TCA9546A

Product Folder Order Now Technical Documents Tools & Software Support & Community TCA9546A SCPS205B – APRIL 2014 – REVISED NOVEMBER 2019 TCA9546A Low Voltage 4-Channel I2C and SMBus Switch with Reset Function 1 Features 1 1-of-4 Bidirectional translating switches I2C Bus and SMBus compatible Active-low reset input Three address pins, allowing up to eight TCA9546A devices on the I2C bus Channel selection via I2C Bus, in any combination Power-up with all switch 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 Supports hot insertion Low standby current Operating power-supply voltage range of 1.65 V to 5.5 V 5.5 V Tolerant inputs 0 to 400-kHz Clock frequency Latch-up performance exceeds 100 mA Per JESD 78 ESD Protection exceeds JESD 22 – 4000-V Human-body model (A114-A) – 1500-V Charged-device model (C101) 2 Applications Servers Routers (telecom switching equipment) Factory automation Products with I2C slave address conflicts (multiple, identical temp sensors) 3 Description The TCA9546A is a quad bidirectional translating switch controlled via the I2C bus. The SCL/SDA upstream pair fans out to four downstream pairs, or channels. Any individual SCn/SDn channel or combination of channels can be selected, determined by the contents of the programmable control register. An active-low reset (RESET) input allows the TCA9546A to recover from a situation in ...