LM3704XBBP-232 National Semiconductor, LM3704XBBP-232 Datasheet

IC MPU SUPERVISR 2.32V 9MICROSMD

LM3704XBBP-232

Manufacturer Part Number
LM3704XBBP-232
Description
IC MPU SUPERVISR 2.32V 9MICROSMD
Manufacturer
National Semiconductor
Type
Simple Reset/Power-On Resetr
Datasheet
1.LM3704XCMM-308NOPB.pdf (18 pages)

Specifications of LM3704XBBP-232

Number Of Voltages Monitored
1
Output
Push-Pull, Totem Pole
Reset
Active Low
Reset Timeout
20 ms Minimum
Voltage - Threshold
2.32V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
9-MicroSMD
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
LM3704XBBP-232TR
© 2003 National Semiconductor Corporation
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 V
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 V
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.
Features
n Standard Reset Threshold voltage: 3.08V
n Custom Reset Threshold voltages: For other voltages
Typical Application
between 2.2V and 5.0V in 10mV increments, contact
National Semiconductor Corp.
DS101369
CC
.
CC
of
n No external components required
n Manual-Reset input
n RESET (LM3704) or RESET (LM3705) outputs
n Precision supply voltage monitor
n Factory programmable Reset Timeout Delay
n Separate Power Fail comparator
n Available in micro SMD package for minimum footprint
n
n
n Reset assertion down to 1V V
n 28 µA V
Applications
n Embedded Controllers and Processors
n Intelligent Instruments
n Automotive Systems
n Critical µP Power Monitoring
extremes
±
±
0.5% Reset threshold accuracy at room temperature
2% Reset threshold accuracy over temperature
CC
supply current
10136903
CC
(RESET option only)
September 2003
www.national.com

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LM3704XBBP-232 Summary of contents

Page 1

... 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 © 2003 National Semiconductor Corporation n No external components required n Manual-Reset input n RESET (LM3704) or RESET (LM3705) outputs n Precision supply voltage monitor ...

Page 2

Connection Diagram MSOP-10 Pin Description Pin No. Name micro MSOP SMD RESET RESET C2 8 PFO C3 7 LLO B3 5 GND PFI B2 9 ...

Page 3

Block Diagram 3 10136926 www.national.com ...

Page 4

... Ordering Information *For other voltages between 2.2V and 5.0V, please contact National Semiconductor sales office. Part Number LM3704XBBP-232 LM3704XBBPX-232 LM3704XBBP-463 LM3704XBBPX-463 LM3704XBMM-232 LM3704XBMMX-232 LM3704XBMM-463 LM3704XBMMX-463 LM3704XCBP-308 LM3704XCBPX-308 LM3704XCMM-263 LM3704XCMMX-263 LM3704XCMM-308 LM3704XCMMX-308 LM3704XDBP-232 LM3704XDBPX-232 LM3704XDBP-463 LM3704XDBPX-463 LM3704XDMM-220 LM3704XDMMX-220 LM3704XDMM-232 LM3704XDMMx-232 LM3704XDMM-463 LM3704XDMMX-463 ...

Page 5

Ordering Information (Continued) Part Number LM3704YBMM-360 LM3704YBMMX-360 LM3704YCMM-232 LM3704YCMMX-232 LM3704YCMM-308 LM3704YCMMX-308 LM3705XBBP-232 LM3705XBBPX-232 LM3705XBBP-463 LM3705XBBPX-463 LM3705XBMM-232 LM3705XBMMX-232 LM3705XBMM-463 LM3705XBMMX-463 LM3705XCBP-463 LM3705XCBPX-463 LM3705XCMM-308 LM3705XCMMX-308 LM3705XDBP-232 LM3705XDBPX-232 LM3705XDBP-463 LM3705XDBPX-463 LM3705XDMM-232 LM3705XDMMX-232 LM3705XDMM-463 LM3705XDMMX-463 %% is the datecode and will vary with time. ...

Page 6

... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage ( All Other Inputs ESD Ratings (Note 2) Human Body Model Machine Model LM3704/LM3705 Series Electrical Characteristics Limits in the standard typeface are for T specified ...

Page 7

LM3704/LM3705 Series Electrical Characteristics Limits in the standard typeface are for T specified +2.2V to 5.5V. CC Symbol Parameter PFI/MR V PFI Input PFT Threshold V MR Input MR, Low MRT Threshold MR, High V / PFI/MR Threshold ...

Page 8

Typical Performance Characteristics Supply Current vs Supply Voltage Normalized Reset Threshold Voltage vs Temperature Reset Timeout Period vs Temperature www.national.com 3.3V Supply Current vs Temperature 10136915 Reset Timeout Period vs V 10136912 Max. Transient Duration vs Reset Comparator Overdrive 10136910 ...

Page 9

Typical Performance Characteristics Low-Line Comparator Propagation Delay vs Temperature (Continued) 10136914 9 www.national.com ...

Page 10

... MICRO SMD MOUNTING . Use MR MRT The micro SMD package requires specific mounting tech- niques which are detailed in National Semiconductor Appli- cation Note AN-1112. Referring to the section Surface Mount Technology (SMT) Assembly Considerations, it should be noted that the pad style which must be used with the 9-pin package is the NSMD (non-solder mask defined) ...

Page 11

Timing Diagrams FIGURE 1. LM3704 Reset Time with MR FIGURE 2. LLO Output FIGURE 3. PFI Comparator Timing Diagram 11 10136928 10136929 10136930 www.national.com ...

Page 12

Typical Application Circuits FIGURE 5. Monitoring Two Supplies plus Manual Reset www.national.com FIGURE 4. Monitoring Two Critical Supplies 12 10136918 10136919 ...

Page 13

Typical Application Circuits FIGURE 6. Monitoring Dual Supplies plus External Fault Input Note: MR input with its 1.225V nominal threshold, may monitor an additional supply voltage. An internal 56 kΩ pull-up resistor is included on this input. FIGURE 7. Microprocessor ...

Page 14

Typical Application Circuits www.national.com (Continued) FIGURE 8. LM3705 Power-On Delay 14 10136924 ...

Page 15

Typical Application Circuits FIGURE 9. LM3705 Power-On Delay with Overvoltage Protection (Continued) 15 10136923 www.national.com ...

Page 16

Typical Application Circuits FIGURE 10. Regulator/Switch with Long-Term Overvoltage Lockout Prevents Overdissipation in Linear Regulator www.national.com (Continued) FIGURE 11. Switch Debouncer 16 10136922 10136931 ...

Page 17

Physical Dimensions inches (millimeters) unless otherwise noted 10 Lead MSOP Package NS Package Number MUB10A 17 www.national.com ...

Page 18

... NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant ...

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