SS129
Unipolar Hall-Effect Digital Switch
Packages
Features and Benefits
–
–
–
–
–
–
–
–
–
4.5V to 24V Operation
-40℃ to 150℃ Superior temperature operation
Bipolar technology
Open-collector 25 mA output
Reverse battery protection
Solid-state reliability
Resistant to physical stress
Small Size-SOT23 3L or SIP 3L
Activate with small, commercially available
Permanent magnets
3 pin SOT23 (suffix SO)
3 pin SIP (suffix UA)
Functional Block Diagram
VDD
Voltage
Regulator
Application Examples
–
–
–
–
–
–
–
Automotive, Consumer and Industrial
Solid-state switch
Brushless DC motor commutation
Speed detection
Angular position detection
Linear position detection
Proximity detection
OUT
Chopper
Hall
Plate
GND
SIP Package
Pin 1 – V
DD
Pin 2 – GND
Pin 3 – OUT
SOT Package
Pin 1 – V
DD
Pin 2 – OUT
Pin 3 – GND
General Description
The SS129 is a unipolar Hall-effect sensor IC fabricated
from bipolar technology. The device integrates a voltage
regulator, reverse battery protection diode, Hall sensor
with dynamic offset cancellation system, temperature
compensation circuitry, small signal amplifier, Schmitt
trigger and an open-collector output to sink up to 25 mA.
With suitable output pull up, they can be used with bipolar
or CMOS logic circuits
These Hall-effect switches are monolithic integrated circuits with tighter magnetic specifications, designed to operate
continuously over extended temperatures to +150
℃
, and are more stable with both temperature and supply voltage
changes. The unipolar switching characteristic makes these devices ideal for use with a simple bar or rod magnet.
Thanks to its wide operating voltage range and extended choice of temperature range, it is quite suitable for use in
automotive, industrial and consumer applications.
The device is delivered in a Small Outline Transistor (SOT) and in a Plastic Single In Line ( SIP 3L flat). Both 3-lead
packages are RoHS compliant.
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V2.10
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SS129
Unipolar Hall-Effect Digital Switch
Glossary of Terms
MilliTesla (mT), Gauss
RoHS
Operating Point (B
OP
)
Release Point (B
RP
)
Units of magnetic flux density: 1mT = 10 Gauss
Restriction of Hazardous Substances
Magnetic flux density applied on the branded side of the package which turns the output
driver ON (V
OUT
= V
DSon
)
Magnetic flux density applied on the branded side of the package which turns the output
driver OFF (V
OUT
= high)
Pin Definitions and Descriptions
SOT Pin
№
SIP Pin
№
1
2
3
1
3
2
Name
VDD
OUT
GND
Type
Supply
Output
Ground
Function
Supply Voltage pin
Open Drain Output pin
Ground pin
Table 1: Pin definitions and descriptions
Absolute Maximum Ratings
Parameter
Symbol
Supply Voltage
V
DD
Supply Current
I
DD
Output Voltage
V
OUT
Output Current
I
OUT
Storage Temperature Range
T
S
Table 2: Absolute maximum ratings
Operating Temperature Range
Temperature Suffix “E”
Temperature Suffix “K”
Temperature Suffix “L”
Symbol
T
A
T
A
T
A
Value
28
50
28
50
-65 to 170
Units
V
mA
V
mA
°C
Value
-40 to 85
-40 to125
-40 to 150
Units
°C
°C
°C
Exceeding the absolute maximum ratings may cause permanent damage. Exposure to absolute-maximum-rated
conditions for extended periods may affect device reliability.
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V2.10
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SS129
Unipolar Hall-Effect Digital Switch
General Electrical Specifications
DC Operating Parameters T
A
= 25℃, V
DD
= 4.5V to 24V (unless otherwise specified)
Parameter
Symbol
Test Conditions
Operating
B < B
RP
I
OUT
= 20mA, B > B
OP
B < B
RP
V
OUT
= 24V
R
L
= 820Ω, C
L
= 20pF
R
L
= 820Ω, C
L
= 20pF
Min
4.5
4
Typ
5
0.3
0.1
0.04
0.18
Max
24
7
0.5
10
2.0
2.0
Units
V
mA
V
µA
µs
µs
Supply Voltage
V
DD
Supply Current
I
DD
Output Saturation Voltage V
DSon
Output Leakage Current
I
OFF
Output Rise Time
t
r
Output Fall Time
t
f
Table 3: Electrical Specifications
Magnetic Specifications
DC Operating Parameters V
DD
= 4.5V to 24V (unless otherwise specified)
SS129
Parameter
Operating Point
Release Point
Hysteresis
Symbol
B
OP
B
RP
B
HYST
Test Conditions
Ta=25
℃
,V
DD
=12V DC
Min
160
110
Typ
180
140
40
Max
200
170
Units
G
G
G
Table 4: Magnetic Specifications
Application Information
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V2.10
May 1, 2012
SS129
Unipolar Hall-Effect Digital Switch
Package AT, 3-Pin SOT-23:
Ordering Information
Part No.
SS129ESOT
SS129EUA
SS129KSOT
SS129KUA
SS129LSOT
SS129LUA
Pb-free
YES
YES
YES
YES
YES
YES
Temperature Code
-40°C to 85°C
-40°C to 85°C
-40°C to 125°C
-40°C to 125°C
-40°C to 150°C
-40°C to 150°C
Package Code
SOT-23
TO-92
SOT-23
TO-92
SOT-23
TO-92
Packing
7-in. reel, 3000 pieces/reel
Bulk, 1000 pieces/bag
7-in. reel, 3000 pieces/reel
Bulk, 1000 pieces/bag
7-in. reel, 3000 pieces/reel
Bulk, 1000 pieces/bag
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V2.10
May 1, 2012
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