Cosemitech
Automotive Product Group
FEATURES and FUNCTIONAL DIAGRAM
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CH441/CH442/CH443/CH444
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
PACKAGE
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
o
C
Small package sizes TO-92S, SOT-23 and SOT-89
RoHS-compliant material meets directive 2011/65/EU
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 stress-
resistant 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
Automotive Product Group
CH441/CH442/CH443/CH444
. 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
Automotive Product Group
1. Product Family Members
Part Number
CH441SR
CH441TB
CH441ER
CH442SR
CH442TB
CH442ER
CH443SR
CH443TB
CH443ER
CH444SR
CH444TB
CH444ER
CH441NSR
CH441NTB
CH441NER
CH442NSR
CH442NTB
CH442NER
CH443NSR
CH443NTB
CH443NER
CH444NSR
CH444NTB
CH444NER
Marking ID
C441
C441
C441
C442
C442
C442
C443
C443
C443
C444
C444
C444
441N
441N
441N
442N
442N
442N
443N
443N
443N
444N
444N
444N
CH441/CH442/CH443/CH444
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
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
Automotive Product Group
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
CH441/CH442/CH443/CH444
. 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
Function
Supply Voltage pin
Open Collector Output pin
Ground pin
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
-
-22
-
-0.3
-
-40
-50
-50
Max
24
20
24
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.
4. ESD Protections
Parameter
All pins
1)
All pins
2)
All pins
3)
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
Value
+/-8000
+/-200
+/-750
Unit
V
V
V
Page 4/14
Cosemitech
Automotive Product Group
5. Function Description
CH441/CH442/CH443/CH444
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
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
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