SN74AXC2T45 2-Bit Translating Transceiver with Configurable Level-Shifting

1 Features

• AEC-Q100 automotive qualified

• Fully configurable dual-rail design allows each port

to operate with a power supply range from 0.65V

to 3.6V

• Operating temperature from –40°C to +125°C

• Glitch-free power supply sequencing

• Up to 380Mbps support when translating from 1.8V

to 3.3V

• VCC isolation feature

– If either VCC input is below 100mV, all

I/Os outputs are disabled and become high-

impedance

• Ioff supports partial-power-down mode operation

• Compatible with AVC family level shifters

• Latch-up performance exceeds 100mA per JESD

78, Class II

• ESD protection exceeds JESD 22

– 8000-V human-body model

– 1000-V charged-device model

2 Applications

• Enterprise and communications

• Industrial

• Personal electronics

• Wireless infrastructure

• Building automation

• Point-of-sale

3 Description

The SN74AXC2T45 is a two-bit noninverting bus

transceiver that uses two individually configurable

power-supply rails. The device is operational with both

VCCA and VCCB supplies as low as 0.65V. The A port

is designed to track VCCA, which accepts any supply

voltage from 0.65V to 3.6V. The B port is designed

to track VCCB, which also accepts any supply voltage

from 0.65V to 3.6V. Additionally the SN74AXC2T45 is

compatible with a single-supply system.

The

SN74AXC2T45

device

is

designed

for

asynchronous communication between data buses.

The device transmits data from the A bus to the B

bus or from the B bus to the A bus, depending on

the logic level of the direction-control input (DIR). The

SN74AXC2T45 device is designed so the control pin

(DIR) is referenced to VCCA.

This device is fully specified for partial-power-down

applications using the Ioff current. The Ioff protection

circuitry is designed so that no excessive current is

drawn from or to an input, output, or combined I/O

that is biased to a specific voltage while the device is

powered down.

The VCC isolation feature is designed so that if either

VCCA or VCCB is less than 100mV, both I/O ports enter

a high-impedance state by disabling their outputs.

Glitch-free power supply sequencing allows either

supply rail to be powered on or off in any order while

providing robust power sequencing performance.

Package Information

PART NUMBER

PACKAGE(1)

PACKAGE SIZE(2)

SN74AXC2T45

DCT (SSOP, 8)

2.95mm × 4mm

DCU (VSSOP, 8)

2mm × 3.1mm

DTM (X2SON, 8)

0.8mm × 1.35mm

(1)

For more information, see Section 11.

(2)

The package size (length × width) is a nominal value and

includes pins, where applicable.

A1

B1

DIR

A2

B2

V

CCB

V

CCA

Functional Block Diagram

SN74AXC2T45

SCES880D – AUGUST 2019 – REVISED JANUARY 2024

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.