PCA9541AD View Datasheet(PDF) - NXP Semiconductors.
Part Name
Description
Manufacturer
PCA9541AD Datasheet PDF : 41 Pages
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NXP Semiconductors
PCA9541A
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
PCA9541A
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
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10.1 Specific applications
The PCA9541A 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
PCA9541A 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.
PCA9541A_3
Product data sheet
Rev. 03 — 16 July 2009
© NXP B.V. 2009. All rights reserved.
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