1FEATURES

• Fully Symmetric Supply Voltages.

0.9 V to 3.6 V on A Port and 0.9 V to 3.6 V

• VCC Isolation Feature — If Either VCC Input Is at

GND, All Outputs Are in the High-Impedance

State

• OE Input Circuit Referenced to VCCA

• Low Power Consumption, 5-μA Max I CC

• Ioff Supports Partial-Power-Down Mode

Operation

• Latch-Up Performance Exceeds 100 mA Per

JESD 78, Class II

• ESD Protection Exceeds JESD 22

– 4000-V Human-Body Model (A114-B)

– 1000-V Charged-Device Model (C101)

DESCRIPTION

This 2-bit noninverting translator uses two separate

configurable power-supply rails. The A port is

designed to track VCCA. VCCA accepts any supply

voltage from 0.9 V to 3.6 V. The B port is designed to

track VCCB. VCCB accepts any supply voltage from

0.9 V to 3.6 V. This allows for low-voltage

bidirectional translation between 1-V, 1.2-V, 1.5-V,

1.8-V, 2.5-V and 3.3-V voltage nodes. For the

TXB0302, 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

pulldown resistor; the minimum value of the resistor is

determined by the current-sourcing capability of the

driver. The TXB0302 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.