390
1
00
5
781
Rev 014
Features and Benefits
Wide operating voltage range f
24V
Medium sensitivity
CMOS technology
Chopper-stabilized amplifier s
tage
Low current consumption
Open drain output
Thin SOT23 3L and flat TO-92
3L
both RoHS Compliant
packages
Ordering Code
Product Code
Temperature Code
US5781 E
US5781 L
US5781 E
US5781 L
US5781 L
Legend:
Temperature Code:
L for Temperature Range
E for
Temperature Range
Package Code: SE f
or TSOT, UA for TO
Packing Form:
BU for Bulk, CA for Ammopack
Ordering example:
US5781ESE
1 Functional Diagram
Unipolar Hall Switch – Medi
u
P
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e
1
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r
om 3.5V to
tage
3L
Application Exa
m
Automotive, Cons
u
Solid-state switch
Interrupter
Current detector
Proximity detecti
on
Temperature Code
Package Code
Option Code Packing Form Code
SE AAA-000
RE
SE AAA-000
RE
UA AAA-000
BU
UA AAA-000
BU
UA AAA-000
CA
L for Temperature Range
-40°C to 150°C
Temperature Range
-40°C to 85°C
or TSOT, UA for TO
-92(Flat)
BU for Bulk, CA for Ammopack
US5781ESE
-AAA-000-RE
2 General Descript
io
The Melexis US5781 is a
switch designed in mix
ed
technology.
The device integrates a vo
l
sensor with dynamic offset
c
Schmitt trigger and an open-
d
in a single package.
Thanks to its wide operati
ng
extended choice of tempe
r
suitable for use in autom
ot
switch applications.
The device is delivered in
a
Transistor (TSOT) for surfac
e
in a Plastic Single In Line (T
O
hole mount.
Both 3-lead packages are
RoHS
U
S
5
7
81
u
m Sensitivity
Data
S
h
e
et
Mar/12
m
ples
u
mer and Industrial
on
Option Code Packing Form Code
RE
RE
BU
BU
CA
io
n
unipolar Hall-effect
ed
signal CMOS
l
tage regulator, Hall
c
ancellation system,
d
rain output driver, all
ng
voltage range and
r
ature range, it is
ot
ive and solid state
a
Thin Small Outline
e
mount process and
O
-92 flat) for through-
RoHS
compliant.
U
S
5
7
81
Unipolar Hall Switch – Medium Sensitivity
390
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Data
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Table of Contents
1 Functional Diagram ........................................................................................................ 1
2 General
Descr
ip
t
ion ........................................................................................................ 1
3 Glossary of Terms .......................................................................................................... 3
4 Absolute Maximum
Rat
ing
s
........................................................................................... 3
5 Pin Definitions and
Descr
ip
t
ion
s
................................................................................... 3
6 General Electrical Specifications .................................................................................. 4
7 Magnetic
Specifications
................................................................................................. 4
8 Output Behaviour versus Magnetic
Pole
...................................................................... 4
9 Detailed General
Descr
ip
t
ion ......................................................................................... 5
10 Unique F
eat
u
res
............................................................................................................ 5
11 Performance Graphs .................................................................................................... 6
11.1 Typical Magnetic Switch Points vs V
DD
....................................................................................................6
11.2 Magnetic Switch Points vs
Temperature
.................................................................................................6
11.3 Typical Saturation Voltage vsTemperature
(V
DD
=12V;Iout=20mA)
.........................................................6
12 Application Information................................................................................................ 7
12.1 Typical Three-Wire Application Circuit ....................................................................................................7
12.2 Two-Wire Circuit ......................................................................................................................................7
12.3 Automotive and Harsh, Noisy Environments Three-Wire Circuit ............................................................7
13 Application
C
o
mme
n
ts
................................................................................................. 7
14 Standard information regarding manufacturability of Melexis products with
different soldering processes........................................................................................... 8
15 ESD P
reca
u
t
ion
s
........................................................................................................... 8
16 Package Information..................................................................................................... 9
16.1 SE Package (TSOT-3L)...........................................................................................................................9
16.2 UA Package (TO-92 flat) .......................................................................................................................10
17
Disclaimer....................................................................................................................
