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 highimpedance
• 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.