US5881
Unipolar Hall Switch
Low Sensitivity
Page 1 of 11
REVISION 009 – JAN 17, 2018
3901005881
Features and Benefits
Wide operating voltage range from 3.5V to 24V
Low 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
Applications
Automotive, Consumer and Industrial
Solid-state switch
Interrupter
Current detector
Proximity detection
Ordering information
Part No.
Temperature Code
Package Code
Option Code
Packing Form Code
US5881
E
UA
AAA-000
BU
US5881
L
UA
AAA-000
BU
US5881
E
SE
AAA-000
RE
US5881
L
SE
AAA-000
RE
Legend
Temperature Code: L for Temperature Range -40°C to 150°C
E for Temperature Range -40°C to 85°C
Package Code: UA for TO-92(Flat), SE for TSOT3
Packing Form: RE for Reel, BU for Bulk
Ordering example: US5881EUA-AAA-000-BU
Functional Diagram 1.
General Description 2.
The Melexis US5881 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.
US5881
Unipolar Hall Switch
Low Sensitivity
Page 2 of 11
REVISION 009 – JAN 17, 2018
3901005881
Contents
1. Functional Diagram ................................................................................................................................ 1
2. General Description ............................................................................................................................... 1
3. Glossary of Terms .................................................................................................................................. 3
4. Absolute Maximum Ratings ................................................................................................................... 3
5. Pin Definitions and Descriptions ............................................................................................................ 3
6. General Electrical Specifications ............................................................................................................ 4
7. Magnetic Specifications ......................................................................................................................... 4
8. Output Behaviour versus Magnetic Pole ................................................................................................ 4
9. Detailed General Description ................................................................................................................. 5
10. Unique Features .................................................................................................................................. 5
11. Performance Graphs ............................................................................................................................ 6
Typical Magnetic Switch Points vs VDD ............................................................................................. 6 11.1.
Magnetic Switch Points vs Temperature ......................................................................................... 6 11.2.
Typical Supply Current vs VDD ........................................................................................................... 6 11.3.
Typical Saturation Voltage vc Temperature (VDD=12V; Iout=20mA) .............................................. 6 11.4.
12. Application Information ....................................................................................................................... 7
Typical Three-Wire Application Circuit ............................................................................................ 7 12.1.
Two-Wire Circuit ............................................................................................................................... 7 12.2.
Automotive and Harsh, Noisy Environments Three-Wire Circuit ................................................... 7 12.3.
13. Application Comments ......................................................................................................................... 7
14. Standard information regarding manufacturability of Melexis products with different soldering
processes .............................................................................................................................................. 8
15. ESD Precautions ................................................................................................................................... 8
16. Package Information ............................................................................................................................ 9
SE Package (TSOT-3L) ....................................................................................................................... 9 16.1.
UA Package (TO-92 flat) .................................................................................................................. 10 16.2.
17. Contact .............................................................................................................................................. 11
18. Disclaimer .......................................................................................................................................... 11
US5881
Unipolar Hall Switch
Low Sensitivity
Page 3 of 11
REVISION 009 – JAN 17, 2018
3901005881
Glossary of Terms 3.
MilliTesla (mT), Gauss Units of magnetic flux density:
1mT = 10 Gauss
RoHS Restriction of Hazardous Substances
TSOT Thin Small Outline Transistor (TSOT package) – also referred with the Melexis package
code “SE”
ESD Electro-Static Discharge
BLDC Brush-Less Direct-Current
Absolute Maximum Ratings 4.
Parameter
Symbol
Units
Supply Voltage
VDD
V
Supply Current
IDD
mA
Output Voltage
VOUT
V
Output Current
IOUT
mA
Storage Temperature Range
TS
°C
Maximum Junction Temperature
TJ
°C
Table 1: Absolute maximum ratings
Exceeding the absolute maximum ratings may cause permanent damage. Exposure to absolute-maximum- rated
conditions for extended periods may affect device reliability.
Operating Temperature Range
Symbol
Value
Units
Temperature Suffix “E”
TA
-40 to 85
°C
Temperature Suffix “L”
TA
-40 to 150
°C
Pin Definitions and Descriptions 5.
SE Pin No
UA Pin No
Name
Type
Function
1
1
VDD
Supply
Supply Voltage
pin
2
3
OUT
Output
Open Drain
Output pin
3
2
GND
Ground
Ground pin
Table 2: Pin definitions and descriptions
US5881
Unipolar Hall Switch
Low Sensitivity
Page 4 of 11
REVISION 009 – JAN 17, 2018
3901005881
General Electrical Specifications 6.
