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Details, datasheet, quote on part number:LM3704XBMMX-232
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| Part: | LM3704XBMMX-232 |
| Category: | Power Management => Supervisory Circuits => System Supervisors/Reset => Supervisory Function |
| Description: | LM3704 - Microprocessor Supervisory Circuits With Power Fail Input, Low Line Output And Manual Reset, Package: Microsmd, Pin Nb=9 |
| Company: | National Semiconductor Corporation |
| Datasheet: | Download LM3704XBMMX-232 datasheet File size : 323 kB |
| Request For quote: | Find where to buy LM3704XBMMX-232
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Datasheet text preview:
LM3704/LM3705 Microprocessor Supervisory Circuits with Power Fail Input, Low Line Output and Manual Reset
July 2002
LM3704/LM3705 Microprocessor Supervisory Circuits with Power Fail Input, Low Line Output and Manual Reset
General Description
The LM3704/LM3705 series of microprocessor supervisory circuits provide the maximum flexibility for monitoring power supplies and battery controlled functions in systems without backup batteries. The LM3704/LM3705 series are available in MSOP-10 and 9-bump micro SMD packages. 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. Power-Fail Input: A 1.225V threshold detector for power fail warning, or to monitor a power supply other than VCC. 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 n n No external components required Manual-Reset input RESET (LM3704) or RESET (LM3705) outputs Precision supply voltage monitor Factory programmable Reset Timeout Delay Separate Power Fail comparator 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
10136903
© 2002 National Semiconductor Corporation
DS101369
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LM3704/LM3705
Connection Diagram
Top View (looking from the coating side) micro SMD 9 Bump Package BPA09
MSOP-10
10136902
10136901
Pin Description
Pin No. micro SMD A1 B1 C1 MSOP 2 1 10 Name MR VCC RESET Function Manual-Reset input. When MR is less than VMRT (Manual Reset Threshold) RESET/RESET is engaged. 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, or after MR input rises above VMRT (LM3704 only). Reset Logic Output. RESET is the inverse of RESET (LM3705 only). Power-Fail Logic Output. When PFI is below VPFT, PFO goes low; otherwise, PFO remains high. Low-Line Logic Output. Early Power-Fail warning output. Low when VCC falls below VLLOT (Low-Line Output Threshold). This output can be used to generate an NMI (Non-Maskable Interrupt) to provide an early warning of imminent power-failure. Ground reference for all signals. No Connect. Power-Fail Comparator Input. When PFI is less than VPFT (Power-Fail Reset Threshold), the PFO goes low; otherwise, PFO remains high. No Connect. Test input used at factory only. Leave floating.
RESET C2 C3 8 7 PFO LLO
B3 A3 A2 B2
5 4, 6 3 9
GND NC PFI NC
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2
LM3704/LM3705
Block Diagram
10136926
3
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