BU21079F
Capacitive Switch Controller IC

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.

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Product Detail

 
Part Number | BU21079F-E2
Status | Recommended
Package | SOP16
Unit Quantity | 2500
Minimum Package Quantity | 2500
Packing Type | Taping
RoHS | Yes

Specifications:

Vcc(Min.)[V]

3.0

Vcc(Max.)[V]

5.5

Sensor input channels

8

Interface

I2C

Matrix key

4 x 4

Operating Temperature (Min.)[°C]

-25

Operating Temperature (Max.)[°C]

85

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

Design Resources

 

Technical Articles

Schematic Design & Verification

  • Impedance Characteristics of Bypass Capacitor

Thermal Design

  • Thermal Resistance

Tools

2D/3D/CAD

  • SOP16 Footprint / Symbol

Packaging & Quality

Package Information

  • Package Information
  • Anti-Whisker formation

Manufacturing Data

  • Factory Information

Environmental Data

  • UL94 Flame Classifications of Mold Compound
  • Compliance with the ELV directive
  • REACH SVHC Non-use Declaration
  • RoHS Comission Delegated Directive

Export Information

  • The Export Control Order
  • Export Administration Regulations(EAR)