TCA9406 Overview
Description
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.
Key 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 Tied Directly to VCCA Or Controlled By GPIO
- Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II
