pca9541a NXP Semiconductors, pca9541a Datasheet - Page 24

• Manufacturer Part Number: pca9541a
• Description: 2-to-1 I2c-bus Master Selector With Interrupt Logic And Reset
• Manufacturer: NXP Semiconductors

NXP Semiconductors
10. Application design-in information
PCA9541A_3
Product data sheet
10.1 Specific applications
The PCA9541A is a 2-to-1 I
reliability I
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.
Fig 17. Typical application
3.3 V
3.3 V
MASTER 0
MASTER 1
2
C-bus applications, where continuous maintenance and control monitoring is
RESET0
RESET1
V
V
V
V
DD
DD
SS
SS
SDA0
SDA1
SCL0
SCL1
INT0
INT1
Rev. 03 — 16 July 2009
2-to-1 I
2
C-bus master selector designed for dual master, high
2
C-bus master selector with interrupt logic and reset
SCL_MST0
SDA_MST0
INT0
RESET
SCL_MST1
SDA_MST1
INT1
A3
A2
A1
A0
PCA9541A
V
V
SDA_SLAVE
SCL_SLAVE
DD
SS
INT_IN
SDA
SLAVE 1
SCL
SDA
INT
PCA9541A
SLAVE 2
© NXP B.V. 2009. All rights reserved.
SCL
SDA
SLAVE CARD
SLAVE 3
002aae661
SCL
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