Datasheet > LTC692I

LTC692I

更新时间： 2024-11-30 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	309K
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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LTC692I 数据手册

LTC692/LTC693

Microprocessor

Supervisory Circuits

DESCRIPTIO

EATURE

■

UL Recognized

TheLTC692/LTC693providecompletepowersupplymoni-

toring and battery control functions for microprocessor

reset, batterybackup, CMOSRAMwriteprotection, 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,theresetoutputsareforcedtoactivestatesandthe

Chip Enable output unconditionally write-protects exter-

nal memory. In addition, the RESET output is guaranteed

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

Guaranteed Reset Assertion at V_CC= 1V

1.5mA Maximum Supply Current

Fast (35ns Max.) On-Board Gating of RAM Chip

Enable Signals

■

SO8 and SO16 Packaging

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

Thermal Limiting

Performance Specified Over Temperature

Superior Upgrade for MAX690 Family

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.

■

For an early warning of impending power failure, the

LTC692/LTC963 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

time-out period.

O U

PPLICATI

■

Critical µP Power Monitoring

Intelligent Instruments

Battery-Powered Computers and Controllers

Automotive Systems

TYPICAL APPLICATI

RESET Output Voltage vs

Supply Voltage

LT1086-5

T = 25°C

≥ 7.5V

EXTERNAL PULL-UP = 10µA

= 0V

POWER TO

µP

OUT

BATT

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

LTC692/3 • 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)

LTC692/3 • TA02

12 3 4 5 6 7...16

中文翻译

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与LTC692I相关器件

型号	品牌	获取价格	描述	数据表
LTC692IN8	Linear	获取价格	Microprocessor Supervisory Circuits
LTC692IS8	Linear	获取价格	Microprocessor Supervisory Circuits
LTC692IS8#PBF	Linear	获取价格	LTC692 - Microprocessor Supervisory Circuits; Package: SO; Pins: 8; Temperature Range: -40
LTC692IS8#TR	Linear	获取价格	LTC692 - Microprocessor Supervisory Circuits; Package: SO; Pins: 8; Temperature Range: -40
LTC692IS8#TRPBF	Linear	获取价格	LTC692 - Microprocessor Supervisory Circuits; Package: SO; Pins: 8; Temperature Range: -40
LTC692IS8-PBF	Linear	获取价格	Microprocessor Supervisory Circuits
LTC692IS8-TRPBF	Linear	获取价格	Microprocessor Supervisory Circuits
LTC693	Linear	获取价格	Microprocessor Supervisory Circuits
LTC693	ADI	获取价格	微处理器监控电路
LTC693_15	Linear	获取价格	Microprocessor Supervisory Circuits

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