Dual-Bit Dual-Supply Bus Transceiver

This 2-bit unidirectional 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 translation between 0.9-V,

1.2-V, 1.5-V, 1.8-V, 2.5-V and 3.6-V voltage nodes. For the SN74AVC2T244, when the

output-enable ( OE) input is high, all outputs are placed in

the high-impedance state. The SN74AVC2T244 is designed so that the

OE input circuit is referenced to 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.