PCA9541ADSLASH03 datasheet(24/41 Pages) NXP

Nome de Peças	PCA9541AD/03

Descrição Electrónicos	2-to-1 I2C-bus master selector with interrupt logic and reset

PDF	41 Pages

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Fabricante Electrônico	NXP [NXP Semiconductors]

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PCA9541A_3

Product data sheet

Rev. 03 — 16 July 2009

24 of 41

NXP Semiconductors

PCA9541A

2-to-1 I2C-bus master selector with interrupt logic and reset

10. Application design-in information

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.

Fig 17. Typical application

PCA9541A

SCL_MST0

SDA_MST0

INT0

3.3 V

MASTER 0

002aae661

SCL0

SDA0

INT0

INT_IN

VDD

VSS

VDD

RESET0

VSS

SLAVE 1

SDA

SCL

SLAVE 2

SDA

SCL

INT

SLAVE 3

SDA

SCL

SDA_SLAVE

SCL_SLAVE

SCL_MST1

SDA_MST1

INT1

3.3 V

MASTER 1

SCL1

SDA1

INT1

VDD

RESET1

VSS

RESET

SLAVE CARD

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