Capacitive Sensor Switch Control ICs - BU21078MUV

BU21072MUV/BU21078MUV is a capacitive sensorcontroller for switch operation.
In addition to a regular simple switch, support matrixswitches which are arranged in the matrix sensors. Ifexternal noise and temperature drift are detected, theautomatic self-calibration is operated.
Include LED controller with PWM function.

* This product is a STANDARD grade product and not recommend for on-vehicle devices.
Part Number
Unit Quantity
Minimum Package Quantity
Packing Type
Constitution Materials List
BU21078MUV-E2 Active VQFN028V5050 2500 2500 Taping inquiry Yes
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
  • ・ 10 capacitive sensor ports. (BU21072MUV) 12 capacitive sensor ports. (BU21078MUV)
    ・ Supported Matrix switches. Maximum 16 switches. (BU21072MUV) Maximum 36 switches. (BU21078MUV)
    ・ Automatic self-calibration.
    ・ Held touch detection.
    ・ LED controller with PWM function.
    ・ Inform the detected result of switch operation by interrupt.
    ・ 2-wire serial bus interface.
    ・ 3.3V single power supply.
    ・ Built-in Power-On-Reset and Oscillator.
Technical Data
Application Note

Thermal Resistance

NE Handbook Series

Sensor Networks