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LM3700

National Semiconductor
Part Number LM3700
Manufacturer National Semiconductor
Description Microprocessor Supervisor
Published Mar 22, 2005
Detailed Description LM3700/LM3701 Microprocessor Supervisory Circuit with Low Line Output June 2002 LM3700/LM3701 Microprocessor Superviso...
Datasheet PDF File LM3700 PDF File

LM3700
LM3700


Overview
LM3700/LM3701 Microprocessor Supervisory Circuit with Low Line Output June 2002 LM3700/LM3701 Microprocessor Supervisory Circuit with Low Line Output General Description The LM3700/LM3701 series of microprocessor supervisory circuits provide the maximum flexibility for monitoring power supplies and battery controlled functions in systems without backup batteries.
The LM3700/LM3701 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.
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.
n n n n n n n No external components required RESET (LM3700) or RESET (LM3701) outputs Precision supply voltage monitor Factory programmable Reset Timeout Delay Available in micro SMD package for minimum footprint ± 0.
5% Reset threshold accuracy at room temperature ± 2% Reset threshold accuracy over temperature extremes n Reset assertion down to 1V VCC (RESET option only) n 28 µA VCC supply current Applications n n n n Embedded Controllers and Processors Intelligent Instruments Automotive Systems Critical µP Power Monitoring Features n Standard Reset Threshold voltage: 3.
08V n Custom Reset Threshold voltages: For other voltages between 2.
2V and 5.
0V in 10mV increments, contact National Semiconductor Corp.
Typical Application 20011403 © 2002 National Semiconductor Corporation DS200114 www.
national.
com LM3700/LM3701 Connection Diagram Top View (looking from the coating side) micro SMD 9 Bump Package BPA09 20011401 Pin Descriptions Bump No.
B1 C1 Name VCC RESET Power Supply input.
Reset Logic Output.
Pulses low for tRP (Reset Timeout Period) when triggered, and stays low whenever VCC is below the reset threshold or when MR is below VMRT.
It remains low for tRP after either VCC rises above the reset threshold, o...


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