9544A Overview
The PCA9544A is a 1-of-4 bidirectional translating multiplexer, controlled via the I2C-bus. The SCL/SDA upstream pair fans out to four SCx/SDx downstream pairs, or channels. Only one SCx/SDx channel is selected at a time, determined by the contents of the programmable control register.
9544A Key Features
- 1-of-4 bidirectional translating multiplexer
- I2C-bus interface logic; patible with SMBus
- 4 active LOW interrupt inputs
- Active LOW interrupt output
- 3 address pins allowing up to 8 devices on the I2C-bus
- Channel selection via I2C-bus
- Power-up with all multiplexer channels deselected
- Low Ron switches
- Allows voltage level translation between 1.8 V, 2.5 V, 3.3 V and 5 V buses
- No glitch on power-up