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PCA9540BDP Datasheet(PDF) 8 Page - NXP Semiconductors

Part # PCA9540BDP
Description  2-channel I2C-bus multiplexer
PDF  22 Pages
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Manufacturer  NXP [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo NXP - NXP Semiconductors

PCA9540BDP Datasheet(HTML) 8 Page - NXP Semiconductors

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PCA9540B_4
© NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 04 — 3 September 2009
8 of 22
NXP Semiconductors
PCA9540B
2-channel I2C-bus multiplexer
7.5 Bus transactions
8.
Application design-in information
Fig 12. Write control register
Fig 13. Read control register
002aae719
1
1
0
0
0
0
0
A
S
1
A
P
slave address
START condition
R/W
acknowledge
from slave
acknowledge
from slave
control register
SDA
STOP condition
XXXXX
B2
B1
B0
002aae720
XXXXX
B2
B1
B0
1
1
0
0
0
0
1
A
S
1
NA
P
slave address
START condition
R/W
acknowledge
from slave
no acknowledge
from master
control register
SDA
STOP condition
last byte
Fig 14. Typical application
PCA9540B
SD0
SC0
VSS
SDA
SCL
VDD = 3.3 V
VDD = 2.7 V to 5.5 V
I2C-bus/SMBus master
002aae721
SDA
SCL
channel 0
V = 2.7 V to 5.5 V
SD1
SC1
channel 1
V = 2.7 V to 5.5 V



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