1 Features

• ESD protection exceeds JESD 22:

– 2000V Human-Body Model (A114-A)

– 200V Machine Model (A115-A)

– 1000V Charged-Device Model (C101)

• Available in the Texas Instruments NanoFree™

package

• Fully configurable dual-rail design allows each port

to operate over the full 1.65V to 5.5V power-supply

range

• VCC isolation feature – if either VCC input is at

GND, both ports are in the high-impedance state

• DIR input circuit referenced to VCCA

• Low power consumption, 4μA maximum ICC

• ±24mA output drive at 3.3V

• Ioff supports partial-power-down mode operation

• Maximum data rates

– 420Mbps (3.3V to 5V translation)

– 210Mbps (translate to 3.3V)

– 140Mbps (translate to 2.5V)

– 75Mbps (translate to 1.8V)

• Latch-up performance exceeds 100mA per JESD

78, Class II

2 Applications

• Personal electronic

• Industrial

• Enterprise

• Telecom

3 Description

This single-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 1.65V to 5.5V. The B port is designed

to track VCCB. VCCB accepts any supply voltage from

1.65V to 5.5V. This allows for universal low-voltage

bidirectional translation between any of the 1.8V, 2.5V,

3.3V, and 5V voltage nodes.

The SN74LVC1T45 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 is always active on both

A and B ports and must have a logic HIGH or LOW

level applied to prevent excess ICC and ICCZ.

The SN74LVC1T45 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.