CT83x Series
Omnipolar Digital TMR
Latch/Sensor for Consumer
& Industrial Applications
Product Description
The CT83x Series of integrated omnipolar magnetic latches and analog sensor
are designed for consumer and industrial switching applications. It is based on
Crocus Technology’s patented Magnetic Logic Unit™ (MLU™) technology with
integrated CMOS process to provide a monolithic solution for superior sensing
performance.
SOT-23 Package
This series of magnetic latches feature an industry leading low power consump-
tion as low as 200 nA. They are capable of handling large air gap applications
with low magnetic fields down to 0.9 mT with best in class high frequency perfor-
mance. The CT83x is offered in active-low push-pull CMOS and open drain con-
figuration for design flexibility. The latches are available in a low profile and small
form factor 4-lead LGA and 3-lead SOT-23 packages, providing cost effective and
space-saving solutions for high volume manufacturing. Please contact factory for
custom solutions.
1.40 x 1.40 x 0.44 mm LGA
Features and Benefits
•
High sensitivity, B
OP
as low as 0.9 mT
Application Examples
•
IoT devices
•
•
•
•
•
Resistant to mechanical stress
Ultra-low power consumption as low as 200 nA
Digital CMOS push-pull and open drain options
Low profile and small form factor packaging
RoHS Compliant
•
•
•
•
•
•
•
•
Smartphones, tablets, and laptops
Door or lid closure detection
Reed switch replacement
Motor controllers
Proximity detection
Power switch or open-close detection
Tamper-proofing for utility meters
Fluid level detection
2018 Crocus Technology
Document Number CT83x Series Datasheet Rev 1.0
Page 1
CT83x Series
Omnipolar Digital TMR
Latch/Sensor for Consumer
& Industrial Applications
Figure 1: CT83x Block Diagrams
CT83x (SOT23 Package) Block Diagram
VDD
1
MLU
Analog
Front-End
State
Machine
Open
Drain/
Push-pull
Output
2
OUT
UVLO
Biases
Oscillator
3
GND
CT834 (SOT23 Package) Block Diagram
VDD
1
MLU
Analog
Front-End
State
Machine
Analog
Output
2
ANA
UVLO
Biases
Oscillator
3
GND
2018 Crocus Technology
Document Number CT83x Series Datasheet Rev 1.0
Page 2
CT83x Series
Omnipolar Digital TMR
Latch/Sensor for Consumer
& Industrial Applications
Figure 2: Package Pin-out with Axis of Sensitivity Diagrams
GND
GND
B+
B-
Axis of Sensitivity
B+
B-
Axis of Sensitivity
VDD
OUT
VDD
ANA
SOT-23 Package for
CT83x
SOT-23 Package for CT834DR-IS3
GND
4
B-
Axis of
Sensitivity
B+
3
OUT
GND
4
B-
Axis of
Sensitivity
B+
3
N/C
N/C
1
2
VDD
ANA
1
2
VDD
LGA Package for CT832
LGA Package for CT834DR-IL1
Table 1: Pin-out Information
Pin # for SOT23
Package
CT831/2/4
1
2
Pin # for LGA
Package
CT832BV, CT834
2
3
Pin Name
Pin Description
VDD
OUT
ANA
N/C
Supply Voltage
Output Signal (Active LOW) for CT83x.
Analog Output for CT834 in SOT23 Package
No Connect for CT834 in LGA Package.
Ground
Analog Output for CT834. No Connect for CT832.
3
-
4
1
GND
ANA (or N/C)
2018 Crocus Technology
Document Number CT83x Series Datasheet Rev 1.0
Page 3
CT83x Series
Omnipolar Digital TMR
Latch/Sensor for Consumer
& Industrial Applications
Table 2: 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.
Parameter
Supply Voltage
Push-pull Output (Active LOW)
Open Drain Output Voltage (Active LOW)
Analog Output
Input and Output Current
Junction temperature
Storage temperature
Soldering temperature
ESD Level, Human Body Model per JESD22-A114
Symbol
V
DD
V
OUT_PP
V
OUT_OD
V
ANA
I
IN
/ I
OUT
T
J
T
STG
T
SOL
V
ESD_HBM
Min
-0.3
-0.3
-0.3
-0.3
-10
-40
-65
Max
4.0
V
DD
+ 0.3
5.5
V
DD
+ 0.3
+10
+125
+150
+260
Unit
V
V
V
V
mA
°C
°C
°C
kV
±4.0
Table 3: Recommended Operating Conditions
The Recommended Operating Conditions table defines the conditions for the actual device operation. Recommend-
ed operating conditions are specified to ensure optimal performance to the data sheet specifications. Crocus Tech-
nology does not recommend exceeding them or designing to absolute maximum ratings.
Parameter
Supply Voltage
Output Voltage
Operating Magnetic Flux
Ambient Temperature
Junction Temperature
Symbol Conditions
V
DD
V
OUT
B
T
A
T
J
Min
2.7
Typ
3.0
Max
3.6
3.6
12
Unit
V
V
mT
°C
°C
-40
-40
+25
+125
+125
Table 4: Thermal Properties
Junction-to-ambient thermal resistance is a function of application and board layout and is determined in accord-
ance to JEDEC standard JESD51 for a four (4) layer 2s2p FR-4 printed circuit board (PCB). Special attention must
be paid not to exceed junction temperature T
J(MAX)
at a given ambient temperature.
Parameter
Junction-to-Ambient Thermal Resistance for SOT23 Package
Junction-to-Ambient Thermal Resistance for LGA Package
Symbol
JA(SOT23)
JA(LGA)
Min
Typ
202
165
Max
Unit
°C/W
°C/W
2018 Crocus Technology
Document Number CT83x Series Datasheet Rev 1.0
Page 4
CT83x Series
Omnipolar Digital TMR
Latch/Sensor for Consumer
& Industrial Applications
Table 5: Electrical Characteristics for CT83x Series
Unless otherwise specified: V
DD
= 2.7 V to 3.6 V, T
A
=
-40°C
to +125°C. Typical values are V
DD
= 3.0 V and T
A
= +25°C.
Parameter
Power-On Time
Under-voltage Lockout Threshold,
Rising V
DD
Under-voltage Lockout Threshold,
Falling V
DD
Under-voltage Lockout Hysteresis
Push-Pull Output
Output Voltage High OUT
Output Voltage Low OUT
Current for OUT
Open Drain Output
High Level Output Voltage
Low Level Output Voltage
High Impedance Output Leakage
Current
(1)
Symbol Conditions
t
ON
V
UVLO_RISE
V
UVLO_FALL
V
UV_HYST
V
DD
> 2.7 V
Rising V
DD
Falling V
DD
Min
Typ
500
2.20
Max
Unit
µs
2.60
V
V
mV
1.90
2.15
50
V
OH
V
OL
I
OUT
I
OUT
=
-2
mA
I
OUT
= +2 mA
0.9
V
DD
0.1
V
DD
±2
V
V
mA
V
OH
V
OL
I
LEAK
I
OUT
≤ 20
mA
V
OH
= 5.5 V, B = 0
0
20
5.5
0.5
V
V
pA
(1) Guaranteed by design and bench characterization.
Typical Timing Characteristics for CT83x
V
DD
= 3.0 V and T
A
= +25°C, C
DD
= 1.0 µF (unless otherwise specified).
Figure 3.
Power-On Time for Push-pull Output (V
DD
and OUT)
2018 Crocus Technology
Document Number CT83x Series Datasheet Rev 1.0
Figure 4.
Power-On Time for Open Drain Output (V
DD
and OUT)
Page 5
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