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Description

The PCA9544A is a quad bidirectional translating switch controlled via the I2C bus. The SCL/SDA upstream pair fans out to four downstream pairs, or channels. One SCL/SDA pair can be selected at a time, and this is determined by the contents of the programmable control register.

Diagram

Features

1. 1-of-4 Bidirectional translating switches

2. I2C Bus and SMBus compatible

3. Four active-low interrupt inputs

4. Active-low interrupt output

5. Three address pins, allowing up to eight devices on the I2C Bus

6. Channel selection via I2C Bus

7. Power up with all switch channels deselected