TCA9544A

Product Folder Order Now Technical Documents Tools & Software Support & Community TCA9544A SCPS209C – MAY 2014 – REVISED NOVEMBER 2019 TCA9544A Low Voltage 4-Channel I2C and SMBus Multiplexer With Interrupt Logic 1 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 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 (For Example, Multiple, Identical Temp Sensors) 3 Description 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-o...