DUAL SUPPLY TRANSLATING RANSCEIVER; AUTO DIRECTION SENSING; 3-STATE

DESCRIPTION

The UNTB0102 is a 2-bit, dual supply translating transceiver

with auto direction sensing, that enables bidirectional voltage level

translation. It features two 2-bit input-output ports (An and Bn), one

output enable input (OE) and two supply pins (VCCA and VCCB).

VCCA can be supplied at any voltage between 1.2V and 3.6V and

VCCB can be supplied at any voltage between 1.65V and 5.5V,

making the device suitable for translating between any of the low

voltage nodes (1.2V, 1.5V, 1.8V, 2.5V, 3.3V and 5.0V).

Pins An and OE are referenced to VCCA and pins Bn are

referenced to VCCB. A LOW level at pin OE causes the outputs to

assume a high-impedance OFF-state. This device is fully specified

for partial power-down applications using IOFF. The IOFF circuitry

disables the output, preventing the damaging backflow current

through the device when it is powered down.

FEATURES

* 1.2V to 3.6V on A Port and 1.65V to 5.5V on B Port

* IOFF circuitry provides partial Power-down mode operation

* Inputs accept voltages up to 5.5V