Digital TMR Latch

CT81xx Digital TMR Latch/Analog TMR Sensor

The CT81xx is a product family of Tunnel Magneto-resistance (TMR) digital latches and analog sensors that 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 CT81xx series of magnetic sensors offer stable magnetic operation over the operating temperature range.

With very high sensitivity, the CT81xx products enable larger air gaps or smaller size/lower cost magnets to be used in systems while also drawing supply current as low as 110 nA.  As such, these magnetic sensors are ideal for battery-operated products where minimal current consumption is required.  The outputs for both the digital latches and analog sensors are ratio-metric which provide greater design flexibility when interfacing with a variety of microcontrollers.

Available in an industry standard 3-lead SOT23, 5-lead SOT23 and small form factor 4-lead LGA packages to support both consumer and industrial applications.

Features

  • High Sensitivity: BOP/BRP = ±0.9 mT/±0.5 mT
  • Sensor Polarity
    • Omnipolar – CT813x & CT815x
    • Bipolar – CT812x
    • Unipolar – CT811x
  • Current Consumption: as Low as 110 nA @ VDD = 1.8 V and fS = 2 Hz
  • Digital CMOS Outputs:
    • Push-pull
    • Open Drain
  • Supply Voltage: 1.7 V to 5.5 V
  • Under Voltage Lock-out (UVLO)
  • Low Profile and Small Form Factor Packages that are ROHS and Green Compliant:
    • 3-lead SOT23
    • 5-lead SOT23
    • 4-lead LGA, 1.45 x 45 x 0.44 mm

Applications

  • Window and Door Sensors
  • Reed Switch Replacement
  • Motor Controllers
  • Tamper-proofing for Utility Meters
  • Proximity Detection
  • Wearable Medical Devices
  • White Goods
  • Fluid Level Detection
  • IoT Devices
  • Smartphones, Tablets and Laptops

Omnipolar Digital Latches

Part Number Operating Temperature Range Sensor Type Output BOP
(mT)
BRP
(mT)
fS Package
CT8131BV-IL4 -40°C to +85°C Omnipolar Open Drain ±3.0 ±2.0 2 Hz 4-lead LGA
CT8131BV-HL4 -40°C to +125°C
CT8131BV-IS3 -40°C to +85°C Omnipolar Open Drain ±3.0 ±2.0 2 Hz 3-lead SOT23
CT8131BV-HS3 -40°C to +125°C
CT8132BH-IS3 -40°C to +85°C Omnipolar Push-pull ±3.0 ±2.0 10 kHz 3-lead SOT23
CT8132BH-HS3 -40°C to +125°C
CT8132BL-IS3 -40°C to +85°C Omnipolar Push-pull ±3.0 ±2.0 250 Hz 3-lead SOT23
CT8132BL-HS3 -40°C to +125°C
CT8132BV-IL4 -40°C to +85°C Omnipolar Push-pull ±3.0 ±2.0 2 Hz 4-lead LGA
CT8132BV-HL4 -40°C to +125°C
CT8132BV-IS3 -40°C to +85°C Omnipolar Push-pull ±3.0 ±2.0 2 Hz 3-lead SOT23
CT8132BV-HS3 -40°C to +125°C
CT8132DM-IS3 -40°C to +85°C Omnipolar Push-pull ±1.5 ±1.0 2.5 kHz 3-lead SOT23
CT8132DM-HS3 -40°C to +125°C
CT8132EK-IS3 -40°C to +85°C Omnipolar Push-pull ±7.0 ±5.0 10 Hz 3-lead SOT23
CT8132EK-HS3 -40°C to +125°C
CT8132SK-IL4 -40°C to +85°C Omnipolar Push-pull ±0.9 ±0.5 10 Hz 4-lead LGA
CT8132SK-HL4 -40°C to +125°C
CT8132SK-IS3 -40°C to +85°C Omnipolar Push-pull ±0.9 ±0.5 10 Hz 3-lead SOT23
CT8132SK-HS3 -40°C to +125°C
CT8132SL-IS3 -40°C to +85°C Omnipolar Push-pull ±0.9 ±0.5 250 Hz 3-lead SOT23

Bipolar Digital Latches

Part Number Operating Temperature Range Sensor Type Output BOP
(mT)
BRP
(mT)
fS Package
CT8122AN-IS3 -40°C to +85°C Bipolar Push-pull 1.0 -1.0 500 Hz 3-lead SOT23
CT8122AN-HS3 -40°C to +125°C
CT8122AM-IS3 -40°C to +85°C Bipolar Push-pull 1.0 -1.0 2.5 kHz 3-lead SOT23
CT8122AM-HS3 -40°C to +125°C

Unipolar Digital Latches

Part Number Operating Temperature Range Sensor Type Output BOP
(mT)
BRP
(mT)
fS Package
CT8111BK-IS3 -40°C to +85°C Unipolar Open Drain 3.0 2.0 10 Hz 3-lead SOT23
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
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
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
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
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
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
CT8112DT-HS3 -40°C to +125°C

Omnipolar Analog Sensors

Part Number Operating Temperature Range Sensor Type Analog Output Digital
(BOP/BRP)
S
(mV/V/mT)
Range
(mT)
Package
CT8150PC-IS3 -40°C to +85°C Omnipolar Yes No 50 ±8.0 3-lead SOT23
CT8150PC-HS3 -40°C to +125°C
CT8150PC-IL4 -40°C to +85°C Omnipolar Yes No 50 ±8.0 4-lead LGA
CT8150PC-HL4 -40°C to +125°C
CT8152PC-IS5 -40°C to +85°C Omnipolar Yes Yes
(±6.0 mT/±4.0 mT)
50 ±8.0 5-lead SOT23
CT8152PC-HS5 -40°C to +125°C
CT8152PC-IL4 -40°C to +85°C Omnipolar Yes Yes
(±6.0 mT/±4.0 mT)
50 ±8.0 4-lead LGA
CT8152PC-HL4 -40°C to +125°C

Not Recommended for New Designs

CT8xx: Digital TMR Latch/Analog TMR Sensor

The CT8xx series of integrated TMR latches and analog sensor are designed for consumer and industrial applications. This family of products are available in unipolar, bipolar and omnipolar configurations and can either support open drain or push-pull digital outputs. It is based on Crocus’ patented Magnetic Logic Unit™ (MLU™) technology and integrated with CMOS functionality to provide a complete solution.
With very high sensitivity, the CT8xx products enable larger air gaps or smaller size/lower cost magnets to be used in systems while also drawing supply current as low as 200 nA. Available in an industry stand 3-lead SOT23 and small form factor 4-lead LGA packages to support both consumer and industrial applications.

Features

  • High Sensitivity: BOP/BRP = ±0.9 mT/±0.5 mT
  • Low Current Consumption as Low as 200 nA
  • Digital CMOS Outputs:
    • Push-pull
    • Open Drain
  • Supply Voltage: 2.7 V to 3.6 V
  • Resistant to Mechanical Stress
  • Low Profile and Small Form Factor Packages that are ROHS and Green Compliant:
    • 3-lead STO23 << Change to 3-lead SOT23
    • 4-lead LGA, 1.40 x 40 x 0.44 mm

Applications

  • Window and Door Sensors
  • Reed Switch Replacement
  • Motor Controllers
  • Tamper-proofing for Utility Meters
  • Proximity Detection
  • Wearable Medical Devices
  • White Goods
  • Fluid Level Detection
  • IoT Devices
  • Smartphones, Tablets and Laptops

Crocus Technology: Intelligence in Sensing™