Cosemitech
CH441/CH442/CH443/CH444
Automotive Product Group
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.
Preliminary Datasheet 1.4
FEATURES and FUNCTIONAL DIAGRAM
·
·
·
·
·
·
·
·
·
·
·
·
·
AEC-Q100 automotive qualified
Digital Bipolar-Latch Hall Sensor
Multiple Sensitivity Options (BOP / BRP):
+15 / -15 Gauss; +30 / -30 Gauss; +45 / -45 Gauss; +120 / 120 Gauss;
Chopper stabilization for stable operate points throughout
operating temperature range
On board voltage regulator for 2.5V to 22V range
Resistant to physical stress
Output short-circuit protection
Operation from unregulated supply
Reverse-battery and freewheeling protection
Solid-state reliability
Wide Operating temperature range: -40 to 150 oC
Small package sizes TO-92S, SOT-23 and SOT-89
RoHS-compliant material meets directive 2011/65/EU
PACKAGE
TO-92S
SOT-23-3L
SOT-89-3L
APPLICATIONS
- Speed and RPM sensing
- Tachometer, counter pickup
- Flow-rate sensing
- Brushless dc (direct
current) motor commutation
- Motor and fan control
- Robotics control
DESCRIPTION
The CH441/CH442/CH443/CH444 Hall-effect sensor is extremely temperature-stable and stressresistant sensor ICs, especially suited for operation over extended temperature ranges from -40°C to
150°C. Superior high temperature performance is possible through dynamic offset cancellation, which
reduces the residual offset voltage normally caused by device over-molding, temperature dependencies,
and thermal stress.
The device includes a voltage regulator, Hall-voltage generator, small-signal amplifier, chopper
stabilization, Schmitt trigger, and a short circuit protected open-drain output to sink up to 25 mA.
An on-board regulator permits operation with supply voltages of 2.5 to 22 V. The advantage of operating
down to 2.5V is that the device can used in 2.5V applications or with additional external resistance in
series with the supply pin for greater protection against high-voltage transient events.
The CH441/CH442/CH443/CH444 series is latch Hall switch. For the latch mode, there are also invert
polarity devices. Normally a south pole of sufficient strength turns on the output; However, for invert
polarity devices, a north pole of sufficient strength turns on the output.
The CH441/CH442/CH443/CH444 also integrated internal clamps against supply/output transients;
output short circuits protection; reverse battery conditions.
Three package styles provide a magnetically optimized package for most applications, SOT-23, TO-92S
and SOT-89. Each package type is lead (Pb) free (suffix, –T), with a 100% matte-tin-plated lead-frame.
Page 1/14
Cosemitech
CH441/CH442/CH443/CH444
Automotive Product Group
. 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.
Preliminary Datasheet 1.4
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. Application infromation .............................................................................................................6
10.Test Condition .........................................................................................................................6
11. Package Information ...............................................................................................................7
Page 2/14
Cosemitech
CH441/CH442/CH443/CH444
Automotive Product Group
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.
Preliminary Datasheet 1.4
1. Product Family Members
Part Number
Marking ID
CH441SR
C441
CH441TB
C441
CH441ER
C441
CH442SR
C442
CH442TB
C442
CH442ER
C442
CH443SR
C443
CH443TB
C443
CH443ER
C443
CH444SR
C444
CH444TB
C444
CH444ER
C444
CH441NSR
441N
CH441NTB
441N
CH441NER
441N
CH442NSR
442N
CH442NTB
442N
CH442NER
442N
CH443NSR
443N
CH443NTB
443N
CH443NER
443N
CH444NSR
444N
CH444NTB
444N
CH444NER
444N
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)
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)
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)
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)
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)
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)
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)
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)
Page 3/14
Cosemitech
CH441/CH442/CH443/CH444
Automotive Product Group
. 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.
Preliminary Datasheet 1.4
2. Pin Definitions and Descriptions
SOT-23-3L
(S)
1
TO-92S
(T)
1
SOT-89-3L
(E)
1
2
3
3
3
2
2
SOT-23-3L
Name
Type
Function
VDD
Supply
Supply Voltage pin
OUT
Output
Open Collector Output pin
GND
Ground
Ground pin
TO-92S
SOT-89-3L
3. Absolute Maximum Ratings
Parameter
Supply Voltage
VDD Reverse Voltage VDD
Symbol
VDD
VRDD
Min
-22
Max
24
Units
V
V
Supply Current
IDD
-
20
mA
Output Voltage
VOUT
-0.3
24
V
Output Current
IOUT
-
25
mA
Operating Ambient Temperature
TA
-40
150
°C
Storage Temperature
TS
-50
150
°C
Junction temperature
TJ
-50
165
°C
Magnetic Flux
B
No Limit
Gauss
Note: Exceeding the absolute maximum ratings may cause permanent damage. Exposure to absolutemaximum- rated conditions for extended periods may affect device reliability.
