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LM3709

Features: ` Standard Reset Threshold voltage: 3.08V` Custom Reset Threshold voltages: For other voltages between 2.2V and 5.0V in 10mV increments, contact National Semiconductor Corp.` No external components required` Manual-Reset input` RESET (LM3708) or RESET (LM3709) outputs` Precision supply v...

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SeekIC No. : 004395434 Detail

LM3709: Features: ` Standard Reset Threshold voltage: 3.08V` Custom Reset Threshold voltages: For other voltages between 2.2V and 5.0V in 10mV increments, contact National Semiconductor Corp.` No external c...

LM3709 Data Sheet

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Part Number:
LM3709
Supply Ability:
5000

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

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Product Details

Description



Features:

` Standard Reset Threshold voltage: 3.08V
` Custom Reset Threshold voltages: For other voltages between 2.2V and 5.0V in 10mV increments, contact National Semiconductor Corp.
` No external components required
` Manual-Reset input
` RESET (LM3708) or RESET (LM3709) outputs
` Precision supply voltage monitor
` Factory programmable Reset and Watchdog Timeout Delays
` Available in micro SMD package for minimum footprint
` ±0.5% Reset threshold accuracy at room temperature
` ±2% Reset threshold accuracy over temperature extremes
` Reset assertion down to 1V VCC (RESET option only)
` 28 A VCC supply current




Application

` Embedded Controllers and Processors
` Intelligent Instruments
` Automotive Systems
` Critical P Power Monitoring




Specifications

Supply Voltage (VCC) ....−0.3V to 6.0V
All Other Inputs .. −0.3V to VCC + 0.3V
ESD Ratings (Note 2)
Human Body Model.......... 1.5kV
Machine Model..............150V
Power Dissipation ......... (Note 3)



Power on Reset No
Watchdog Yes
Power Fail Input No
Manual Reset Yes
Reset Timeout Period 200 ms
On/Off Pin Yes
Error Flag Yes
Input Min Voltage 1.2 Volt
Input Max Voltage 5.5 Volt
RegType Supervisor
Temperature Min -40 deg C
Temperature Max 85 deg C
Voltage Supervised 3.3 Volt
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Description

The LM3708/LM3709 series of microprocessor supervisory circuits provide the maximum flexibility for monitoring power
supplies and battery controlled functions in systems without backup batteries. The LM3708/LM3709 series are available in a 9-bump micro SMD package. Built-in features include the following:

Reset: Reset is asserted during power-up, power-down, and brownout conditions. RESET is guaranteed down to VCC of 1.0V.

Manual Reset Input: An input that asserts reset when pulled low.

Low Line Output: This early power failure warning indicator goes low when the supply voltage drops to a value which is 2% higher than the reset threshold voltage.

Watchdog Timer: The WDI (Watchdog Input) monitors one of the P's output lines for activity. If no output transition occurs during the watchdog timeout period, reset is activated.






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