PCA9547 Overview
The PCA9547 is an octal bidirectional translating multiplexer controlled by the I2C-bus. The SCL/SDA upstream pair fans out to eight downstream pairs, or channels. Only one SCx/SDx channel can be selected at a time, determined by the contents of the programmable control register.
PCA9547 Key Features
- 1-of-8 bidirectional translating multiplexer
- I2C-bus interface logic; patible with SMBus standards
- Active LOW RESET input
- 3 address pins allowing up to 8 devices on the I2C-bus
- Channel selection via I2C-bus, one channel at a time
- Power-up with all channels deselected except Channel 0 which is connected
- Low Ron multiplexers
- Allows voltage level translation between 1.8 V, 2.5 V, 3.3 V and 5 V buses
- No glitch on power-up
- Supports hot insertion