BU21072MUV Datasheet, PDF (1/17 Pages) Rohm – Capacitive Switch Controller ICs

BU21072MUV
Capacitive Controller ICs
Capacitive Switch Controller ICs
BU21072MUV / BU21078MUV
●General Description
BU21072MUV/BU21078MUV 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.
●Features
■ 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.
●Applications
■ Appliance that require multiple switches.
■ Information appliance as printer.
■ AV appliance as digital TV and HDD recorder.
■ Notebook PC.
●Typical Application Circuit
●Key Specifications
■ Input voltage range
■ Operating temperature range
■ Operating current
■ Scan rate
3.0 to 3.6V (Typ.)
-25 to 85℃ (Typ.)
3.5mA (Typ.
without load)
16msec (Typ.)
●Packages
BU21072MUV :
VQFN024V4040
4.00 ㎜×4.00 ㎜×1.00 ㎜
BU21078MUV :
VQFN028V5050
5.00 ㎜×5.00 ㎜×1.00 ㎜
VQFN024V4040
VQFN028V5050
Fig.1 Typical Application Circuit
○Product structure：Silicon monolithic integrated circuit ○This product is not designed protection against radioactive rays
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TSZ22111・14・001
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TSZ02201-0Y2Y0FZ00020-1-2
12.Mar.2012 Rev.001