General Description:The OH9248 is an ultra-sensitive Hall-effect switch with
digital latched output, mainly designed for battery-operation, hand-held
equipments. Special CMOS process is used for low-voltage and low-power
requirement. A chopper stabilized amplifier improves stability of ic switch
points. A sleep-awake logic controls the IC in sleep time or awake time. This function will
reduce the average operating current of the IC. During the awake time, the output is
changed with the ic flux density. During the sleep time, the output is latched in its
previous state and the current consumption will reduce to some μA. The IC switching
behaviour is omnipolar, either north or south pole sufficient strength will turn the output on.
If the ic flux density is larger than operating point (BOP), the output will be turned
on; if it is less than releasing point (BRP), the output will be turned off.
Features
• Micropower Operation
• 2.5 to 5.5V Power Supply
• Switching for Both Poles of a (Omnipolar)
• Stabilized Chopper
• Superior Temperature Stability
• Digital Output Signal
Applications
• Cover Switch in Notebook PC/PDA
• Handheld Wireless Application Awake Switch
• Switch in Low Duty Cycle
Absolute Maximum Ratings （TA=25℃）
Supply Voltage ·············· 7 V
Supply Current (Fault) ··············6 mA
Output Voltage VOUT ··············7 V
Output Current IOUT ··············2 mA
ic Flux Density B ·············Unlimited
Storage Temperature ·············-55 to 150 °C
Junction Temperature ············150 °C
ESD (Machine Model) ············ESD 200 V
