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.