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US5781
Unipolar Hall Switch - Medium Sensitivity
Description
Applications
Documents
Environmental
FAQ
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Download US5781 Datasheet (PDF)
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US5781 General Description
The Melexis US5781 is a unipolar Hall-effect switch designed in mixed signal CMOS technology.
The device integrates a voltage regulator, Hall sensor with dynamic offset cancellation system, Schmitt trigger and an open-drain output driver, all in a single package.
Thanks to its wide operating voltage range and extended choice of temperature range, it is suitable for use in automotive and solid state switch applications.
The device is delivered in a Thin Small Outline Transistor (TSOT) for surface mount process and in a Plastic Single In Line (TO-92 flat) for through-hole mount.
Both 3-lead packages are RoHS compliant.
US5781 Features and Benefits
Wide operating voltage range from 3.5V to 24V
Medium sensitivity
CMOS technology
Chopper-stabilized amplifier stage
Low current consumption
Open drain output
Thin SOT23 3L and flat TO-92 3L both RoHS Compliant packages
SE package North Pole Active
UA package South Pole Active
US5781 Applications
Seat position motor
Switches
Wiper Systems
Speed sensing
Magnetic Interrupt Switch
Flow Meter
Application Note
File Type
Size
Revision
Date
Action
Hall Applications Guide
PDF
498.0 KB
10/25/2005
Soldering Application Note and Recommendations
PDF
137.7 KB
2.1
2/3/2009
Trim and form recommendations
PDF
127.1 KB
3.11
4/13/2009
US5781 Documentation
DataSheet
File Type
Size
Revision
Date
Action
MLX92211 DataSheet
PDF
768.4 KB
2
9/19/2011
US5781 DataSheet
PDF
428.5 KB
013
12/12/2006
How It Works
File Type
Size
Revision
Date
Action
The Hall Effect Switch
SWF
11.9 KB
002
2/23/2007
Virtual Hall Effect Demoboard
SWF
164.0 KB
12/9/2002
What is the Hall Effect?
SWF
16.8 KB
1
3/15/2007
Reference
File Type
Size
Revision
Date
Action
BLDC Fan Motor Driver Quick Reference
PDF
1.7 MB
004
10/4/2011
Hall Effect Latch and Switch Quick Reference
PDF
669.1 KB
006
4/6/2012
US5781 Tools
US5781 Environmental Information
Environmental Information
File Type
Size
Revision
Date
Action
Green / Halogen Free Compliance Declaration US5781
PDF
39.7 KB
1.0
10/7/2009
Package Material Declaration - TSOT3 GR - S1
PDF
105.1 KB
7.0
1/25/2012
Package Material Declaration - UA GR - S3
PDF
97.2 KB
7.0
1/25/2012
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US5781 In The Press
US5781 Frequently asked Questions
HAL506UA-A
Answer
Hi Major,
US5781LUA and also US5782LUA are the alternatives. They both have a temp spec of -40° to 150°C. Why do you think the temp spec does not comply?
Kind regards,
Tanguy
US5781-L Hall Cells
Question
From looking at the datasheet for the US5781-L-(UA/SE), the actual "Hall Cell" inside the chip appears to be a different size depending on if the chip is the through-hole or surface mount version(may not be drawn to scale). If so, does this affect its sensitivity?
Answer
The Hall element of the US5781 is the same size in UA and SE package. As you correctly concluded the drawings are not to scale.
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