PCA9544A Overview
The PCA9544A is a 4-channel, bidirectional translating multiplexer 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.
PCA9544A Key Features
- 1 1-of-4 Bidirectional translating switches
- I2C Bus and SMBus patible
- Four active-low interrupt inputs
- Active-low interrupt output
- Three address pins, allowing up to eight devices
- Channel selection via I2C Bus
- Power up with all switch channels deselected
- Low RON switches
- Allows voltage-level translation between 1.8-V
- No glitch on power up