DC Operating Parameters TA = 25oC, VDD = 12V (unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Units
Supply Voltage
VDD
Operating
3.5
24
V
Supply Current
IDD
B < BRP
1.5
2.5
5
mA
Output Saturation Voltage
VDSon
IOUT = 20mA, B > BOP
0.4
0.5
V
Output Leakage Current
IOFF
B < BRP, VOUT = 24V
0.01
10
µA
Output Rise Time
tr
RL = 1kΩ, CL = 20pF
0.25
µs
Output Fall Time
tf
RL = 1kΩ, CL = 20pF
0.25
µs
Maximum Switching Frequency
FSW
10
KHz
SE Package Thermal Resistance
RTH
Single layer (1S) Jedec board
301
°C/W
UA Package Thermal Resistance
RTH
200
°C/W
Table 3: Electrical specifications
Magnetic Specifications 7.
DC Operating Parameters TA = -40 ᵒC to 125 ᵒC, VDD = 3.5V to 7V (unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Units
Operating Point
BOP
15
25
30
mT
Release Point
BRP
9.5
20
28
mT
Hysteresis
BHYST
2
4.3
5.5
mT
Table 4: Magnetic specifications
Output Behaviour versus Magnetic Pole 8.
DC Operating Parameters TA = -40 ᵒC to 150 ᵒC, VDD = 3.5V to 24V (unless otherwise specified)
Parameter
Test Conditions (SE)
OUT (SE)
OUT (UA)
South pole
B > BOP
High
Low
Null or weak magnetic field
B → 0 or B < BRP
High
High
North pole
B > BOP
Low
High
Table 5: Output behaviour versus magnetic pole
US5881
Unipolar Hall Switch
Low Sensitivity
Page 5 of 11
REVISION 009 – JAN 17, 2018
3901005881
Detailed General Description 9.
Based on mixed signal CMOS technology, Melexis US5881 is a Hall-effect device with low magnetic sensitivity. Its sensitivity
enables high accuracy in position sensing by the use of small air gap.
The chopper-stabilized amplifier uses switched capacitor technique to suppress the offset generally observed with Hall
sensors and amplifiers. The CMOS technology makes this advanced technique possible and contributes to smaller chip size
and lower current consumption than bipolar technology. The small chip size is also an important factor to minimize the
effect of physical stress.
This combination results in more stable magnetic characteristics and enables faster and more precise design.
The wide operating voltage from 3.5V to 24V, “L” and “E” operating temperature range and low current consumption make
this device especially suitable for automotive solid state switch applications.
The output signal is open-drain type. Such output allows simple connectivity with TTL or CMOS logic by using a pull-up
resistor tied between a pull-up voltage and the device output.
Unique Features 10.
The US5881 exhibits unipolar magnetic switching characteristics. Therefore, it opera tes only with one magnetic
pole.
OUT = High
Flux density
Output level
BOP
BRP
0mT
OUT switches to Low
OUT = Low
OUT switches to High
Unipolar switch characteristic
The UA package is south pole active:
Applying a south magnetic pole greater than BOP facing the branded
side of the package switches the output low.
The SE package is north pole active:
Applying a north magnetic pole greater than BOP facing the branded
side of the package switches the output low.
Removing the magnetic field (B→0) switches the output high.
The use of the opposite magnetic pole facing the branded side
does not affect the output state.
A magnetic hysteresis BHYST keeps BOP and BRP separated by a minimal value. This hysteresis prevents output oscillation
near the switching point.
US5881
Unipolar Hall Switch
Low Sensitivity
Page 6 of 11
REVISION 009 – JAN 17, 2018
3901005881
Performance Graphs 11.
Typical Magnetic Switch Points vs 11.1.
VDD
Magnetic Switch Points vs 11.2.
Temperature
Typical Supply Current vs VDD
11.3.
Typical Saturation Voltage vc 11.4.
Temperature (VDD=12V; Iout=20mA)
US5881
Unipolar Hall Switch
Low Sensitivity
Page 7 of 11
REVISION 009 – JAN 17, 2018
3901005881
Application Information12.
Typical Three-Wire Application Circuit 12.1. Two-Wire Circuit 12.2.
Automotive and Harsh, Noisy Environments 12.3.
Three-Wire Circuit
Application Comments 13.
For proper operation, a 100nF bypass capacitor should be placed as close as possible to the device between the VDD and
ground pin.
For reverse voltage protection, it is recommended to connect a resistor or a diode in series with the VDD pin. When
using a resistor, three points are important:
- the resistor has to limit the reverse current to 50mA maximum (VCC / R1 ≤ 50mA)
- the resulting device supply voltage VDD has to be higher than VDD min (VDD = VCC – R1.IDD)
- the resistor has to withstand the power dissipated in reverse voltage condition (PD = VCC2 / R1)
When using a diode, a reverse current cannot flow and the voltage drop is almost constant (≈0.7V).
Therefore, a 100Ω/0.25W resistor for 5V application and a diode for higher supply voltage are recommended. Both
solutions provide the required reverse voltage protection.
When a weak power supply is used or when the device is intended to be used in noisy environment, it is
recommended that figure 13.3 from the Application Information section is used.
The low-pass filter formed by R1 and C1 and the zener diode Z1 bypass the disturbances or voltage spikes occurring on
the device supply voltage VDD. The diode D1 provides additional reverse voltage protection.
