PCA9540BGD NXP [NXP Semiconductors], PCA9540BGD Datasheet - Page 8

• Manufacturer Part Number: PCA9540BGD
• Description: 2-channel I2C-bus multiplexer
• Manufacturer: NXP [NXP Semiconductors]

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