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1 Features

? Each Channel Has Independent Direction Control

? 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

? I/Os Are 4.6V Tolerant

? Ioff Supports Partial-Power-Down Mode Operation

? VCC Isolation Feature - If Either VCC Input is at

GND, Both Ports are in High-Impedance State

? Typical Data Rates

– 500Mbps (1.8V to 3.3V Level-Shifting)

– 320Mbps (<1.8V to 3.3V Level-Shifting)

– 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

– 5000V Human-Body Model (A114-A)

– 200V Machine Model (A115-A)

– 1500V Charged-Device Model (C101)

2 Applications

? Personal Electronics

? Industrial

? Enterprise

? Telecom

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 SN74AVC2T245 is designed for asynchronous

communication between two data buses. The logic

levels of the direction-control (DIR) input and the

output-enable ( OE) activate either the B-port outputs

or the A-port outputs or place both output ports into

the high-impedance mode . 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 SN74AVC2T245 control pins (DIR1, DIR2, and

OE) are supplied 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 ensures that if either VCC

input is at GND, both ports are in the high-impedance

state.

To ensure the high-impedance state during power

up or power down, OE must be connected to VCC

through a pull-up resistor; the minimum value of the

resistor is determined by the current-sinking capability

of the driver.