BU21079F

Capacitive Controller ICs Capacitive Switch Controller ICs BU21079F General Description BU21079F is a capacitive switch controller used for operating switches. Low power consumption is achieved using the intermittent operation mode. In addition to a regular simple switch, it supports matrix switches which are arranged in the matrix sensors. If external noise and temperature drift are detected, the automatic self-calibration is activated. Features ■ 8 capacitive sensor ports ■ Supports matrix switches. Maximum of 16 switches. ■ Automatic self-calibration ■ Continued touch detection ■ Sends an interrupt when there is a detected result of switch operation ■ 2-wire serial bus interface ■ 3.3V or 5.0V single power supply ■ Built-in Power-On-Reset and Oscillator Applications ■ Electronic devices with multiple switches. ■ Information appliances such as printers. ■ AV appliances such as digital TV and HDD recorder. ■ Notebook PC. ■ Air-conditioner. Refrigerator. Electrical rice cooker. Typical Application Circuit Key Specifications ■ Input voltage range ■ Operating temperature range ■ Operating current ■ Detect cycle Packages BU21079F : 3.0V to 5.5V -25℃ to 85℃ 2.5mA (Typ) 6msec (Typ) SOP16 10.00 ㎜×6.20 ㎜×1.71 ㎜ 4.7kΩ Figure 1. Typical Application Circuit ○Product structure：Silicon monolithic integrated circuit ○This product has no designed protection against radioactive rays www.rohm.com TSZ02201-0Y1Y0FZ00150-1-2 © 2013 ROHM Co., Ltd. All rights reserved. 1/34 2013.09.25 Rev.00...