Description
The AH1804 is a micropower Omnipolar Hall effect switch IC with a single output driver with internal pull up and pull down capability. Designed for portable and battery powered equipment such as cellular phones and portable PCs the average supply current is only 12µA at 3.3V. To support battery powered equipment the AH1804 can operate over the supply range of 2.5V to 3.6V and uses a hibernating clocking system to minimize the power consumption.

Features
• Omnipolar operation (North or South pole)
• Low supply voltage 2.5V to 3.6V
• Micropower operation
• No external pull up resistors required
• Chopper stabilized design
   o Superior temperature stability
   o Extremely Low Switch-Point Drift
   o Insensitive to Physical Stress
• Good RF noise immunity
• -40°C to 85°C operating temperature
• Small low profile DFN1216-4 and SC59 packages
• ESD (HBM) ＞ 5KV
• “Green” Molding Compound

Applications
• Cover switch in clam-shell and slide cellular phones
• Cover switch in portable PC’s, Tablets and PDA
• Display screen open/close detect in Digital camcorders
• Contact-less switch in portable battery powered consumer and industrial products