This 2-bit noninverting bus transceiver uses two separate configurable power-supply
rails. The A ports are designed to track VCCA and accepts any supply voltage
from 1.2 V to 3.6 V. The B ports are designed to track VCCB and accepts any
supply voltage from 1.2 V to 3.6 V. This allows for universal low-voltage bidirectional translation
and level-shifting between any of the 1.2-V, 1.5-V, 1.8-V, 2.5-V, and 3.3-V voltage nodes.
The SN74AVC2T45 is designed for asynchronous communication between two data buses. The
logic levels of the direction-control (DIR pin) input activate either the B-port outputs or the
A-port outputs. The device transmits data from the A bus to the B bus when the B-port outputs are
activated and from the B bus to the A bus when the A-port outputs are activated. The input
circuitry on both A and B ports always is active and must have a logic HIGH or LOW level applied to
prevent excess leakage current on the internal CMOS structure.
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