CT511 Series
Unipolar Switch for Consumer &
Industrial Applica ons
Product Descrip on
The CT511 Series is an integrated magne c sensor especially designed for con-
sumer switching applica ons based on Crocus Technology’s patented Magne c
Logic Unit (MLU) technology with integrated CMOS process. The CT511 Series
operates with low power consump on in low magne c fields and large air gaps
with industry leading high frequency performance. The open drain output can
interface with a system voltage up to 6V for added design flexibility.
The CT511 Series provides high sensi vity in a small footprint SOT-23 package
and is cost compe ve for high volume manufacturing. Custom solu ons are
available.
Features and Benefits
High sensi vity
Stable temperature performance
Resistant to mechanical stress
Low power
High frequency performance
Open Drain
Cost-effec ve
RoHS Compliant
Applica on Examples
Door or lid closure detec on
Smart phones, tablets, and laptops
Reed switch replacement
Motor controllers
Proximity detec on
Power switch or open-close detec on
Water, electric, and gas u lity meters
Fluid level detec on
2016 Crocus Technology
Document Number CT511 Series Preliminary Datasheet Rev 0.1
Page 1
CT511 Series
Unipolar Switch for Consumer &
Industrial Applica ons
Table 1: Absolute Maximum Ra ngs
Parameter
Supply Voltage
Supply Current
Opera ng Temp
Storage Temp
Soldering Temp
Magne c Flux Density
ESD Level (HBM)
Symbol
Vcc
Idd
Ta
Ts
T
B
Vesd
Min
Max
7
15
Unit
V
mA
o
o
o
-40
85
150
260
1
C
C
C
T
V
4,000
Table 2: Electrical Characteris cs for CT511VA Series
Supply Voltage = 3.0V, System Voltage (V
SYS
) up to 6V, Ta = 25C unless otherwise specified.
Characteris c
Opera ng Temperature
Supply Voltage
Output Voltage High
Output Voltage Low
Ac ve Mode Current
Sleep Mode Current
Average Current
Switching Frequency
Awake Mode Time
Standby Mode Time
Duty Cycle
Vcc
V
SYSH
V
SYSL
Ion
Istb
Iavg
Fsw
Taw
Tstb
DC
300
20
80
43
0.2
Symbol
Min
-40
2.7
Typ
25
3.0
0.7Vsys
0.3Vsys
Max
85
3.3
Unit
o
C
V
V
V
80
170
uA
nA
nA
Hz
uS
mS
%
2016 Crocus Technology
Document Number CT511 Series Preliminary Datasheet Rev 0.1
Page 2
CT511 Series
Unipolar Switch for Consumer &
Industrial Applica ons
Table 3: Electrical Characteris cs for CT511VB Series
Supply Voltage = 3.0V, System Voltage (V
SYS
) up to 6V, Ta = 25C unless otherwise specified.
Characteris c
Opera ng Temperature
Supply Voltage
Output Voltage High
Output Voltage Low
Ac ve Mode Current
Sleep Mode Current
Average Current
Switching Frequency
Awake Mode Time
Standby Mode Time
Duty Cycle
Vcc
V
SYSH
V
SYSL
Ion
Istb
Iavg
Fsw
Taw
Tstb
DC
2
300
80
3.5
2.2
Symbol
Min
-40
2.7
Typ
25
3.0
0.7Vsys
0.3Vsys
Max
85
3.3
Unit
o
C
V
V
V
80
170
uA
nA
uA
Hz
uS
mS
%
Table 4: Electrical Characteris cs for CT511VC Series
Supply Voltage = 3.0V, System Voltage (V
SYS
) up to 6V, Ta = 25C unless otherwise specified.
Characteris c
Opera ng Temperature
Supply Voltage
Output Voltage High
Output Voltage Low
Ac ve Mode Current
Sleep Mode Current
Average Current
Switching Frequency
Awake Mode Time
Standby Mode Time
Duty Cycle
Vcc
V
SYSH
V
SYSL
Ion
Istb
Iavg
Fsw
Taw
Tstb
DC
20
1.5
80
240
25
Symbol
Min
-40
2.7
Typ
25
3.0
0.7Vsys
0.3Vsys
Max
85
3.3
Unit
o
C
V
V
V
80
170
uA
nA
uA
KHz
uS
uS
%
2016 Crocus Technology
Document Number CT511 Series Preliminary Datasheet Rev 0.1
Page 3
CT511 Series
Unipolar Switch for Consumer &
Industrial Applica ons
Table 5: Magne c Characteris cs
Supply Voltage = 3.0V
Characteris c
Operate Point
Release point
Hysteresis
Symbol
B
OP
B
RP
B
HYS
Condi ons
Ta = -40C to 85C
Ta = -40C to 85C
B
OP
- B
RP
, Ta = -40C to 85C
Min
Typ
25
15
10
Max
Unit
Gauss
Gauss
Gauss
Figure 1: Magne c Flux
Output OFF
Switch to High
Switch to Low
V
OUT
Output ON
B
RP
B
HYS
B
OP
B+
Table 6: Output Behavior versus Magne c Field
Characteris c
South Pole
Null or weak magne c field
North Pole
Condi ons
B > B
OP
B < B
RP
B > B
OP
Output
Low
High
High
2016 Crocus Technology
Document Number CT511 Series Preliminary Datasheet Rev 0.1
Page 4
CT511 Series
Unipolar Switch for Consumer &
Industrial Applica ons
Figure 2: CT512 Series Digital Func onal Block Diagram
VCC
VOUT
GND
GND
VCC
VOUT
2016 Crocus Technology
Document Number CT511 Series Preliminary Datasheet Rev 0.1
Page 5
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