TI PCA9545APWR

The 4:1 bidirectional switch is compatible with I2C bus and SMBus. It features four active-low interrupt inputs, an active-low interrupt output, an active-low reset input, and two address terminals, allowing up to four devices to be used on the I2C bus. Channel selection can be achieved through the I2C bus in any combination. All switch channels are deselected upon power-up. It has low RON switches and supports voltage level conversion between 1.8V, 2.5V, 3.3V, and 5V buses. There is no interference upon power-up, and it supports hot insertion. It has low standby current, an operating power supply voltage range of 2.3V to 5.5V, 5.5V tolerant inputs, a clock frequency of 0 to 400kHz, a latch-up performance exceeding 100mA, complying with the JESD 78 specification, and an ESD protection performance exceeding the requirements of the JESD 22 specification, with 2000V for the Human Body Model (A114 - A) and 1000V for the Charged Device Model (C101).

• 4-to-1 bidirectional translation switch compatible with I2C bus and SMBus
• Four active-low interrupt inputs
• Active-low interrupt output
• Active-low reset input
• Two address pins allowing up to four devices on the I2C bus
• Channel selection via I2C bus in any combination
• All switch channels deselected at power-on
• Low RON switches
• Voltage level translation between 1.8V, 2.5V, 3.3V, and 5V buses
• No glitch at power-on
• Hot-insertion capable
• Low standby current
• Operating supply voltage range: 2.3V to 5.5V
• 5.5V tolerant inputs
• Clock frequency: 0 to 400kHz
• Latch-up performance exceeds 100mA per JESD 78
• ESD protection exceeds JESD 22 requirements
• 2000V Human Body Model (A114-A)
• 1000V Charged Device Model (C101)

• Servers
• Routers (telecom switching equipment)
• Factory automation
• Products with I2C slave address conflicts (e.g., multiple identical temperature sensors)