1-BIT BIDIRECTIONAL LEVEL-SHIFTING AND VOLTAGE-LEVEL TRANSLATOR

WITH AUTO DIRECTION-SENSING FOR OPEN-DRAIN AND PUSH-PULL APPLICATIONS

DESCRIPTION

This one-bit non-inverting translator uses two separate

configurable power-supply rails. The A port is designed to track VCCA.

VCCA accepts any supply voltage from 1.65V to 3.6V. The B port is

designed to track VCCB. VCCA must be less than or equal to VCCB. VCCB

accepts any supply voltage from 2.3V to 5.5V. This allows for low

voltage bidirectional translation between any of the 1.8V, 2.5V, 3.3V,

and 5V voltage nodes.

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

the high-impedance state.

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)

* VCC isolation feature – If either VCC input is at GND, all outputs are in the High-Impedance state

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

* IOFF Supports Partial-Power-Down Mode Operation