TCA9544A - Texas Instruments

TCA9544A Low Voltage 4-Channel I2C and SMBus Multiplexer

The TCA9544A is a 4-channel, bidirectional translating I2C Muliplexer. The master SCL/SDA signal pair is directed to one of the four channels of slave devices, SC0/SD0-SC3/SD3. Four interrupt inputs (INT3–INT0), one for each of the downstream pairs, are provided. One interrupt output (INT) acts as an AND of the four interrupt inputs. A power-on reset functio.

Features

•1 1-of-4 Bidirectional Translating Switches
• I2C Bus and SMBus Compatible
• Four Active-Low Interrupt Inputs
• Active-Low Interrupt Output
• Three Address Pins, Allowing up to Eight TCA9544A 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 1.65 V to 5.5 V
• 5.5-V Tolerant Inputs
• 0 to 400-kHz Clock Frequency
• Latch-Up Performance E.