DUAL SUPPLY TRANSLATING TRANSCEIVER, OPEN DRAIN, AUTO DIRECTION SENSING

DESCRIPTION

The UNTS0104 is a 4-bit, dual supply translating transceiver

with auto direction sensing, that enables bidirectional voltage level

translation. It features two 4-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 1.65 V and 3.6 V and

VCCB can be supplied at any voltage between 2.3 V and 5.5 V,

making the device suitable for translating between any of the

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

* Wide supply voltage range:

VCCA: 1.65V to 3.6V

VCCB : 2.3V to 5.5V

* Maximum data rates:

Push-pull: 50 Mbps

* IOFF circuitry provides partial Power-down mode operation

* Inputs accept voltages up to 5.5V