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LM3708

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. : 004395433 Detail

LM3708: 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...

LM3708 Data Sheet

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Part Number:
LM3708
Supply Ability:
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

Power on Reset Yes
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 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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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)






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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