Datasheet > LTC695-3.3

LTC695-3.3

更新时间： 2024-11-16 14:57:43

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	194K
描述
3.3V 微处理器监控电路

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LTC695-3.3 数据手册

LTC694-3.3/LTC695-3.3

3.3V Microprocessor

Supervisory Circuits

FEATURES

DESCRIPTION

TheLTC^®694-3.3/LTC695-3.3providecomplete3.3Vpower

supply monitoring and battery control functions. These

include power-on reset, battery back-up, RAM write pro-

tection, power failure warning and watchdog timing. The

devicesarepincompatibleupgradesoftheLTC694/LTC695

that are optimized for 3.3V systems. Operating power

consumption has been reduced to 0.6mW (typical) and

3μW maximum in battery back-up mode. Microprocessor

reset and memory write protection are provided when the

supply falls below 2.9V. The RESET output is guaranteed

Guaranteed Reset Assertion at V = 1V

Pin Compatible with LTC694/LTC695 for 3.3V Systems

200μA Typical Supply Current

Fast (30ns Typ) Onboard Gating of

RAM Chip Enable Signals

SO-8 and S16 Packages

2.90V 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

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

Low-Battery Warning

Thermal Limiting

The LTC694-3.3/LTC695-3.3 power the active RAMs with

a charge pumped NMOS power switch to achieve low

dropout 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

APPLICATIONS

3.3V Low Power Systems

For an early warning of impending power failure, the

LTC694-3.3/LTC695-3.3 provide an internal comparator

with a user-defined threshold. An internal watchdog timer

isalsoavailable,whichforcestheresetpinstoactivestates

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

LT1129-3.3

≥ 5V

3.3V

POWER TO

μP

OUT

CMOS RAM POWER

0.1μF

100μF

0.1μF

2.4V

1μF

OUT SENSE

SHDN

GND

LTC695-3.3

μP

SYSTEM

DECODER OUTPUT

RAM CS

μP RESET

μP NMI

CE IN

BATT

CE OUT

RESET

PFO

51k

18k

PFI

WDI

I/O LINE

GND

MICROPROCESSOR RESET, BATTERY BACK-UP,

100Ω

RAM WRITE PROTECTION, POWER WARNING AND

WATCHDOG TIMING ARE ALL IN A SINGLE CHIP

FOR 3.3V MICROPROCESSOR SYSTEM

0.1μF

694/5-3.3 TA01

SUPPLY VOLTAGE (V)

694/5-3.3 TA02

69453fb

12 3 4 5 6 7...20

中文翻译

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与LTC695-3.3相关器件

型号	品牌	获取价格	描述	数据表
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
LTC6957-1	ADI	获取价格	Low Phase Noise, Dual Output Logic Converter
LTC6957-1_15	Linear	获取价格	Low Phase Noise, Dual Output Buffer/Driver/ Logic Converter
LTC6957-2	ADI	获取价格	Low Phase Noise, Dual Output Logic Converter
LTC6957-2	Linear	获取价格	280MHz, 2.9ns Comparator Family with Rail-to-Rail Inputs and CMOS Outputs
LTC6957-2_15	Linear	获取价格	Low Phase Noise, Dual Output Buffer/Driver/ Logic Converter
LTC6957-3	ADI	获取价格	Low Phase Noise, Dual Output Logic Converter

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