1 Features
• Qualified for automotive applications
• Control inputs VIH/VIL levels are referenced to
VCCA voltage
• Fully configurable dual-rail design allows each port
to operate over the full 1.2V to 3.6V power-supply
range
• Operating temperature from -40°C to 105°C
• I/Os are 4.6V tolerant
• Ioff supports partial-power-down mode operation
• Maximum data rates
– 500Mbps (1.8V to 3.3V translation)
– 320Mbps (< 1.8V to 3.3V translation)
– 320Mbps (translate to 2.5V or 1.8V)
– 280Mbps (translate to 1.5V)
– 240Mbps (translate to 1.2V)
• Latch-up performance exceeds 100mA per JESD
78, Class II
• ESD protection exceeds JESD 22
– 8000V human-body model (A114-A)
– 200V machine model (A115-A)
– 1000V charged-device model (C101)

2 Applications
• Smartphones
• Servers
• Desktop PCs and notebooks
• Other portable devices

3 Description
This dual-bit noninverting bus transceiver uses two
separate configurable power-supply rails. 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 SN74AVC2T45 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 SN74AVC2T45 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 powered down.
The VCC isolation feature makes sure that if either
VCC input is at GND, both ports are in the highimpedance
state.