1. General description
The integrated circuit PCF8883 is a capacitive touch and proximity switch that uses a
patented (EDISEN) digital method to detect a change in capacitance on a remote sensing
plate. Changes in the static capacitance (as opposed to dynamic capacitance changes)
are automatically compensated using continuous auto-calibration. Remote sensing plates
(e.g. conductive foil) can be connected directly to the IC1 or remotely using a coaxial
cable.
2. Features and benefits
 Dynamic proximity switch
 Digital processing method
 Adjustable sensitivity, can be made very high
 Adjustable response time
 Wide input capacitance range (10 pF to 60 pF)
 Automatic calibration
 A large distance (several meters) between the sensing plate and the IC is possible
 Open-drain output (P-type MOSFET, external load between pin and ground)
 Designed for battery powered applications (IDD = 3 A, typical)
 Output configurable as push-button, toggle, or pulse
 Wide voltage operating range (VDD = 3 V to 9 V)
 Large temperature operating range (Tamb = 40 C to +85 C)
 Internal voltage regulator
 Available in SOIC8 and wafer level chip-size package
3. Applications
 Proximity detection
 Proximity sensing in
 Mobile phones
 Portable entertainment units
 Switch for medical applications
 Switch for use in explosive environments
 Vandal proof switches
 Transportation: Switches in or under upholstery, leather, handles, mats, and glass
 Buildings: switch in or under carpets, glass, or tiles
 Sanitary applications: use of standard metal sanitary parts (e.g. tap) as switch
 Hermetically sealed keys on a keyboard