Cosemitech
Industry Product Group
FEATURES and FUNCTIONAL DIAGRAM
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CH462S/CH462T/CH462E
This is advanced information on a new product now
in development or undergoing evaluation. Details are
subject to change without notice and Cosemitech
assumes no obligation for future manufacture of this
product. Contact Cosemitech for the latest status.
REV 1.0
PACKAGE
·
·
·
·
·
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Enhanced sensitivity: will operate from only 45 Gauss typical,
at 25°C allowing the use of smaller, potentially lower-cost
magnets or wider air gaps
Subminiature, SOT-23-3L(CH462S) or SOT-89-3L(CH462E)
surface mount package supplied on tape and reel allows for a
compact design with automated component placement,
helping to reduce manufacturing costs
Small, leaded, flat, TO-92S package (CH462T) allows for a
compact PCB layout
Bipolar latching magnetics respond to alternating North and
South poles, making these products well-suited for accurate
speed sensing and RPM (revolutions per minute)
measurement
Wide operating voltage range of 3.8V to 30V makes these
sensors useable in a wide range of applications
Built-in reverse voltage capability enhances the protection of
the sensor and the circuits with which it is used
Robust design: will operate up to 150 °C
RoHS-compliant material meets directive 2011/65/EU
TO-92S
SOT-23 -3L
SOT-89-3L
APPLICATIONS
Transportation
- Speed and RPM
(revolutions per minute)
sensing
- Tachometer, counter pickup
- Motor and fan control
- Electric window lift
- Convertible roof position
- Automotive transmission
position
Industrial
- Speed and RPM sensing
- Tachometer, counter pickup
- Flow-rate sensing
- Brushless dc (direct
current) motor commutation
- Motor and fan control
- Robotics control
Medical
- Motor assemblies
- Medication dispense control
DESCRIPTION
The CH462S ,CH462E and CH462T are small, versatile digital Hall effect devices that are operated by
the magnetic field from a permanent magnet or an electromagnet, designed to respond to alternating North
and South poles.
These bipolar latching sensor ICs have enhanced sensitivity, which often allows for the use of less
expensive magnets.
These sensor ICs are available in three package styles, the CH462S in the subminiature SOT-23-3L
surface mount package, the CH462E in the subminiature SOT-89-3L surface mount package, and the
CH462T in the leaded, flat TO-92S package.
The CH462S’s and CH462E’s small size requires less PC board space, allowing it to be used in smaller
assemblies. Its 3V capability allows for use in low voltage applications, promoting energy efficiency.
The CH462S and CH462T are available on tape and reel; the CH462T is available in a bulk package
(1000 units per bag).
Page 1/11
Cosemitech
Industry Product Group
CH462S/CH462T/CH462E
This is advanced information on a new product now
in development or undergoing evaluation. Details are
subject to change without notice and Cosemitech
assumes no obligation for future manufacture of this
product. Contact Cosemitech for the latest status.
REV 1.0
Table of Contents
1. Product Family Members ..........................................................................................................3
2.
Pin Definitions and Descriptions
...............................................................................................3
3. Absolute Maximum Ratings ......................................................................................................3
4.
ESD Protections
........................................................................................................................4
5.
Function Description
................................................................................................................4
6.
Definition of Switching Function
...............................................................................................4
7.
Temperature Characterization
..................................................................................................4
8. Parameters Specification ..........................................................................................................5
9. Test Conditions ........................................................................................................................6
10.Typical Application Circuit ........................................................................................................6
11.Typical Output Waveform .........................................................................................................6
12. Package Information ...............................................................................................................7
Page 2/11
Cosemitech
Industry Product Group
1. Product Family Members
Part Number
CH462SR
CH462TB
CH462ER
Marking ID
C462
C462
C462
CH462S/CH462T/CH462E
This is advanced information on a new product now in
development or undergoing evaluation. Details are
subject to change without notice and Cosemitech
assumes no obligation for future manufacture of this
product. Contact Cosemitech for the latest status.