11
U
S
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Unipolar Hall Switch – Medium Sensitivity
390
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Rev 014
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Data
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3 Glossary of Terms
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
4 Absolute Maximum Ratings
Parameter Symbol Value Units
S
upp
l
y
V
o
l
t
a
g
e
V
DD
28
V
S
upp
l
y
Cu
rr
e
n
t
I
DD
50
m
A
Output
V
o
l
t
a
g
e
V
O
UT
28
V
Output
Cu
rr
e
n
t
I
O
UT
50
m
A
Storage Temperature
Range
T
S
-50 to
150
°
C
M
a
x
i
m
u
m
J
un
c
t
i
on
Temperature
T
J
165
°
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
S
u
ff
i
x
“
E
”
T
A
-40 to
85
°
C
Temperature
S
u
ff
i
x
“
L
”
T
A
-40 to
150
°
C
5 Pin Definitions and Descriptions
SE Pin №
UA Pin №
Name Type Function
1
1
V
DD
S
upp
l
y
S
upp
l
y
V
o
l
t
a
g
e
p
i
n
2
3
O
UT
O
u
t
pu
t
Open
Dr
a
i
n
Output
p
i
n
3
2
GND
G
r
ound
Ground p
i
n
Table 2: Pin definitions and descriptions
SE package UA package
U
S
5
7
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Unipolar Hall Switch – Medium Sensitivity
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Data
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A
DD
A
DD
6 General Electrical Specifications
DC Operating Parameters T = 25
o
C, V = 12V (unless otherwise specified)
Parameter Symbol Test Conditions Min Typ Max Units
S
upp
l
y
V
o
l
t
a
g
e
V
DD
O
p
e
r
a
t
i
ng
3.5
24
V
S
upp
l
y
Cu
rr
e
n
t
I
DD
B <
B
R
P
0.5
2.5
5
m
A
Output
S
a
t
u
r
a
t
i
on
V
o
l
t
a
g
e
V
D
S
on
I
OUT
= 20mA, B > B
O
P
0.3
0.5
V
Output
L
ea
k
a
g
e
Cu
rr
e
n
t
I
OFF
B < B
RP,
V
OUT
=
24
V
0.01
10
µ
A
Output
R
i
s
e
T
i
m
e
t
r
R
L
= 1kΩ, C
L
=
20pF
0.25
µ
s
Output
F
a
ll
T
i
m
e
t
f
R
L
= 1kΩ, C
L
=
20pF
0.25
µ
s
M
a
x
i
m
u
m
S
w
i
t
c
h
i
ng
F
r
e
qu
e
n
c
y
F
S
W
10
K
H
z
SE
Package
T
h
e
r
m
a
l
R
e
s
i
s
t
a
n
c
e
R
TH
S
i
ng
l
e
l
a
y
e
r
(1S)
Jedec
bo
a
r
d
301
°
C
/W
UA
Package
T
h
e
r
m
a
l
R
e
s
i
s
t
a
n
c
e
R
TH
200
°
C
/W
Table 3: Electrical specifications
7 Magnetic Specifications
DC Operating Parameters T = 25
o
C, V = 12V (unless otherwise specified)
Parameter Symbol Test Conditions Min Typ Max Units
O
p
e
r
a
t
i
ng
P
o
i
n
t
B
O
P
7
12
15
m
T
R
e
l
ea
s
e
P
o
i
n
t
B
RP
3.5
7.5
10
m
T
Hy
s
t
e
r
e
s
i
s
B
H
Y
S
T
2
5
7
m
T
Table 4: Magnetic specifications
8 Output Behaviour versus Magnetic Pole
o o
DC Operating Parameters T
A
= -40 C to 150 C, V
DD
= 3.5V to 24V (unless otherwise specified)
Parameter Test Conditions (SE) OUT (SE) OUT (UA)
South po
l
e
B >
B
O
P
H
i
gh
L
o
w
Null
or weak m
a
gn
e
t
i
c
f
i
e
l
d
B
-7 0
or B < B
RP
H
i
gh
H
i
gh
North
po
l
e
B >
B
O
P
L
o
w
H
i
gh
Table 5: Output behaviour versus magnetic pole
North pole
South
po
l
e
OUT = low (V
DSon
) OUT = low (V
DSon
)
SE package UA package
390
1
00
5
781
Rev 014
9 Detailed General Desc
ri
Based on mixed signal CMOS techn
o
sensitivity. Its sensitivity enables high
The chopper-stabilized amplifier uses
with Hall sensors and amplifiers. The
CM
contributes to smaller chip size and l
o
also an important factor to minimize t
h
This combination results in more stab
l
The wide operating voltage fro
m 3.5V
consumption make this device especi
a
The output signal is open-drain type.
