January 2021
© 2021 Crocus Technology 1
CT811x · Rev. 1.0
CT811x
Integrated Unipolar TMR Digital Latches
Features
• Sensitivity with B
OP
as Low as 1.5 mT
• Ultra-low Power Consumption: ∼145 nA @ V
DD
= 1.8 V
and f
S
= 10 Hz
• Supply Voltage Range: 1.7 V to 5.5 V
• Sensor Polarity: Unipolar
• Digital CMOS Outputs:
o Push-pull
o Open Drain
• Under-Voltage Lockout (UVLO)
• 3-Lead SOT23 Package
Product Description
The CT811x series of unipolar Tunnel Magneto-resistance
(TMR) digital latches
are designed for consumer and
industrial applications. They are
based on Crocus
Technology’s patented XtremeSense® TMR technology
with integrated CMOS process to provide a monolithic
solution for superior sensing performance.
The CT811x
digital latches of
fer stable magnetic operation over the
operating temperature range.
This product family has very low power consumption as low
as 145 nA which is ideal for battery-
operated products
where minimal current consumption is required. It supports
magnetic fields down to 1.5 mT for applications where there
is a large air gap requirement.
The CT811x is available in in an industry standard 3-lead
SOT-23 package to support high volume manufacturing for
industrial markets.
Applications
• IoT Devices
• Door or Lid Closure
• Reed Switch Replacement
• Tamper-proofing for Utility Smart Meters
• Fluid Level Sensing/Detection
• Proximity Detection
• Motor Controllers
• Gimbals for Camera Systems in Drones/UAVs
• Industrial Machinery/Robots
• Medical Devices
CT811x www.crocus-technology.com
© 2021 Crocus Technology 2
CT811x · Rev. 1.0
Ordering Information
Part Number
Operating
Temperature
Range
Sensor
Type
Output
B
OP
(mT)
B
RP
(mT)
f
S
Package
Packing
Method
CT8111BK-IS3 -40°C to +85°C
Unipolar
Open
Drain
+3.0 +2.0 10 Hz
3-lead
SOT23
Tape & Reel
CT8111BK-HS3 -40°C to +125°C
CT8111BH-IS3 -40°C to +85°C
Unipolar
Open
Drain
+3.0 +2.0 10 kHz
3-lead
SOT23
Tape & Reel
CT8111BH-HS3 -40°C to +125°C
CT8111DK-IS3 -40°C to +85°C
Unipolar
Open
Drain
+1.5 +1.0 10 Hz
3-lead
SOT23
Tape & Reel
CT8111DK-HS3 -40°C to +125°C
CT8111DT-IS3 -40°C to +85°C
Unipolar
Open
Drain
+1.5 +1.0 20 Hz
3-lead
SOT23
Tape & Reel
CT8111DT-HS3 -40°C to +125°C
CT8112BK-IS3 -40°C to +85°C
Unipolar Push-pull +3.0 +2.0 10 Hz
3-lead
SOT23
Tape & Reel
CT8112BK-HS3 -40°C to +125°C
CT8112DK-IS3 -40°C to +85°C
Unipolar Push-pull +1.5 +1.0 10 Hz
3-lead
SOT23
Tape & Reel
CT8112DK-HS3 -40°C to +125°C
CT8112DT-IS3 -40°C to +85°C
Unipolar Push-pull +1.5 +1.0 20 Hz
3-lead
SOT23
Tape & Reel
CT8112DT-HS3 -40°C to +125°C