PCA9545 Datasheet

PCA9545 4-channel I2C switch with interrupt logic and reset

The PCA9545 is a quad bi-directional translating switch controlled via the I2C bus. The SCL/SDA upstream pair fans out to four downstream pairs, or channels. Any individual SCx/SDx channel or combination of channels can be selected, determined by the contents of the programmable control register. Fo.

Features

• 1-of-4 bi-directional translating switches
• I2C interface logic; compatible with SMBus standards
• 4 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 to 400 kHz cl.