1 Features

• Available in Texas Instruments' NanoStar™

integrated circuit package

• Available in Texas Instruments' NanoFree™

package

• Control inputs (DIR) VIH and VIL levels are

referenced to VCCA voltage

• Bus hold on data inputs eliminates the need for

external pullup and pulldown resistors

• VCC isolation

• Fully configurable dual-rail design

• I/Os are 4.6V tolerant

• Ioff supports partial-power-down mode operation

• Typical max 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

– Human-Body Model (A114-A): 2000V

– Machine Model (A115-A): 200V

– Charged-Device Model (C101): 1000V

2 Applications

• Personal electronics

• Industrial

• Enterprise

• Telecommunications

3 Description

The SN74AVCH1T45 is a single-bit noninverting

bus transceiver that uses two separate configurable

power-supply rails. The A port is designed to track

VCCA, which accepts any supply voltage from 1.2V

to 3.6V. The B port is designed to track VCCB, which

accepts any supply voltage from 1.2V to 3.6V. This

feature 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 SN74AVCH1T45 is designed for asynchronous

communication between two data buses. The device

transmits data from either the A bus to the B bus, or

from the B bus to the A bus, depending upon the logic

level at the direction-control (DIR) input.

The SN74AVCH1T45 is designed so that the DIR

input is referenced to VCCA.