TCA9406 - Texas Instruments

TCA9406 2-Bit Bidirectional 1-MHz I2C Bus and SMBus Voltage-Level Translator

The TCA9406 is a 2-bit bidirectional I2C and SMBus voltage-level translator with an output enable (OE) input. It is operational from 1.65 V to 3.6 V on the Aside, referenced toVCCA, and from 2.3 V to 5.5 V on the B-side, referenced to VCCB. This allows the device to interface between lower and higher logic signal levels at any of the typical 1.8-V, 2.5-V, 3..

Features

•1 2-Bit Bidirectional Translator for SDA and SCL Lines in I2C Applications
• Provides Bidirectional Voltage Translation With No Direction Pin
• High-Impedance Output SCL_A, SDA_A, SCL_B, SDA_B Pins When OE = Low or VCC = 0 V
• Internal 10-kΩ Pullup Resistor on All SDA and SCL Pins
• 1.65 V to 3.6 V on A port and 2.3 V to 5.5 V on B port (VCCA ≤ VCCB)
• VCC Isolation Feature: If Either VCC Input Is at GND, Both Ports Are in the High-Impedance State
• No Power-Supply Sequencing Required: Either VCCA or VCCB Can Be Ramped First
• Low Ioff of 2 µA When Either VCCA or VCCB = 0 V
• OE Input Can Be .