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参数资料
| 型号： | LM809-4.00MDC |
| 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： | DIE |
| 文件页数： | 7/16页 |
| 文件大小： | 281K |
| 代理商： | LM809-4.00MDC |
LM809-2.63 MWC
Full production
N/A
wafer jar
of
N/A
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LM809-2.93 MWC
Full production
N/A
wafer jar
of
N/A
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LM809-3.08 MWC
Full production
N/A
wafer jar
of
N/A
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LM809-4.00 MWC
Full production
N/A
wafer jar
of
N/A
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LM809-4.38 MWC
Full production
N/A
wafer jar
of
N/A
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LM809-4.63 MWC
Full production
N/A
wafer jar
of
N/A
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General Description
The LM809/810 microprocessor supervisory circuits can be used to monitor the power supplies in microprocessor and
digital systems. They provide a reset to the microprocessor during power-up, power-down and brown-out conditions.
The function of the LM809/810 is to monitor the VCC supply voltage, and assert a reset signal whenever this voltage
declines below the factory-programmed reset threshold. The reset signal remains asserted for 240ms after VCC rises
above the threshold. The LM809 has an active-low RESET# output, while the LM810 has an active-high RESET
output.
Seven standard reset voltage options are available, suitable for monitoring 5V, 3.3V, and 3V supply voltages.
With a low supply current of only 15A, the LM809/810 are ideal for use in portable equipment. The LM809/LM810
are available in the 3-pin SOT23 package.
Features
Precise monitoring of 3V, 3.3V, and 5V supply voltages
q
Superior upgrade to MAX809/810
q
Fully specified over temperature
q
140ms min. Power-On Reset pulse width, 240ms typical Active-low RESET# Output (LM809) Active-high
RESET Output (LM810)
q
Guaranteed RESET Output valid for VCC>=1V
q
Low Supply Current, 15A typ.
q
Power supply transient immunity
q
Applications
Microprocessor Systems
q
Computers
q
Controllers
q
Intelligent Instruments
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Portable/Battery-Powered Equipment
q
Automotive
q
National P/N LM809 - 3-Pin Microprocessor Reset Circuits
file:///G|/imaging/BITTING/cpl_IMAGES/LM809.htm (4 of 5) [Aug-27-2002 6:13:26 PM]
相关PDF资料 |
PDF描述 |
|---|---|
| LM810-2.63MWC | 1-CHANNEL POWER SUPPLY SUPPORT CKT, UUC |
| LM810-3.08MWC | 1-CHANNEL POWER SUPPLY SUPPORT CKT, UUC |
| LM809-4.63MWC | 1-CHANNEL POWER SUPPLY SUPPORT CKT, UUC |
| LM810-4.63MWC | 1-CHANNEL POWER SUPPLY SUPPORT CKT, UUC |
| LM809-4.63MDC | 1-CHANNEL POWER SUPPLY SUPPORT CKT, UUC |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LM809A-2.45 E WAF | 制造商:Texas Instruments 功能描述: |
| LM809A-4.00 E WAF | 制造商:Texas Instruments 功能描述: |
| LM809A-4.38 E WAF | 制造商:Texas Instruments 功能描述: |
| LM809LD-2.63 | 制造商:NSC 制造商全称:National Semiconductor 功能描述:3-Pin Microprocessor Reset Circuits |
| LM809LDX-2.63 | 制造商:NSC 制造商全称:National Semiconductor 功能描述:3-Pin Microprocessor Reset Circuits |
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