LTC690IS8PBF

更新时间： 2024-11-05 05:44:03

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
18页	217K
描述
Microprocessor Supervisory Circuits

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中文翻译

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数据手册

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LTC690IS8PBF 数据手册

LTC690/LTC691

LTC694/LTC695

Microprocessor

Supervisory Circuits

FEATURES

DESCRIPTION

The LTC^®690 family provides complete power supply

monitoringandbatterycontrolfunctionsformicroprocessor

reset,batteryback-up,CMOSRAMwriteprotection,power

failure warning and watchdog timing. A precise internal

voltagereferenceandcomparatorcircuitmonitorthepower

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

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

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

Voltage Monitor for Power-Fail

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.

or Low-Battery Warning

Thermal Limiting

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

= 25°C

LT^®1086-5

EXTERNAL PULL-UP = 10μA

= 0V

≥ 7.5V

BATT

POWER TO

μP

OUT

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

690fe

12 3 4 5 6 7...18

中文翻译

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与LTC690IS8PBF相关器件

型号	品牌	获取价格	描述	数据表
LTC690IS8-PBF	Linear	获取价格	Microprocessor Supervisory Circuits
LTC690M	Linear	获取价格	Microprocessor Supervisory Circuits
LTC690MJ8	Linear	获取价格	Microprocessor Supervisory Circuits
LTC690MJ8#PBF	Linear	获取价格	IC,POWER SUPPLY SUPERVISOR,CMOS,DIP,8PIN,CERAMIC
LTC691	Linear	获取价格	Microprocessor Supervisory Circuits
LTC691	ADI	获取价格	微处理器监控电路
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

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