1 Features
1• No Direction-Control Signal Needed
• Maximum Data Rates
– 24 Mbps (Push Pull)
– 2 Mbps (Open Drain)
• Available in the Texas Instruments NanoStar™
Package
• 1.65 V to 3.6 V on A Port and 2.3 V to 5.5 V 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 100 mA Per
JESD 78, Class II
• ESD Protection Exceeds JESD 22
– A Port:
– 2500-V Human-Body Model (A114-B)
– 250-V Machine Model (A115-A)
– 1500-V Charged-Device Model (C101)
– B Port:
– 8-kV Human-Body Model (A114-B)
– 250-V Machine Model (A115-A)
– 1500-V 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 1.65 V to 3.6 V while it tracks the VCCA
supply, and the B ports supporting operating voltages
from 2.3 V to 5.5 V 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 1.8-V, 2.5-V, 3.3-V,
and 5-V 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 ensure the high-impedance state during power up
or power down, OE should be tied to GND through a
pulldown resistor; the minimum value of the resistor is
determined by the current-sourcing capability of the
driver.