Automotive 6-Bit Bidirectional Voltage-Level Translator with Auto Direction Sensing

This 6-bit noninverting translator

uses two separate configurable power-supply rails. The A port is designed to track

VCCA. VCCA accepts any supply voltage from 1.2V to 3.6V.

The B port is designed to track VCCB. VCCB accepts any supply

voltage from 1.65V to 5.5V. This allows for universal low-voltage bidirectional

translation between any of the 1.2V, 1.5V, 1.8V, 2.5V, 3.3V, and 5V voltage nodes.

VCCA should not exceed VCCB.

When the output-enable (OE) input is

low, all outputs are placed in the high-impedance state.

The TXB0106-Q1 device is designed so

that the OE input circuit is supplied by VCCA.

This device is fully specified for

partial-power-down applications using Ioff. The Ioff circuitry

disables the outputs, preventing damaging current backflow through the device when

it is powered down.

To ensure the high-impedance state

during power up or power down, OE should be tied to GND through a pulldown resistor;

the minimum value of the resistor is determined by the current-sourcing capability

of the driver.