参数资料
型号: LM3723I3.08MWC
厂商: NATIONAL SEMICONDUCTOR CORP
元件分类: 电源管理
英文描述: 1-CHANNEL POWER SUPPLY SUPPORT CKT, UUC
封装: WAFER
文件页数: 11/24页
文件大小: 398K
代理商: LM3723I3.08MWC
National P/N LM3722 - 5-Pin Microprocessor Reset Circuits
LM3722E4.63 MWC
Full production
N/A
wafer jar
of
N/A
-
LM3722I2.32 MWC
Full production
N/A
wafer jar
of
N/A
-
LM3722I3.08 MWC
Full production
N/A
wafer jar
of
N/A
-
LM3722I4.63 MWC
Full production
N/A
wafer jar
of
N/A
-
General Description
The LM3722/LM3723/LM3724 microprocessor supervisory circuits monitor the power supplies in
microprocessor and digital systems. They provide a reset to the microprocessor during power-up, power-
down, brown-out conditions, and manual reset.
The LM3722/LM3723/LM3724 asserts a reset signal whenever the supply decreases below the factory-
programmed reset threshold for at least 100 ms. The reset signal remains asserted for 190 ms after VCC
rises above the threshold.
The LM3722 has an active-low RESET# push-pull output. The LM3723 has an active-high RESET push-pull
output. The LM3724 has an active-low open-drain RESET# output.
Three standard reset voltage options are available, suitable for monitoring 5V, 3.3V, and 2.5V supply
voltages. Additional reset voltages are also available; contact National Semiconductor for details.
With a low supply current of only 6A, the LM3722/LM3723/LM3724 are ideal for use in portable equipment.
The LM3722/LM3723/LM3724 are available in the 5-pin SOT23 package.
Features
q
Precise monitoring of 2.5V, 3.3V, and 5V supply voltages
q
Fully specified over temperature Industrial: -40°C to +85°C Extended: -40°C to +125°C
q
100 ms minimum Power-On Reset pulse width, 190 ms typical: Active-Low RESET# Output (LM3722)
Active-High RESET Output (LM3723) Active-Low RESET# Open Drain Output (LM3724)
q
Guaranteed RESET# Output valid for VCC >= 1V
q
Low Supply Current, 6A typical
q
Power supply transient immunity
q
Compatible with MAX811/812 applications
Applications
q
Microprocessor Systems
q
Computers
q
Controllers
q
Intelligent Instruments
q
Portable/Battery-Powered Equipment
[Information as of 5-Aug-2002]
file:///H|/imaging/BITTING/cpl/20020808_1/08062002_10/NATL/08062002_HTML/LM3722.html (3 of 4) [09-Aug-2002 2:21:57 PM]
相关PDF资料
PDF描述
LM3723E4.63MDC 1-CHANNEL POWER SUPPLY SUPPORT CKT, UUC
LM3724E3.08MDC 1-CHANNEL POWER SUPPLY SUPPORT CKT, UUC
LM3724E4.63MDC 1-CHANNEL POWER SUPPLY SUPPORT CKT, UUC
LM3722I2.32MWC 1-CHANNEL POWER SUPPLY SUPPORT CKT, UUC
LM3724I4.63MWC 1-CHANNEL POWER SUPPLY SUPPORT CKT, UUC
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