Features and Benefits

 Tunneling Magnetoresistance (TMR) Technology

 Operation with North or South Pole

 Low Operate Points for High Sensitivity

 Very Low Power Consumption

 Compatible with a Wide Range of Supply Voltages

 Excellent Thermal Stability

 High-Speed Detection and High Frequency Response

 High ESD Tolerance

Applications

 Utility Meters including

Water, Gas, and Heat Meters

 Solid State Switching

 Speed Sensing

 Rotary Position Sensing

 Linear Displacement Sensing

General Description

The MMS201H is a digital omnipolar magnetic switch that integrates TMR and CMOS

technology in order to provide a magnetically triggered digital switch with high sensitivity, high

speed, and low power consumption. It integrates a push-pull half-bridge TMR magnetic sensor and

CMOS signal processing circuitry within the same package. Designed for use in high accuracy

applications, this device includes an on-chip TMR voltage generator for precise magnetic sensing,

TMR voltage amplifier and comparator, a Schmitt trigger to provide switching hysteresis for noise

rejection, and CMOS push-pull output. An internal band gap regulator is used to provide

temperature compensated supply voltage for internal circuits, and it allows a wide range of

operating supply voltages. The MMS201H features accurate switching points, fast response, a wide

operating temperature range, and excellent ESD immunity. It is available in two packaging form

factors: SOT23-3 (P/N MMS201HS), or TO-92S (P/N MMS201HT).