US5881
Unipolar Hall Switch
Low Sensitivity
Page 8 of 11
REVISION 009 – JAN 17, 2018
3901005881
Standard information regarding manufacturability of Melexis products 14.
with different soldering processes
Our products are classified and qualified regarding soldering technology, solderability and moisture sensitivity level
according to following test methods:
Reflow Soldering SMD’s (Surface Mount Devices)
IPC/JEDEC J-STD-020
Moisture/Reflow Sensitivity Classification for Nonhermetic Solid State Surface Mount Devices
(classification reflow profiles according to table 5-2)
EIA/JEDEC JESD22-A113
Preconditioning of Nonhermetic Surface Mount Devices Prior to Reliability Testing
(reflow profiles according to table 2)
Wave Soldering SMD’s (Surface Mount Devices) and THD’s (Through Hole Devices)
EN60749-20
Resistance of plastic- encapsulated SMD’s to combined effect of moisture and soldering heat
EIA/JEDEC JESD22-B106 and EN60749-15
Resistance to soldering temperature for through-hole mounted devices
Iron Soldering THD’s (Through Hole Devices)
EN60749-15
Resistance to soldering temperature for through-hole mounted devices
Solderability SMD’s (Surface Mount Devices) and THD’s (Through Hole Devices)
EIA/JEDEC JESD22-B102 and EN60749-21
Solderability
For all soldering technologies deviating from above mentioned standard conditions (regarding peak temperature,
temperature gradient, temperature profile etc) additional classification and qualification tests have to be agreed upon with
Melexis.
The application of Wave Soldering for SMD’s is allowed only after consulting Melexis regarding assurance of adhesive
strength between device and board.
Melexis is contributing to global environmental conservation by promoting lead free solutions. For more information on
qualifications of RoHS compliant products (RoHS = European directive on the Restriction Of the use of certain Hazardous
Substances) please visit the quality page on our website: http://www.melexis.com/quality.aspx
ESD Precautions 15.
Electronic semiconductor products are sensitive to Electro Static Discharge (ESD).
Always observe Electro Static Discharge control procedures whenever handling semiconductor products.
US5881
Unipolar Hall Switch
Low Sensitivity
Page 9 of 11
REVISION 009 – JAN 17, 2018
3901005881
Package Information 16.
SE Package (TSOT-3L) 16.1.
Notes:
1. Dimension “D” and “E1” do not include
mold flash or protrusions. Mold flash or
protrusion shall not exceed 0.15mm on
“D” and 0.25mm on “E” per side.
2. Dimension “b” does not include dambar
protrusion.
Marking:
Top side : 8yww
8 = part number (US5881)
y = last digit of year
ww = calendar week
Hall plate location
Notes:
1. All dimensions are in millimeters
Package line
TOP VIEW
0.275 TYP
END VIEW
1.417
0.891
1
N
e
E
E1
b
e1
D
A
A2
A1
a
L
C
This table in mm
N
A
A1
A2
D
E
E1
L
b
c
e
e1

3
min
–
0.025
0.85
2.80
2.60
1.50
0.30
0.30
0.10
0.95
BSC
1.90
BSC
0°
max
1.00
0.10
0.90
3.00
3.00
1.70
0.50
0.45
0.20
8°
US5881
Unipolar Hall Switch
Low Sensitivity
Page 10 of 11
REVISION 009 – JAN 17, 2018
3901005881
UA Package (TO-92 flat) 16.2.
Notes:
1. Mold flashes and protrusion are not included.
2. Gate burrs shall not exceed 0.127um on the top side.
This table in mm
A
D
E
F
J
L
L1
S
b1
b2
c
e
e1
min
2.80
3.90
1.40
0.00
2.51
14.0
1.55
0.63
0.35
0.43
0.35
2.51
1.24
max
3.20
4.30
1.60
0.20
2.72
15.0
1.75
0.84
0.44
0.52
0.44
2.57
1.30




min
5°
MAX
5°
REF
45°
REF
3°
REF
max
2.2
1.8
1.2
1.6
0.395
0.455
US5881
Unipolar Hall Switch
Low Sensitivity
Page 11 of 11
REVISION 009 – JAN 17, 2018
3901005881
Contact 17.
For the latest version of this document, go to our website at www.melexis.com.
For additional information, please contact our Direct Sales team and get help for your specific needs:
Europe, Africa
Telephone: +32 13 67 04 95
Email : sales_europe@melexis.com
Americas
Telephone: +1 603 223 2362
Email : sales_usa@melexis.com
Asia
Email : sales_asia@melexis.com
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furnishing, performance or use of the technical data or use of the product(s) as described herein (“Product”) (ii) any and al l liability, including without limitation, special,
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The Information is provided "as is” and Melexis reserves the right to change the Information at any time and without notice. Therefore, before placing orders and/or prior to
designing the Product into a system, users or any third party should obtain the latest version of the relevant information to verify that the information being relied upon is current.
Users or any third party must further determine the suitability of the Product for its application, including the level of reliability required and determine whether it is fit for a
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