1FEATURES
• Fully Symmetric Supply Voltages.
0.9 V to 3.6 V on A Port and 0.9 V to 3.6 V
• VCC Isolation Feature — If Either VCC Input Is at
GND, All Outputs Are in the High-Impedance
State
• OE Input Circuit Referenced to VCCA
• Low Power Consumption, 5-μA Max I CC
• Ioff Supports Partial-Power-Down Mode
Operation
• Latch-Up Performance Exceeds 100 mA Per
JESD 78, Class II
• ESD Protection Exceeds JESD 22
– 4000-V Human-Body Model (A114-B)
– 1000-V Charged-Device Model (C101)

DESCRIPTION
This 2-bit noninverting translator uses two separate
configurable power-supply rails. The A port is
designed to track VCCA. VCCA accepts any supply
voltage from 0.9 V to 3.6 V. The B port is designed to
track VCCB. VCCB accepts any supply voltage from
0.9 V to 3.6 V. This allows for low-voltage
bidirectional translation between 1-V, 1.2-V, 1.5-V,
1.8-V, 2.5-V and 3.3-V voltage nodes. For the
TXB0302, when the output-enable (OE) input is low,
all outputs are placed in the high-impedance state. 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. The TXB0302 is designed so that the OE input
circuit is 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.