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PCA9545A (Rev. C)
Texas Instruments

1-of-4 Bidirectional Translating SwitchesI2C Bus and SMBus CompatibleFour Active-Low Interrupt InputsActive-Low Interrupt OutputActive-Low Reset InputTwo Address Pins, Allowing up to Four Devices on the I2C BusChannel Selection Via I2C Bus, In Any CombinationPower Up With All Switch Channels DeselectedLow RON SwitchesAllows Voltage-Level Translation Between 1.8-V, 2.5-V, 3.3-V, and 5-V BusesNo Glitch on Power UpSupports Hot InsertionLow Standby CurrentOperating Power-Supply Voltage Range of 2.3 V to 5.5 V5.5-V Tolerant Inputs0 to 400-kHz Clock FrequencyLatch-Up Performance Exceeds 100 mA Per JESD 78ESD Protection Exceeds JESD 222000-V Human-Body Model (A114-A)200-V Machine Model (A115-A)1000-V Charged-Device Model (C101) DESCRIPTION/ORDERING INFORMATION The PCA9545A 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. Four interrupt inputs (INT3

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