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G2129TL1U

General Description

This 4-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.

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 G2129 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.

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