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1 Features

? 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

? DIR control input for each channel

? Glitch-free power supply sequencing

? Up to 380-Mbps support when translating from

1.8V to 3.3V

? VCC isolation feature

– If either VCC input is below 100mV, all

I/O outputs are disabled and become highimpedance

? Ioff supports partial-power-down mode operation

? Compatible with AVC-family level shifters

? Latch-up performance exceeds 100 mA per JESD

78, class II

? ESD protection exceeds JEDEC JS-001

– 8000-V Human-body model

– 1000-V Charged-device model

1 Features

? 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

? DIR control input for each channel

? Glitch-free power supply sequencing

? Up to 380-Mbps support when translating from

1.8V to 3.3V

? VCC isolation feature

– If either VCC input is below 100mV, all

I/O outputs are disabled and become highimpedance

? Ioff supports partial-power-down mode operation

? Compatible with AVC-family level shifters

? Latch-up performance exceeds 100 mA per JESD

78, class II

? ESD protection exceeds JEDEC JS-001

– 8000-V Human-body model

– 1000-V Charged-device model

3 Description

The SN74AXC2T245 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 SN74AXC2T245

is compatible with a single-supply system.

The SN74AXC2T245 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 inputs (DIRx). The

SN74AXC2T245 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.