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.