1 Features
• Each Channel Has Independent Direction Control
• Control Inputs VIH/VIL Levels Are Referenced to
VCCA Voltage
• Fully Configurable Dual-Rail Design Allows Each
Port to Operate Over the Full 1.2V to
3.6V Power-Supply Range
• I/Os Are 4.6V Tolerant
• Ioff Supports Partial-Power-Down Mode Operation
• VCC Isolation Feature - If Either VCC Input is at
GND, Both Ports are in High-Impedance State
• Typical Data Rates
– 500Mbps (1.8V to 3.3V Level-Shifting)
– 320Mbps (<1.8V to 3.3V Level-Shifting)
– 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
– 5000V Human-Body Model (A114-A)
– 200V Machine Model (A115-A)
– 1500V Charged-Device Model (C101)

2 Applications
• Personal Electronics
• Industrial
• Enterprise
• Telecom

3 Description
This dual-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 1.2V to 3.6V. The B port is designed
to track VCCB. VCCB accepts any supply voltage from
1.2V to 3.6V. This 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 SN74AVC2T245 is designed for asynchronous
communication between two data buses. The logic
levels of the direction-control (DIR) input and the
output-enable ( OE) activate either the B-port outputs
or the A-port outputs or place both output ports into
the high-impedance mode . 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 on
both A and B ports always is active and must have
a logic HIGH or LOW level applied to prevent excess
ICC and ICCZ.
The SN74AVC2T245 control pins (DIR1, DIR2, and
OE) are supplied 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 ensures that if either VCC
input is at GND, both ports are in the high-impedance
state.
To ensure the high-impedance state during power
up or power down, OE must be connected to VCC
through a pull-up resistor; the minimum value of the
resistor is determined by the current-sinking capability
of the driver.