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PCA9544A

4-channel I2C multiplexer with interrupt logic

Philips Electronics 

Philips Semiconductors

4-channel I2C multiplexer with interrupt logic

TYPICAL APPLICATION

VDD = 2.7 – 5.5 V

SDA

SCL

I2C/SMBus MASTER

VDD = 3.3 V

SDA

SCL

INT

SD0

SC0

INT0

SD1

SC1

INT1

SD1

SC1

INT2

NOTE:

1. If the device generating the Interrupt has an open-drain output

structure or can be tri-stated, a pull-up resistor is required.

If the device generating the Interrupt has a totem-pole output

structure and cannot be tri-stated, a pull-up resistor is not

required.

The Interrupt inputs should not be left floating.

SD1

A2

SC1

A1

INT3

A0

VSS

PCA9544A

Figure 13. Typical application

Product data sheet

PCA9544A

V = 2.7 – 5.5 V

SEE NOTE (1)

CHANNEL 0

V = 2.7 – 5.5 V

SEE NOTE (1)

CHANNEL 1

V = 2.7 – 5.5 V

SEE NOTE (1)

CHANNEL 2

V = 2.7 – 5.5 V

SEE NOTE (1)

CHANNEL 3

SW02268

2004 Sep 29

9

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