This single-bit noninverting bus transceiver uses
two separate configurable power-supply rails. The SN74AVC1T45 is optimized to operate with
VCCA/VCCB set at 1.4V to
3.6V. It is operational with VCCA/VCCB
as low as 1.2V. The A port is designed to track
VCCA. VCCA accepts any
supply voltage from 1.2V to 3.6V. The B port is designed to
track VCCB. VCCB accepts any supply
voltage from 1.2V to 3.6V. This allows for universal
low-voltage, bidirectional translation between any of the
1.2V, 1.5V, 1.8V, 2.5V, and 3.3V voltage nodes.The SN74AVC1T45 is designed for asynchronous
communication between two data buses. The logic levels of
the direction-control (DIR) 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 ICC and
ICCZ.The SN74AVC1T45 is designed so that the DIR
input is powered by 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.The VCC
isolation feature is designed so that if either
VCC input is at GND, then both ports
are in the high-impedance state.NanoFree package
technology is a major breakthrough in IC packaging concepts,
using the die as the package.
