Datasheet > LTC693

LTC693

更新时间： 2024-12-02 14:57:23

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	249K
描述
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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LTC693 数据手册

LTC692/LTC693

Microprocessor

Supervisory Circuits

FEATURES

DESCRIPTION

The LTC^®692/LTC693 provide complete power supply

monitoringandbatterycontrolfunctionsformicroproces-

sor reset, battery backup, CMOS RAM write protection,

power failure warning and watchdog timing. A precise

internal voltage reference and comparator circuit monitor

thepowersupplyline. Whenanout-of-tolerancecondition

occurs,theresetoutputsareforcedtoactivestatesandthe

chipenableoutputunconditionallywrite-protectsexternal

memory. In addition, the RESET output is guaranteed to

Guaranteed Reset Assertion at V = 1V

1.5mA Maximum Supply Current

Fast (35ns Maximum) Onboard Gating of RAM Chip

Enable Signals

4.40V Precision Voltage Monitor

Power OK/Reset Time Delay: 200ms or Adjustable

Minimum External Component Count

1μA Maximum Standby Current

Voltage Monitor for Power-Fail or Low Battery

Warning

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

Thermal Limiting

The LTC692/LTC693 power 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.

Performance Speciﬁed Over Temperature

Superior Upgrade for MAX690 Family

SO8 and SO16 Packaging

APPLICATIONS

For an early warning of impending power failure, the

LTC692/LTC693 provide an internal comparator with a

user-deﬁned threshold. An internal watchdog timer is

also available, 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

EXTERNAL PULL-UP = 10μA

= 0V

LT1086-5

≥ 7.5V

BATT

POWER TO

μP

OUT

CMOS RAM POWER

0.1μF

LTC692

LTC693

100μF

10μF

ADJ

μP

SYSTEM

BATT

μP RESET

μP NMI

RESET

PFO

51k

10k

I/O LINE

PFI

WDI

GND

692_3 • TA01

0.1μF

100Ω

MICROPROCESSOR RESET, BATTERY BACKUP, POWER FAILURE

WARNING AND WATCHDOG TIMING ARE ALL IN A SINGLE CHIP

FOR MICROPROCESSOR SYSTEMS

SUPPLY VOLTAGE (V)

692_3 • TA02

0692fb

12 3 4 5 6 7...20

中文翻译

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与LTC693相关器件

型号	品牌	获取价格	描述	数据表
LTC693_15	Linear	获取价格	Microprocessor Supervisory Circuits
LTC6930	Linear	获取价格	32.768kHz to 8.192MHz Precision μPower Oscill
LTC6930CDCB-4.19-TRMPBF	Linear	获取价格	32.768kHz to 8.192MHz Precision μPower Oscill
LTC6930CDCB-4.19-TRPBF	Linear	获取价格	32.768kHz to 8.192MHz Precision μPower Oscill
LTC6930CDCB-5.00-TRMPBF	Linear	获取价格	32.768kHz to 8.192MHz Precision μPower Oscill
LTC6930CDCB-5.00-TRPBF	Linear	获取价格	32.768kHz to 8.192MHz Precision μPower Oscill
LTC6930CDCB-7.37-TRMPBF	Linear	获取价格	32.768kHz to 8.192MHz Precision μPower Oscill
LTC6930CDCB-7.37-TRPBF	Linear	获取价格	32.768kHz to 8.192MHz Precision μPower Oscill
LTC6930CDCB-8.00-TRMPBF	Linear	获取价格	32.768kHz to 8.192MHz Precision μPower Oscill
LTC6930CDCB-8.00-TRPBF	Linear	获取价格	32.768kHz to 8.192MHz Precision μPower Oscill

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