CH913

DESCRIPTION

The CH913/CH913L is a high-sensitivity extremely temperature-stable micro-power Omnipolar Hall 

effect switch IC with internal pull down capability. Designed for portable and battery powered consumer 

equipment such as cellular phones and portable PCs to office equipment, home appliances and industrial 

applications, the average supply current is only 1.62μA at 3.3V for CH913 and 0.92uA at 3.3V for CH913L. 

To support potable equipment the CH913/CH913L can operate over the supply range of 1.8V to 5.5V and 

uses a hibernating clocking system to minimize the power consumption. 

The device includes a clocking system, a Hall-voltage generator, a small-signal amplifier, a chopper 

stabilization, two Schmitt trigger, and an output driver controller. 

The output is activated with either a north or south pole of sufficient magnetic field strength. When the 

magnetic flux density (B) perpendicular to the package is larger than operate point (Bop), the output will be 

turned on (pulled low) and held until B is lower than release point (Brp).

Two package styles provide a magnetically optimized package for most applications, SO-T23 and TO92S. Each package type is lead (Pb) free (suffix, –T), with a 100% matte-tin-plated leadframe.

APPLICATIONS

-Open and Close Detect for 

Flip/Slide Cellular Phones；

-Smart Cover or Dock Detect 

for Cellular Phones and 

Tablet PCs; 

-Cover or Display Switch in 

Portable PCs (eg: Ultrabook); 

Digital Still, Video Cameras 

and Handheld Gaming 

Consoles；

-Door, Lids and Tray Position 

Switches；

-Level, Proximity and Position 

Switches；

-Contact-Less Switches in 

Home Appliances and 

Industrial Applications.

FEATURES

• Micro-power Omnipolar-Switch Hall Sensor

• Multiple Sensitivity Options (BOP / BRP):

±35 / ±25 Gauss;

• Open Drain output ability

• Chopper stabilized design provides:

- Superior temperature stability

- Minimal switch point drift

- Enhanced immunity to physical stress

• On board voltage regulator for 1.8V to 5.5V range

• Open Drain Output (1 mA Sink)

• Solid-state reliability

• Wide Operating temperature range: -40 to 150 oC

• Small package sizes TO-92S, SOT-23

• RoHS-compliant material meets directive 2011/65/EU