S
a pull-up resistor tied between a pull-
u
10 Unique Features
The US5781 exhibits unipolar m
agnet
magnetic pole.
Unipolar switch characteristic
A magnetic hysteresis B
HYST
keeps B
OP
output oscillation near the switching
po
Unipolar Hall Switch – Medi
u
P
a
g
e
5
of 11
ri
ption
logy, Melexis US5781 is a Hall-effect device with m
ed
accuracy in position sensing by the use of small air
g
switched capacitor technique to suppress the offset
CM
OS technology makes this advanced technique
po
o
wer current consumption than bipolar technology. T
h
e effect of physical stress.
l
e magnetic characteristics and enables faster and
m
to 24V, “L” and “E” operating temperature range an
d
a
lly suitable for automotive and solid state switch ap
p
S
uch output allows simple connectivity with TTL or
CM
u
p voltage and the device output.
agnet
ic switching characteristics. Therefore, it operates o
n
The UA package is south pole active:
Applying a south magnetic pole greater than
B
branded side of the package switches the out
p
The SE package is north pole active:
Applying a north magnetic pole greater than
B
branded side of the package switches the out
p
Removing the magnetic field (B
→
0) switches
The use of the opposite magnetic pole facing
does not affect the output state.
OP
and B
RP
separated by a minimal value. This hyste
r
po
int.
U
S
5
7
81
u
m Sensitivity
Data
S
h
e
et
Mar/12
ed
ium magnetic
g
ap.
generally observed
po
ssible and
he
small chip size is
m
ore precise design.
d
low current
p
lications.
CM
OS logic by using
n
ly with one
B
OP
facing the
p
ut low.
B
OP
facing the
p
ut low.
the output high.
the branded side
r
esis prevents
390
1
00
5
781
Rev 014
11 Performance Graphs
11.1 Typical Magnetic Switc
h
vs V
DD
11.3 Typical Saturation
vsTemperature
(V
DD
=12V;Iout=20mA)
Unipolar Hall Switch – Medi
u
P
a
g
e
6
of 11
h
Points 11.2 Magnetic Switch
Temperature
Voltage
U
S
5
7
81
u
m Sensitivity
Data
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Mar/12
Points vs
390
1
00
5
781
Rev 014
12 Application Informati
o
12.1 Typical Three-Wire App
lica
12.3 Automotive and Harsh,
No
Three-Wire Circuit
13 Application Commen
ts
For proper operation, a 100nF bypas
s
the V
DD
and ground pin.
For reverse voltage protection, it is re
c
When using a resistor, three points ar
e
- the resistor has to limit the r
e
- the resulting device supply
v
- the resistor has to withsta
nd
When using a diode, a reverse curr
ent
Therefore, a 100
Ω
/0.25W resistor for
5V
Both solutions provide the required re
v
When a weak power supply is used
or
recommended that figure 13.3 fr
om the
The low-pass filter formed by R1 and
C
occurring on the device supply volt
age
Unipolar Hall Switch – Medi
u
P
a
g
e
7
of 11
o
n
lica
tion Circuit 12.2 Two-Wi
re
No
isy Environments
Note:
With this circuit,
p
currents can
be de
two connecting w
i
The resistors RL
a
to bias the input
c
part specificati
ons
B
RP
: I
OFF
= I
R
+ I
B
OP
:
I
ON
= I
OFF
+ I
ts
s
capacitor should be placed as close as possible to
t
c
ommended to connect a resistor or a diode in seri
es
e
important:
e
verse current to 50mA maximum (V
CC
/ R1
≤
50mA
)
v
oltage V
DD
has to be higher than V
DD
min (V
DD
= V
C
C
nd
the power dissipated in reverse voltage condition (
P
ent
cannot flow and the voltage drop is almost cons
tant
5V
application and a diode for higher supply voltag
e
v
erse voltage protection.
or
when the device is intended to be used in noisy en
vi
om the
Application Information section is used.
