〇Product structure : Silicon monolithic integrated circuit 〇This product has no designed protection against radioactive rays

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TSZ22111・14・001

TSZ02201-0L5L0F300930-1-2

06.Aug.2018 Rev.002

Capacitive Switch Controller ICs

Capacitive Switch Controller IC

BU21180FS

General Description

BU21180FS is a capacitive switch controller for switch

operation. This IC uses changes in capacitance to detect

Switch ON / OFF / Long Press.

Features



20 Capacitive Sensor Ports.



Switch ON / OFF / Long Press Detection.



Information by Interrupt Terminal.



Noise Calibration Function.



Drift Calibration Function.



Switch Detection Time Function.



2-wire Serial Bus Interface.



Single Power Supply.

Applications



Office Automation Appliance as Printer.



AV Appliance as TV and HDD Recorder.



Home Appliance as Air Conditioner, Refrigerator

and Rice Cooker.



Electrical Equipment with Multiple Switches.

Key Specifications

 Power Supply Voltage Range:

3.0V to 5.5V

 Operating Temperature Range:

-25°C to +85°C

 Operating Current:

3.5mA(Typ)

Package

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

SSOP-A32

13.60mm x 7.80mm x 2.01mm

Typical Application Circuit

2.2

μF

0.1

μF

1.0

μF

4.7

μF

1

16

17

32

VSS

SDA

SCL

ADDR

NC

TEST1

TEST2

CS19

CS18

CS17

CS16

CS15

CS14

CS13

CS12

VDD

RSTB

DVDD

AVDD

CS0

CS1

CS2

CS3

CS4

CS5

CS6

CS7

CS8

CS9

CS10

CS11

HOST

INTB

VDD

Sensor Electrode

VDD

VDD VDD

(Note 1)

(Note 2)

(Note 1) The pull-up resistors must be connected to VDD.

Choose the value of the pull-up resistors so as to meet 2-wire Serial Bus Interface Electrical Characteristics.

(Note 2) For noise protection, choose the value of the resistors by evaluation.

Figure 1. Typical Application Circuit

SSOP-A32

Datasheet