LMV7231SQX/NOPB National Semiconductor, LMV7231SQX/NOPB Datasheet

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LMV7231SQX/NOPB

Manufacturer Part Number
LMV7231SQX/NOPB
Description
IC COMP HEX WINDOW W/REF 24-LLP
Manufacturer
National Semiconductor
Type
Windowr
Datasheet

Specifications of LMV7231SQX/NOPB

Number Of Elements
6
Output Type
NMOS, Open-Drain
Voltage - Supply
2.2 V ~ 5.5 V
Mounting Type
Surface Mount
Package / Case
24-LLP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
© 2010 National Semiconductor Corporation
Hex Window Comparator with 1.5% Precision and 400mV
Reference
General Description
The LMV7231 is a 1.5% accurate Hex Window Comparator
which can be used to monitor power supply voltages. The
device uses an internal 400mV reference for the comparator
trip value. The comparator set points can be set via external
resistor dividers. The LMV7231 has 6 outputs (CO1-CO6)
that signal an under-voltage or over-voltage event for each
power supply input. An output (AO) is also provided to signal
when any of the power supply inputs have an over-voltage or
under-voltage event. This ability to signal an under-voltage or
over-voltage event for the individual power supply inputs, in
addition to an output to signal such an event on any of the
power supply inputs adds unparalleled system protection ca-
pability.
The LMV7231’s +2.2V to +5.5V power supply voltage range,
low supply current, and input/output voltage range above V+
make it ideal for a wide range of power supply monitoring ap-
plications. Operation is guaranteed over the -40°C to +125°C
temperature range. The device is available in a 24-pin LLP
package.
301149
LMV7231
Features
(For V
Applications
High accuracy voltage reference: 400 mV
Threshold Accuracy: ±1.5% (max)
Wide supply voltage range +2.2V to +5.5V
Input/Output voltage range above V+
Internal hysteresis: 6mV
Propagation delay: 2.6 µs to 5.6 µs
Supply Current 7.7 µA per channel
24 lead LLP package
Temperature range: -40°C to 125°C
Power Supply Voltage Detection
Battery Monitoring
Handheld Instruments
Relay Driving
Industrial Control Systems
S
= 3.3V ±10%, Typical unless otherwise noted)
December 16, 2010
www.national.com

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LMV7231SQX/NOPB Summary of contents

Page 1

... V+ make it ideal for a wide range of power supply monitoring ap- plications. Operation is guaranteed over the -40°C to +125°C temperature range. The device is available in a 24-pin LLP package. © 2010 National Semiconductor Corporation LMV7231 Features (For V = 3.3V ±10%, Typical unless otherwise noted) S ■ ...

Page 2

Typical Application Circuit www.national.com 2 30114944 ...

Page 3

... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. ESD Tolerance (Note 2) Human Body Model Machine Model Supply Voltage Voltage at Input/Output Pin Output Current Total Package Current Storage Temp Range +3.3V Electrical Characteristics ± ...

Page 4

Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is intended to be functional, but specific performance is not guaranteed. For guaranteed specifications and the test ...

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Pin Descriptions Pin Symbol 1 -IN1 2 +IN1 3 -IN2 4 +IN2 5 -IN3 6 +IN3 7 -IN4 8 +IN4 9 -IN5 10 +IN5 11 -IN6 12 +IN6 13 RESERVED 14 GND 15 COPOL 16 AOSEL CO6 ...

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Block Diagram www.national.com 6 30114943 ...

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Typical Performance Characteristics +In Input Rising Threshold Distribution +In Input Falling Threshold Distribution +In Hysteresis Distribution 3.3V and T =25°C unless otherwise noted. A −In Input Rising Threshold Distribution 30114976 −In Input Falling Threshold Distribution 30114977 −In ...

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Input Rising Threshold Voltage vs. Temperature Input Falling Threshold Voltage vs. Temperature Hysteresis vs. Temperature www.national.com Input Rising Threshold Voltage vs. Supply Voltage 30114946 Input Falling Threshold Voltage vs. Supply Voltage 30114948 Hysteresis vs. Supply Voltage 30114950 8 30114947 30114949 ...

Page 9

Supply Current vs. Supply Voltage and Temperature Supply Current vs. Output Sink Current Supply Current vs. Output Sink Current Supply Current vs. Output Sink Current 30114952 Supply Current vs. Output Sink Current 30114972 Bias Current vs. Input Voltage 30114974 9 ...

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Bias Current vs. Input Voltage Output Voltage Low vs. Output Sink Current Output Voltage Low vs. Output Sink Current www.national.com Bias Current vs. Input Voltage 30114962 Output Voltage Low vs. Output Sink Current 30114964 Output Voltage Low vs. Output Sink ...

Page 11

Output Short Circuit Current vs. Output Voltage Propagation Delay vs. Input Overdrive Propagation Delay Output Short Circuit Current vs. Output Voltage 30114968 Rise and Fall Times vs. Output Pull-Up Resistor 30114960 Output Leakage Current vs. Output Voltage 30114975 11 30114969 ...

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Output Leakage Current vs. Output Voltage www.national.com 30114985 12 ...

Page 13

Application Information 3 RESISTOR VOLTAGE DIVIDER SELECTION The LMV7231 trip points can be set by external resistor di- viders as shown in Figure 1 Each trip point, over-voltage and under-voltage can be optimized for a falling ...

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FIGURE 2. Exiting the Voltage Detection Window FIGURE 3. Entering the Voltage Detection Window www.national.com 30114954 FIGURE 4. Rising Into and Out Of the Voltage Detection 30114955 FIGURE 5. Falling Into and Out Of the Voltage Detection 14 30114956 Window ...

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INPUT/OUTPUT VOLTAGE RANGE ABOVE V+ The LMV7231 Hex Window Comparator with 1.5% precision can accurately monitor power rails or batteries at one time. The input and output voltages of the device can exceed the supply voltage, V+, ...

Page 16

FIGURE 8. Power Supply Supervision 16 30114944 ...

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Physical Dimensions inches (millimeters) unless otherwise noted 24-Pin LLP Package NS Package Number SQA24A 17 www.national.com ...

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