C
1 and the zener diode Z1 bypass the disturbances
age
V
DD
. The diode D1 provides additional reverse vol
ta
U
S
5
7
81
u
m Sensitivity
Data
S
h
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et
Mar/12
re
Circuit
p
recise ON and OFF
be de
tected using only
i
res.
a
nd Rb can be used
c
urrent. Refer to the
ons
for limiting values.
+ I
DD
= V
DD
/R
b
+ I
DD
+ I
OUT
= I
OFF
+ V
DD
/R
L
t
he device between
es
with the V
DD
pin.
)
C
– R1.I
DD
)
2
P
D
= V
CC
/ R1)
tant
(
≈
0.7V).
e
are recommended.
vi
ronment, it is
or voltage spikes
ta
ge protection.
U
S
5
7
81
Unipolar Hall Switch – Medium Sensitivity
390
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Rev 014
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14 Standard information regarding manufacturability of
Melexis products 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
15 ESD Precautions
Electronic semiconductor products are sensitive to Electro Static Discharge (ESD).
Always observe Electro Static Discharge control procedures whenever handling semiconductor products.
390
1
00
5
781
Rev 014
0.891
+/-
0.05
0.20
2.90
B
S
C
see note 3
0.95
B
S
C
0.30
0.45
16 Package Information
16.1 SE Package (TSOT-3L)
Unipolar Hall Switch – Medi
u
P
a
g
e
9
of 11
1.90
B
S
C
0.127
+
0.023
-
0.007
0.15
0.20
U
S
5
7
81
u
m Sensitivity
Data
S
h
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Mar/12
390
1
00
5
781
Rev 014
1.65
+/-
0.10
3.00
+/-
0.2 0
2.5
m
in
see
note
4
16.2 UA Package (TO-92 flat)
Unipolar Hall Switch – Medi
u
P
a
g
e
10
of 11
14.5
+/-
0.5
U
S
5
7
81
u
m Sensitivity
Data
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U
S
5
7
81
Unipolar Hall Switch – Medium Sensitivity
390
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Data
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17 Disclaimer
Devices sold by Melexis are covered by the warranty and patent indemnification provisions appearing
in its Term of Sale. Melexis makes no warranty, express, statutory, implied, or by description regarding
the information set forth herein or regarding the freedom of the described devices from patent
infringement. Melexis reserves the right to change specifications and prices at any time and without
notice. Therefore, prior to designing this product into a system, it is necessary to check with Melexis for
current information. This product is intended for use in normal commercial applications. Applications
requiring extended temperature range, unusual environmental requirements, or high reliability
applications, such as military, medical life-support or life-sustaining equipment are specifically not
recommended without additional processing by Melexis for each application.
The information furnished by Melexis is believed to be correct and accurate. However, Melexis shall
not be liable to recipient or any third party for any damages, including but not limited to personal injury,
property damage, loss of profits, loss of use, interrupt of business or indirect, special incidental or
consequential damages, of any kind, in connection with or arising out of the furnishing, performance or
use of the technical data herein. No obligation or liability to recipient or any third party shall arise or
flow out of Melexis’ rendering of technical or other services.
© 2012 Melexis NV. All rights reserved.
For the latest version of this document, go to our website at
www.melexis.com
Or for additional information contact Melexis Direct:
Europe, Africa, Asia: America:
Phone: +32 1367 0495 Phone: +1 248 306 5400
E-mail: sales_europe@melexis.com E-mail: sales_usa@melexis.com
ISO/TS 16949 and ISO14001 Certified