2-BIT BIDIRECTIONAL VOLTAGE-LEVEL TRANSLATOR FOR OPEN-DRAIN AND PUSH-PULL APPLICATION

DESCRIPTION

This 2-bit non-inverting translator is a bidirectional voltage-level

translator and can be used to establish digital switching

compatibility between mixed-voltage systems. It uses two separate

configurable power supply rails, with the A ports supporting

operating voltages from 1.65V to 3.6V while it tracks the VCCA

supply, and the B ports supporting operating voltages from 2.3V to

5.5V while it tracks the VCCB supply.

This allows the support of both lower and higher logic signal

levels while providing bidirectional translation capabilities between

any of the 1.8V, 2.5V, 3.3V, and 5V voltage nodes.

When the output-enable (OE) input is low, all I/Os are placed in

the high-impedance state, which significantly reduces the

power-supply quiescent current consumption.

To ensure the high-impedance state during power-up or power

-down, OE should be tied to GND through a pull-down resistor; the

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

capability of the driver.

FEATURES

* 1.65V to 3.6V on A Port and 2.3V to 5.5V on B Port (VCCA ≤ VCCB)

* No Direction-Control Signal Needed

* No Power-Supply Sequencing Required – Either VCCA or VCCB Can be Ramped First

* IOFF Supports Partial-Power-Down Mode Operation

APPLICATION

* Handset

* Smartphone

* Tablet

* Desktop PC