REV 1.0
Description
Bipolar latching, Hall-effect digital sensor IC, SOT-23-3L package, tape and
reel packing (3000 units per reel)
Bipolar latching, Hall-effect digital sensor IC, flat, TO-92S package, bulk
packing (1000 units per bag)
Bipolar latching, Hall-effect digital sensor IC, SOT-89-3L package, tape and
reel packing (1000 units per reel)
2. Pin Definitions and Descriptions
SOT-23-3L
(S)
1
2
3
TO-92S
(T)
1
3
2
SOT-89-3L
(E)
1
3
2
Name
VDD
OUT
GND
Type
Supply
Output
Ground
Supply Voltage pin
Open Collector Output pin
Ground pin
Function
SOT-23-3L
3. Absolute Maximum Ratings
Parameter
Supply Voltage
VDD Reverse Voltage VDD
Supply Current
Output Voltage
Output Current
Operating Ambient Temperature
Storage Temperature
Junction temperature
TO-92S
SOT-89-3L
Symbol
V
DD
V
RDD
I
DD
V
OUT
I
OUT
T
A
T
S
T
J
Min
-
-
-
-0.3
-
-40
-50
-50
Max
40
-40
20
40
25
150
150
165
Units
V
V
mA
V
mA
°C
°C
°C
Magnetic Flux
B
No Limit
Gauss
Note: Exceeding the absolute maximum ratings may cause permanent damage. Exposure to absolute-
maximum- rated conditions for extended periods may affect device reliability.
Page 3/11
Cosemitech
Industry Product Group
4. ESD Protections
Parameter
All pins
1)
All pins
2)
CH462S/CH462T/CH462E
This is advanced information on a new product now
in development or undergoing evaluation. Details are
subject to change without notice and Cosemitech
assumes no obligation for future manufacture of this
product. Contact Cosemitech for the latest status.
REV 1.0
Value
+/-4000
+/-400
Unit
V
V
V
All pins
3)
+/-1500
1) HBM (human body mode, 100pF, 1.5 kohm ) according to MIL-STD-883H Method 3015.8
2) MM (Machine Mode C=200pF, R=0Ω) according to JEDEC EIA/JESD22-A115
3) CDM (charged device mode) according to JEDEC EIA/JESD22-C101F
5. Function Description
The CH462S/CH462T/CH462E exhibits latch magnetic switching characteristics. Therefore, it
requires both south and north poles to operate properly.
The device behaves as a latch with symmetric operating and release switching points
(BOP=|BRP|). This means magnetic fields with equivalent strength and opposite direction drive
the output high and low.
Removing the magnetic field (B→0) keeps the output in its previous state. This latching
property defines the device as a magnetic memory.
A magnetic hysteresis BHYST keeps BOP and BRP separated by a minimal value. This
hysteresis prevents output oscillation near the switching point.
6. Magnetic Activation
7. Temperature Characteristics
Page 4/11
Cosemitech
Industry Product Group
CH462S/CH462T/CH462E
This is advanced information on a new product now in
development or undergoing evaluation. Details are
subject to change without notice and Cosemitech
assumes no obligation for future manufacture of this
product. Contact Cosemitech for the latest status.
REV 1.0
8. Parameters Specification (At 3.5V to 30V supply, 20mA load, TA= -40 ºC to
150 ºC except where otherwise specified.)
Symbol
V
DD
I
DD
V
DSon
I
OFF
T
R
T
F
Parameter
Supply voltage
Supply Current
Output saturation voltage
Output Leakage Current
Output rise time
Output fall time
Thermal resistance:
CH462S (SOT-23-3L)
CH462T (TO-92S)
CH462E (SOT-89-3L)
Magnetic operating point
Magnetic release point
Magnetic hysteresis
window
Maximum Switching
Frequency
Operating temperature
Storage temperature:
Test Condition
-40 °C to 150 °C
V
DD
= 5V
at 20mA, Gauss >120
B<-120GS
V
DD
=12V at 25 °C
C
L
= 20 pF
V
DD
=12V at 25 °C
C
L
= 20 pF
-
T
A
=25
o
C
T
A
=25
o
C
T
A
=25
o
C |B
OP
-B
RP
|
Min
3.5
-
-
-
-
-
-
-
-
5
-95
60
Typ.
-
5.0
-
-
-
-
303
203
230
45
-45
90
Max
30
10
0.4
10
1.5
1.5
-
-
-
95
-5
120
100
-
-
-40
-40
-
-
150
150
Units
V
mA
V
uA
uS
uS
°C /W
°C/W
°C/W
Gauss
Gauss
Gauss
KHz
°C
°C
R
TH
B
OP
B
RP
B
HYST
F
SW
T
T
S
.
NOTICE
Bipolar Hall-effect sensor ICs may have an initial output in either the ON or OFF state if powered up
with an applied magnetic field in the differential zone (applied magnetic field >Brp and <Bop).
Cosemitech recommends allowing 10 µs for output voltage to stabilize after supply voltage has
reached 5V.
NOTICE
The magnetic field strength (Gauss) required to cause the switch to change state (operate and
release) will be as specified in the magnetic characteristics. To test the switch against the specified
magnetic characteristics, the switch must be placed in a uniform magnetic field.
Page 5/11
PCB Design
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