PCA9543 - NXP

PCA9543 2-channel I2C switch

The PCA9543 is a bi-directional translating switch, controlled by the I2C-bus. The SCL/SDA upstream pair fans out to two downstream pairs, or channels. Any individual SCx/SDx channels or combination of channels can be selected, determined by the contents of the programmable control register. Two interrupt inputs, INT0 to INT3, one for each of the downstream .

Features

• 1-of-2 bi-directional translating switches
• I2C interface logic; compatible with SMBus standards
• 2 Active LOW Interrupt Inputs
• Active LOW Interrupt Output
• Active LOW Reset Input
• 2 address pins allowing up to 4 devices on the I2C-bus
• Channel selection via I2C-bus, in any combination
• Power up with all switch channels deselected
• Low RdsON switches
• Allows voltage level translation between 1.8 V, 2.5 V, 3.3 V and
• No glitch on power-up
• Supports hot insertion
• Low stand-by current
• Operating power supply voltage range of 2.3 V to 5.5 V
• 5 V tolerant Inputs
• 0 kHz to 400 kH.