌	获取价格	描述	数据表
LTC691_15	Linear	获取价格	Microprocessor Supervisory Circuits
LTC6910-1	Linear	获取价格	Digitally Controlled Programmable Gain Amplifiers in SOT-23
LTC6910-1_15	Linear	获取价格	Digitally Controlled Programmable Gain Amplifiers in SOT-23
LTC6910-1CTS8	Linear	获取价格	Digitally Controlled Programmable Gain Amplifiers in SOT-23
LTC6910-1CTS8#TR	Linear	获取价格	LTC6910 - Digitally Controlled Programmable Gain Amplifiers in SOT-23; Package: SOT; Pins:
LTC6910-1CTS8#TRM	Linear	获取价格	LTC6910 - Digitally Controlled Programmable Gain Amplifiers in SOT-23; Package: SOT; Pins:
LTC6910-1CTS8#TRMPBF	Linear	获取价格	LTC6910 - Digitally Controlled Programmable Gain Amplifiers in SOT-23; Package: SOT; Pins:
LTC6910-1HTS8	Linear	获取价格	Digitally Controlled Programmable Gain Amplifiers in SOT-23
LTC6910-1HTS8#PBF	Linear	获取价格	LTC6910 - Digitally Controlled Programmable Gain Amplifiers in SOT-23; Package: SOT; Pins:
LTC6910-1HTS8#TR	Linear	获取价格	LTC6910 - Digitally Controlled Programmable Gain Amplifiers in SOT-23; Package: SOT; Pins:

与LTC691相关文章

英伟达新AI芯片Rubin或提前半年亮相
2024-11-05

14
苹果iPhone 17将全系采用三星/LG显示LTPO OLED面板
2024-11-05

12
三星深化印度制造布局，供应链本地化进程加速
2024-10-29

36
芯擎科技“星辰一号”自动驾驶芯片点亮成功，2025年量产在即
2024-10-29

33

产品中心

服务支持

精选活动

关于我们

帮助中心

LTC691

LTC691 数据手册

与LTC691相关器件

与LTC691相关文章

您还可以找

产品中心

服务支持

精选活动

关于我们

帮助中心

LTC691

LTC691 数据手册

与LTC691相关器件

与LTC691相关文章

您还可以找

您在本页遇到什么问题？