PCA8885 Capacitive 8-channel touch and proximity sensor with auto-calibration and very low power consumption Rev. 4 13 March 2014 Product data sheet 1. General description The integrated circuit PCA8885 is a capacitive 8-channel touch and proximity sensor that uses a patented (EDISEN) method to detect a change in capacitance on remote sensing plates. Changes in the static capacitances (as opposed to dynamic capacitance changes) are automatically compensated using continuous auto-calibration. Remote sensing plates 1 (for example, conductive foils) can be connected to the IC using coaxial cable. The eight input channels operate independently of each other. There is also a built-in option for a matrix arrangement of the sensors: interrupt generation only when two channels are activated simultaneously, suppression of additional channel outputs when two channels are already active. 2. Features and benefits AEC-Q100 compliant for automotive applications Dynamic touch and proximity sensor with 8 sensor channels Support for matrix arrangement of sensors Sensing plates can be connected remotely Adjustable response time Adjustable sensitivity Continuous auto-calibration Digital processing method Can cope with up to 6 mm of acrylic glass Direct and latching switch modes 2 I C Fast-mode Plus (Fm+) compatible interface 2 Two I C-bus addresses Cascading of two ICs possible 2 Interrupt signaling over I C-bus Interrupt output Large voltage operating range (V = 2.5V to 5.5V) DD Sleep mode (I < 100 nA) DD Low-power battery operation possible (I ~10 A) DD Operating temperature range (T = 40 C to +85 C) amb 1. The definition of the abbreviations and acronyms used in this data sheet can be found in Section 23 on page 39.PCA8885 NXP Semiconductors Capacitive 8-channel touch and proximity sensor with auto-calibration 3. Applications Replacing mechanical switches Hermetically sealed keys on a keyboard Switches for medical applications Switches for use in explosive environments Audio control: on/off, channel, volume Vandal proof switches Switches in or under the upholstery, leather, handles, mats, carpets, tiles, and glass Use of standard metal sanitary parts (for example a tap) as switch Portable communication and entertainment units White goods control panel 4. Ordering information Table 1. Ordering information Type number Package Name Description Version PCA8885TS TSSOP28 plastic small outline package 28 leads PCA8885TS body width 4.4 mm 4.1 Ordering options Table 2. Ordering options Product type number Orderable part number Sales item Delivery form IC (12NC) revision PCA8885TS/Q900/1 PCA8885TS/Q900/1,1 935297377118 tape and reel, 13 inch 1 5. Marking Table 3. Marking codes Product type number Marking code PCA8885TS/Q900/1 PCA8885TS PCA8885 All information provided in this document is subject to legal disclaimers. NXP Semiconductors N.V. 2014. All rights reserved. Product data sheet Rev. 4 13 March 2014 2 of 46