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.