BU21078FV
Capacitive Switch Controller IC

BU21078FV　is a capacitive sensor controller for switch operation.　In addition to a regular simple switch, support matrix　switches which are arranged in the matrix sensors. If　external noise and temperature drift are detected, the　automatic self-calibration is operated.　Include LED controller with PWM function.

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Product Detail

 
Part Number | BU21078FV-E2
Status | Recommended
Package | SSOP-B28
Unit Quantity | 2000
Minimum Package Quantity | 2000
Packing Type | Taping
RoHS | Yes

Specifications:

Vcc(Min.)[V]

3.0

Vcc(Max.)[V]

5.5

Sensor input channels

12

LED control channels

8

Interface

I2C

Matrix key

6 x 6

Operating Temperature (Min.)[°C]

-20

Operating Temperature (Max.)[°C]

85

Features:

  • 12 capacitive sensor ports.
  • Supported Matrix switches. Maximum 36 switches.
  • Automatic self-calibration.
  • Continued touch detection.
  • LED controller with PWM function.
  • Inform the detected result of switch operation by interrupt.
  • 2-wire serial bus interface.
  • Single power supply.
  • Built-in Power-On-Reset and Oscillator.
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Schematic Design & Verification

  • Impedance Characteristics of Bypass Capacitor

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