Datasheet

PCA9540B All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2014. All rights reserved.
Product data sheet Rev. 6 — 5 May 2014 9 of 27
NXP Semiconductors
PCA9540B
2-channel I
2
C-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 AS 1 A P
slave address
START condition R/W acknowledge
from slave
acknowledge
from slave
control register
SDA
STOP condition
XXXXXB2B1B0
002aae720
XXXXXB2B1B01 1 0 0 0 0 1 AS 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
V
SS
SDA
SCL
V
DD
= 3.3 V
V
DD
= 2.7 V to 5.5 V
I
2
C-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