1 Features
• No direction-control signal needed
• Maximum data rates:
– 24Mbps (push pull)
– 2Mbps (open drain)
• Available in the Texas Instruments NanoStar™
integrated circuit package
• 1.65V to 3.6V on A port and 2.3V to 5.5V on B port
(VCCA ≤ VCCB)
• VCC isolation feature: if either VCC input is at GND,
both ports are in the High-Impedance state
• No power-supply sequencing required: either VCCA
or VCCB can be ramped first
• Ioff supports partial-power-down mode operation
• Latch-up performance exceeds 100mA per JESD
78, Class II
• ESD protection exceeds JESD 22:
– A port:
• 2500V Human-Body Model (A114-B)
• 250V Machine Model (A115-A)
• 1500V Charged-Device Model (C101)
– B port:
• 8kV Human-Body Model (A114-B)
• 250V Machine Model (A115-A)
• 1500V Charged-Device Model (C101)

2 Applications
• I2C / SMBus
• UART
• GPIO

3 Description
This two-bit non-inverting translator is a bidirectional
voltage-level translator and can be used to establish
digital switching compatibility between mixed-voltage
systems. It uses two separate configurable powersupply
rails, with the A ports supporting operating
voltages from 1.65V to 3.6V while it tracks the VCCA
supply, and the B ports supporting operating voltages
from 2.3V to 5.5V while it tracks the VCCB supply.
This allows the support of both lower and higher logic
signal levels while providing bidirectional translation
capabilities between any of the 1.8V, 2.5V, 3.3V, and
5V voltage nodes.
When the output-enable (OE) input is low, all I/Os
are placed in the high-impedance state, which
significantly reduces the power-supply quiescent
current consumption.
To put the device in the high-impedance state during
power up or power down, tie OE to GND through
a pulldown resistor; the current-sourcing capability
of the driver determines the minimum value of the
resistor.