PCA9546ADR Datasheet

Interface - Specialized


The PCA9546ADR 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. PCA9546ADR Features • 1-of-4 Bidirectional Translating Switches • I2C Bus and SMBus Compatible • Active-Low Reset Input • Three Address Pins, Allowing up to Eight Devices on the I2C Bus • Channel Selection Via I2C Bus • 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 2.3 V to 5.5 V• 5.5-V Tolerant Inputs• 0 to 400-kHz Clock Frequency• Latch-Up Performance Exceeds 100 mA PerJESD 78• ESD Protection Exceeds JESD 22


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