4. ESD Protections
Parameter
All pins 1)
All pins
Value
Unit
+/-8000
V
2)
+/-200
V
3)
+/-750
V
All pins
1) HBM (Human Body Mode) according to AEC-Q100-002
2) MM (Machine Mode) according to AEC-Q100-003
3) CDM (charged device mode) according to AEC-Q100-011
Page 4/14
Cosemitech
CH441/CH442/CH443/CH444
Automotive Product Group
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.
Preliminary Datasheet 1.4
5. Function Description
The CH441/CH442/CH443/CH444 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), it 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 5/14
Cosemitech
CH441/CH442/CH443/CH444
Automotive Product Group
. 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.
Preliminary Datasheet 1.4
8. Parameters Specification (VCC=3.3V supply, TA= -40 ºC to 150 ºC except
where otherwise specified.)
Symbol
VDD
IDD
VZSUPPLY
VZOUT
VRCC
IRCC
FC
tPO
VDSon
IOFF
IOUT(lim)
TR
TF
Td
RTH
FSW (2)
T
TS
CH441
BOP
BRP
BHYST
Bo
CH442
BOP
BRP
BHYST
Bo
CH443
BOP
Parameter
Supply voltage
Supply Current
Supply
Zener
Clamp
Voltage
Output
Zener
Clamp
Voltage
Reverse Battery Zener
Reverse Battery Current
Chopping Frequency
Test Condition
Min
Typ.
Max
Units
-40 °C to 150 °C
VDD = 3.3V
2.5
-
1.6
22
3
V
mA
ICC =7 mA; TA = 25°C
24
V
IOUT = 3mA
24
V
VCC = –22 V
-22
V
mA
KHz
-5
500
TA = 25°C; CLOAD = 10
pF
at 20mA, Gauss >BOP
VOUT = 24 V; Switch
state = Off
Short-Circuit Protection
RLOAD = 820 Ω, CLOAD
= 10 pF;
RLOAD = 820Ω, CLOAD =
10 pF;
B=Brp-100G
to
Bop+100G in 1us
–
–
30
μs
-
-
0.4
V
-
-
10
uA
30
–
90
mA
-
0.2
2
uS
-
0.1
2
uS
13
25
μs
-
303
203
230
-
°C /W
°C/W
°C/W
20
30
-
-40
-40
-
150
150
°C
°C
Magnetic operating point
Magnetic release point
Magnetic hysteresis window
|BOP-BRP|
Magnetic offset; BO = (BOP
+ BRP) / 2
TA=-40oC to 150oC
TA=-40oC to 150oC
6
-36
15
-15
36
-6
Gauss
Gauss
TA=-40oC to 150oC
12
30
50
Gauss
TA=-40oC to 150oC
-15
0
15
Gauss
Magnetic operating point
Magnetic release point
Magnetic hysteresis window
|BOP-BRP|
Magnetic offset; BO = (BOP
+ BRP) / 2
TA=-40oC to 150oC
TA=-40oC to 150oC
10
-50
30
-30
50
-10
Gauss
Gauss
TA=-40oC to 150oC
35
60
85
Gauss
TA=-40oC to 150oC
-15
0
15
Gauss
Magnetic operating point
TA=-40oC to 150oC
20
45
75
Gauss
Power-On Time
Output saturation voltage
Output Leakage Current
Output Current Limit
Output rise time
Output fall time
Output delay Time
Thermal resistance:
SOT-23-3L
TO-92S
SOT-89-3L
Maximum Switching
Frequency
Operating temperature
Storage temperature:
-
KHz
Page 6/14
BRP
BHYST
Bo
CH444
BOP
BRP
BHYST
Bo
CH441N
BOP
BRP
BHYST
Bo
CH442N
BOP
BRP
BHYST
Bo
CH443N
BOP
BRP
BHYST
Bo
Cosemitech
CH441/CH442/CH443/CH444
Automotive Product Group
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.
