PCA9541BS/03 View Datasheet(PDF) - NXP Semiconductors.
Part Name
Description
MFG CO.
PCA9541BS/03 Datasheet PDF : 41 Pages
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NXP Semiconductors
PCA9541
2-to-1 I2C-bus master selector with interrupt logic and reset
10. Application design-in information
3.3 V
VDD
MASTER 0
SCL0
SDA0
RESET0
INT0
VSS
3.3 V
VDD
MASTER 1
SCL1
SDA1
RESET1
INT1
VSS
SLAVE CARD
VDD
SCL_MST0
SDA_MST0
PCA9541
INT0
INT_IN
SDA_SLAVE
SCL_SLAVE
RESET
SLAVE 2
INT
SDA SCL
SDA SCL
SLAVE 1
SDA SCL
SLAVE 3
SCL_MST1
SDA_MST1
INT1
A3
A2
A1
A0
VSS
Fig 17. Typical application
002aab611
10.1 Specific applications
The PCA9541 is a 2-to-1 I2C-bus master selector designed for dual master, high reliability
I2C-bus applications, where continuous maintenance and control monitoring is required
even if one master fails or its controller card is removed for maintenance. The PCA9541
can also be used in other applications, such as where masters share the same resource
but cannot share the same bus, as a gatekeeper multiplexer in long single bus
applications or as a bus initialization/recovery device.
PCA9541_7
Product data sheet
Rev. 07 — 2 July 2009
© NXP B.V. 2009. All rights reserved.
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