TX254
The TX254 is fabricated from mixed signal CMOS technology. It internally includes an on-chip Hall voltage generator, a voltage regulator for operation with supply voltages of 2.0 to 5.5V, a sleep/awake logic for low power consumption, temperature compensation circuitry, small-signal amplifier, Hall sensor with dynamic offset cancellation system, Schmitt trigger and an open-drain output.
A south pole of sufficient strength will turn the sensor output on. The output will be turned off under no magnetic field. While the magnetic flux density (B) is larger than operating point (Bop), the output will be turned on (low), the output is held until B is lower than release point (Brp), and then turned off.
The total power consumption in normal operation is typically 15μW with a 3.3V power source. Operating temperature range of the TX254 is from -40℃ to 85℃
Features
Micropower consumption
2.0V~5.5V power supply
Chopper stabilized amplifier stage
CMOS/NMOS output
Unipolar Hall Switch
Very High Sensitivity Hall Sensor
Package: SOT23,SOT23-3, 3Pin SIP,SOT553
High ESD protection,HBM>4KV
Applications
Solid State Switch
PDA
Pad PC
Handheld Wireless Handset Awake Switch
Magnet Proximity Sensor for Switch Replacement in Low Duty Cycle Applications
