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PDF BU21077MUV Data sheet ( Hoja de datos )
| Número de pieza | BU21077MUV | |
| Descripción | Capacitive Switch Controller IC | |
| Fabricantes | ROHM Semiconductor | |
| Logotipo |  |
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Datasheet
Capacitive Controller ICs
Capacitive Switch Controller IC
BU21077MUV
General Description
BU21077MUV is a capacitive switch controller for switch
operation.
BU21077MUV has programmable MPU and it control the
sensing sequence and how to use value of sensor. It is
possible to reduce operational current with devising a
sensing sequence.
Key Specifications
■ Input Voltage Range
■ Operating Temperature Range
2.7 to 5.5V
-20 to +85°C
Package
VQFN020V4040
4.00 ㎜×4.00 ㎜×1.00 ㎜
Features
■ Programmable MPU
■ 8 Capacitive Sensor Ports
■ 2-Wire Serial Bus Interface
■ Single Power Supply
■ Built-in Power-On-Reset and Oscillator
Applications
■ Portable Device such as Smart Phone, PDA.
■ Electronic Device with Multi Switches
■ Information Appliance such as Projector
■ AV Appliance such as Digital TV, HDD Recorder
■ PC / PC Peripheral Equipment such as Laptop PC
Typical Application Circuit
2.2uF
1.0uF
VDD
15
16
SIN1
SIN0
AVDD
DVDD
RSTB
20
1
BU21077MUV
1.0uF
11
10
SIN5
SIN6
SIN7
TEST
INT
VDD
6 1MΩ
5
4.7kΩ
4.7kΩ
HOST
Figure 1. Typical Application Circuit
〇Product structure : Silicon monolithic integrated circuit
www.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
TSZ22111・14・001
〇This product has no designed protection against radioactive rays
1/12
TSZ02201-0L5L0F300820-1-2
14.Jul.2016 Rev.002
1 page  
BU21077MUV
Host Interface
BU21077MUV has 2-wire serial bus interface. It is compatible with I2C protocol and BU21077MUV is a slave device.
Slave address of BU21077MUV is 5Ch (Shown 7-bit). And it supports Standard-mode (100 KHz) and Fast-mode (400
kHz). It has sequential read for reduce access time.
SDA
SCL 1-7 8 9
S
START Address R/W ACK
1-7 8 9
Data
ACK
1-7
Data
89
NACK
/ ACK
P
STOP
Figure 7. 2-wire Serial Bus Interface Data Format
SDA
tHD;STA
SCL
tLOW
START
condition
tSU;DAT
tHD;STA
tHD;DAT
tHIGH
tSU;STA
repeated
START
condition
Figure 8. 2-wire Serial Bus Interface Timing Chart
tBUF
tSU;STO
STOP
condition
START
condition
Parameter
SCL Clock Frequency
Hold Time for ( Repeated ) START Condition
Low Period of SCL
High Period of SCL
Data Hold Time
Data Setup Time
Setup Time for Repeated Start Condition
Setup Time for STOP Condition
Bus Free Time Between STOP and START Condition
Symbol
fSCL
tHD;STA
tLOW
tHIGH
tHD;DAT
tSU;DAT
tSU;STA
tSU;STO
tBUF
Standard-mode
Min Max
0 100
4.0 -
4.7 -
4.0 -
0.1 3.45
0.25 -
4.7 -
4.0 -
4.7 -
Fast-mode
Min Max
0 400
0.6 -
1.3 -
0.6 -
0.1 0.9
0.1 -
0.6 -
0.6 -
1.3 -
Unit
kHz
μs
μs
μs
μs
μs
μs
μs
μs
www.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
5/12
TSZ02201-0L5L0F300820-1-2
14.Jul.2016 Rev.002
5 Page 
BU21077MUV
Physical Dimension, Tape and Reel Information
Package Name
VQFN020V4040
www.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
11/12
TSZ02201-0L5L0F300820-1-2
14.Jul.2016 Rev.002
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet BU21077MUV.PDF ] | |
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