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Product structure：Silicon monolithic integrated circuit ○This product has no designed protection against radioactive rays

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TSZ02201-0L5L0F300830-1-2

© 2013 ROHM Co., Ltd. All rights reserved.

14.Jul.2016 Rev.002

TSZ22111・14・001

www.rohm.com

Capacitive Controller ICs

Capacitive Switch Controller IC

BU21170MUV

General Description

BU21170MUV is a capacitive sensor controller for switch

operation.

BU21170MUV has five sensors and provides the simple

switch function by each sensor.

If external noise and temperature drift are detected, the

automatic self-calibration is operated.

Include LED controller with PWM function.

Features



5 capacitive sensor ports.



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.

Applications



Information appliance as printer.



AV appliance as digital TV and HDD recorder.



Notebook PC.

Key Specifications



Power Supply Voltage Range:

3.0V to 5.5V



Operating Temperature Range:

-25°C to +85°C



Operating Current:

3.5mA(Typ without load)



Scan Rate:

14.8msec(Typ)

Package

W(Typ) x D(Typ) x H(Max)

VQFN020V4040

4.00mm x 4.00mm x 1.00mm

Typical Application Circuit

VSS

TEST

HOST

SCL

SDA

INT

VDD

VDD

VDD

VDD

Recommended DT number : DTC043ZEB

LED4

SIN2

BU21170MUV

TOP VIEW

1

5

15

11

20

16

6

10

VDD

SIN4

SIN3

VDD

VDD

N.C.

VQFN020V4040

Figure 1. Typical Application Circuit

Datasheet