DESCRIPTION

· The TCA9406 is a 2-bit bidirectional I2C and SMBus voltage-level translator with an output enable (OE) input.

· It operates from 1.65 V to 3.6 V on the A-side and 2.3 V to 5.5 V on the B-side, enabling interfacing between different logic levels.

· The OE input can be tied directly to VCCA or controlled by GPIO, allowing high-impedance state for reduced current consumption.

· It supports up to 2 Mbps in I2C/SMBus operation and up to 24 Mbps in push-pull configurations.

· Internal 10-kΩ pullup resistors are provided on all SCL and SDA pins.

FEATURES

· Bidirectional voltage translation for SDA and SCL lines in I2C applications without a direction pin.

· High-impedance output when OE=Low or VCC=0V.

· VCC isolation feature ensures high-impedance state if either VCC input is at GND.

· No power-supply sequencing required; either VCCA or VCCB can be ramped first.

· Low Ioff of 2 µA when either VCCA or VCCB=0V.

· ESD protection exceeds JESD 22 standards on both A and B ports.

APPLICATIONS

· I2C/SMBus communication systems.

· UART interfaces.

· General-purpose GPIO level translation.