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LM809

Features: `Precise monitoring of 3V, 3.3V, and 5V supply voltages`Superior upgrade to MAX809/810`Fully specified over temperature` 140ms min. Power-On Reset pulse width, 240ms typicalActive-low RESET Output (LM809)Active-high RESET Output (LM810)`Guaranteed RESET Output valid for VCC1V` Low Supply...

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SeekIC No. : 004396210 Detail

LM809: Features: `Precise monitoring of 3V, 3.3V, and 5V supply voltages`Superior upgrade to MAX809/810`Fully specified over temperature` 140ms min. Power-On Reset pulse width, 240ms typicalActive-low RESE...

LM809 Data Sheet

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Part Number:
LM809
Supply Ability:
5000

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  • 1~5000
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  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Product Details

Description



Features:

`Precise monitoring of 3V, 3.3V, and 5V supply voltages
`Superior upgrade to MAX809/810
`Fully specified over temperature
` 140ms min. Power-On Reset pulse width, 240ms typical
Active-low RESET Output (LM809)
Active-high RESET Output (LM810)
`Guaranteed RESET Output valid for VCC1V
` Low Supply Current, 15µA typ.
` Power supply transient immunity




Application

·Microprocessor Systems
· Computers
· Controllers
· Intelligent Instruments
·Portable/Battery-Powered Equipment
· Automotive




Specifications

VCC ..........................................................................................−0.3V to 6.0V
RESET, RESET ................................................................−0.3V to (VCC+ 0.3V)
Input Current, VCC Pin ..........................................................................20mA
Output Current, RESET, RESET
Pin ........................................................................................................20mA
Rate of Rise, VCC ..............................................................................100V/µs
ESD Rating (Note 2) ................................................................................2kV
Continuous Power Dissipation
(Note 4) ............................................................................................320mW
JA:
LLP-6 .............................................................................................152°C/W
SOT23-3 ........................................................................................326°C/W
Ambient Temperature Range ..........................................−40°C to +105°C
Maximum Junction Temperature ........................................................125°C
Storage Temperature Range ..........................................−65°C to +160°C
Lead Temperature (soldering,
10sec) .............................................................................................+300°C

Power on Reset Yes
Watchdog No
Power Fail Input No
Manual Reset No
Reset Timeout Period 240 ms
On/Off Pin No
Error Flag Yes
Input Max Voltage 6 Volt
RegType Supervisor
Temperature Min -40 deg C
Temperature Max 105 deg C
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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 15µA, the LM809/810 are ideal for use in portable equipment.

The LM809/LM810 are available in the 3-pin SOT23 package and in the 6-Lead LLP package.






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