Magnetic release point
Magnetic hysteresis window
|BOP-BRP|
Magnetic offset; BO = (BOP
+ BRP) / 2
TA=-40 C to 150 C
Preliminary Datasheet 1.4
-75
-45
-20 Gauss
TA=-40oC to 150oC
70
90
110
Gauss
TA=-40oC to 150oC
-20
0
20
Gauss
Magnetic operating point
Magnetic release point
Magnetic hysteresis window
|BOP-BRP|
Magnetic offset; BO = (BOP
+ BRP) / 2
TA=-40oC to 150oC
TA=-40oC to 150oC
70
-170
120
-120
170
-70
Gauss
Gauss
TA=-40oC to 150oC
180
240
300
Gauss
TA=-40oC to 150oC
-30
0
30
Gauss
Magnetic operating point
Magnetic release point
Magnetic hysteresis window
|BOP-BRP|
Magnetic offset; BO = (BOP
+ BRP) / 2
TA=-40oC to 150oC
TA=-40oC to 150oC
-36
6
-15
15
-6
36
Gauss
Gauss
TA=-40oC to 150oC
15
30
50
Gauss
TA=-40oC to 150oC
-15
0
15
Gauss
Magnetic operating point
Magnetic release point
Magnetic hysteresis window
|BOP-BRP|
Magnetic offset; BO = (BOP
+ BRP) / 2
TA=-40oC to 150oC
TA=-40oC to 150oC
-50
10
-30
30
-10
50
Gauss
Gauss
TA=-40oC to 150oC
35
60
85
Gauss
TA=-40oC to 150oC
-15
0
15
Gauss
Magnetic operating point
Magnetic release point
Magnetic hysteresis window
|BOP-BRP|
Magnetic offset; BO = (BOP
+ BRP) / 2
TA=-40oC to 150oC
TA=-40oC to 150oC
-75
20
-45
45
-20
75
Gauss
Gauss
TA=-40oC to 150oC
70
90
110
Gauss
TA=-40oC to 150oC
-18
0
18
Gauss
o
o
CH444N
BOP
BRP
Magnetic operating point
TA=-40oC to 150oC
-180 -120
-70 Gauss
o
o
Magnetic release point
TA=-40 C to 150 C
70
120
180 Gauss
Magnetic hysteresis window
BHYST
TA=-40oC to 150oC
180
240
300 Gauss
|BOP-BRP|
Magnetic offset; BO = (BOP
Bo
TA=-40oC to 150oC
-20
0
20
Gauss
+ BRP) / 2
(1) 1 mT = 10 Gauss
(2) Bandwidth describes the fastest changing magnetic field that can be detected and translated to the
output.
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 7/14
Cosemitech
CH441/CH442/CH443/CH444
Automotive Product Group
. 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.
Preliminary Datasheet 1.4
9. Application Information
9.1 Typical Application
It is recommended that an external capacitor C1 is connected to the supply. This can reduce
the noise injected into the device. Normal 0.1uF is suggested.
Typical Application Circuit
9.2 Device Output
If the device is powered on with a magnetic field strength between BRP and BOP, then the
device output is indeterminate and can either be Hi-Z or Low. If the field strength is greater than
BOP, then the output is pulled low. If the field strength is less than BRP, then the output is
released.
9.3 Output Stage
The CH44X output stage uses an open-drain NMOS, and it is rated to sink up to 30 mA of
current. For proper operation, calculate the value of the pullup resistor R1 using Equation 1.
(1)
The size of R1 is a tradeoff between the OUT rise time and the current when OUT is pulled low.
A lower current is generally better, however faster transitions and bandwidth require a smaller
resistor for faster switching. In addition, ensure that the value of R1 > 500 Ω to ensure the output
driver can pull the OUT pin close to GND.
Page 8/14
Cosemitech
CH441/CH442/CH443/CH444
Automotive Product Group
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.
Preliminary Datasheet 1.4
Select a value for C2 based on the system bandwidth specifications as shown in Equation 2.
(2)
Most applications do not require this C2 filtering capacitor.
9.4 Protection Circuits
The CH44X device is fully protected against overcurrent and reverse-supply conditions.
9.5 Overcurrent Protection (OCP)
An analog current-limit circuit limits the current through the FET. The driver current is clamped to
IOCP. During this clamping, the rDS(on) of the output FET is increased from the nominal value.
9.6 Reverse Supply Protection
The CH44X device is protected in the event that the VCC pin and the GND pin are reversed (up
to –22 V).
9.7 Alternative Two-Wire Application
For systems that require minimal wire count, the device output can be connected to VCC
through a resistor, and the total supplied current can be sensed near the controller.
2-Wire Application
Current can be sensed using a shunt resistor or other circuitry.
Page 9/14
Cosemitech
CH441/CH442/CH443/CH444
Automotive Product Group
. 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.
Preliminary Datasheet 1.4
10. Test Conditions
Note: DUT=Device Under Test
Page 10/14
Cosemitech
CH441/CH442/CH443/CH444
Automotive Product Group
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.
Preliminary Datasheet 1.4
11. Package Information:
Page 11/14
Cosemitech
CH441/CH442/CH443/CH444
Automotive Product Group
. 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.
Preliminary Datasheet 1.4
Page 12/14
Cosemitech
CH441/CH442/CH443/CH444
Automotive Product Group
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.
Preliminary Datasheet 1.4
Page 13/14
Cosemitech
CH441/CH442/CH443/CH444
Automotive Product Group
. 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.
Preliminary Datasheet 1.4
Information furnished is believed to be accurate and reliable. However, Cosemitech assumes no
responsibility for the consequences of use of such information nor for any infringement of patents or
other rights of third parties which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Cosemitech. Specification mentioned in this publication
are subject to change without notice. This publication supersedes and replaces all information
previously supplied. Cosemitech products are not authorized for use as critical components in life
support devices or systems without express written approval of Cosemitech.
The Cosemitech logo is a registered trademark of Cosemitech
Page 14/14
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