Capacitive Sensor Switch Control ICs - BU21072MUV

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.
número de peça
Estado de Condição
Quantidade Unidade
Quantidade mínima Package
tipo de embalagem
BU21072MUV-E2 Active VQFN024V4040 2500 2500 Taping sim
Vcc(Min.)[V] 3.0
Vcc(Max.)[V] 5.5
Sensor input channels 10
LED control channels 6
Interface I2C
Matrix key 4 x 4
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.
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Dados técnicos
Thermal Resistance

The definition and how to use thermal resistance and thermal characterization parameter of packages for ROHM’s integrated circuit are described in this application note.

NE Handbook Series

Sensor Networks