IST8508

SOT23-3 package
VDD = 2.5 – 5.5 V
Operating temperature: –40 °C to 85 °C
Logic Low Output 

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IST8508 is a high-speed, 3D omni-polar magnetic switch IC designed for industrial-grade magnetic sensing applications such as flow metering, tamper detection, and non-contact position sensing. It integrates advanced AMR (Anisotropic Magnetoresistive) and Hall-effect sensors to detect magnetic fields in all three spatial axes (X, Y, and Z).

The IST8508 supports programmable magnetic operate and release thresholds as low as ±13 G, offering high sensitivity and low hysteresis for reliable detection. With a maximum magnetic sampling rate of 24 kHz, the device is well suited for high-speed applications such as turbine flowmeters and rotating machinery.

Additional features include one-time programmable (OTP) settings for output polarity, data rate, threshold levels, and axis selection. The device is housed in a compact SOT23-3 package, operates from –40 °C to 85 °C, and requires only a single MLCC capacitor for operation, minimizing overall system BOM and footprint.

Features

• 3D omnipolar magnetic detection
• High-speed switching up to 24 kHz
• Active-low digital output with level-triggered logic
• Low hysteresis and programmable BOP/BRP thresholds
• Push-pull or open-drain output configuration
• Inverting output mode available
• Chopper-stabilized amplifiers for low offset and thermal drift
• Minimal external components required (single MLCC capacitor)

Block Diagram

Applications

• Water and gas meter flow sensing
• Tamper detection in smart electricity meters
• Non-contact position and lid detection for industrial enclosures
• Proximity sensing in industrial automation systems
• Magnetic switch replacement for reed sensors in harsh environments
• Speed or rotation detection in motor control and metering systems
• Magnetic event detection in industrial safety and control panels