CH464A/AN

DESCRIPTION

The CH464A and CH464AN are small, versatile digital Hall effect devices that are operated by the 

magnetic field from a permanent magnet or an electromagnet, designed to respond to alternating North 

and South poles.

These bipolar latching sensor ICs have enhanced sensitivity, which often allows for the use of less 

expensive magnets.

These sensor ICs are available in two package styles, the CH464AS/CH464ANS in the subminiature 

SOT-23-3L surface mount package and the CH464AT/CH464ANT in the leaded, flat TO-92S package.

The CH464AS/CH464ANS’s small size requires less PC board space, allowing it to be used in smaller

assemblies. Its 3V capability allows for use in low voltage applications, promoting energy efficiency.

The CH464AS/CH464ANS is available on tape and reel; the CH464AT/CH464ANT is available in a bulk 

package (1000 units per bag).

APPLICATIONS

Transportation

- Speed and RPM 

(revolutions per minute) 

sensing

- Tachometer, counter pickup

- Motor and fan control

- Electric window lift

- Convertible roof position

- Automotive transmission 

position

Industrial

- Speed and RPM sensing

- Tachometer, counter pickup

- Flow-rate sensing

- Brushless dc (direct 

current) motor commutation

- Motor and fan control

- Robotics control

Medical

- Motor assemblies

- Medication dispense control

FEATURES

• Enhanced sensitivity: will operate from only 45 Gauss typical, 

at 25°C allowing the use of smaller, potentially lower-cost 

magnets or wider air gaps

• Output current limitation function, provide higher inrush current 

protection

• Subminiature, SOT-23-3L surface mount package (CH464AS/ 

CH464ANS) supplied on tape and reel allows for a compact 

design with automated component placement, helping to 

reduce manufacturing costs

• Small, leaded, flat, TO-92S package (CH464AT/CH464ANT) 

allows for a compact PCB layout

• Bipolar latching magnetics respond to alternating North and 

South poles, making these products well-suited for accurate 

speed sensing and RPM (revolutions per minute) 

measurement

• Wide operating voltage range of 3.8V to 30V makes these 

sensors useable in a wide range of applications

• Built-in inductance freewheeling diode, with the OUT terminal 

high voltage discharge capability enhances the protection of 

the sensor and the circuits with which it is used

• Robust design: will operate up to 150 °C

• RoHS-compliant material meets directive 2002/95