1 Features
• 1.2V to 3.6V on A Port and 1.65V to 5.5V on B
Port (VCCA ≤ VCCB)
• 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, 4μA Max ICC
• Ioff Supports Partial-Power-Down Mode Operation
• Latch-Up Performance Exceeds 100mA Per JESD
78, Class II
• ESD Protection Exceeds JESD 22
– A Port
• 2000V Human-Body Model (A114-B)
• 1000V Charged-Device Model (C101)
– B Port
• ±15kV Human-Body Model (A114-B)
• ±8kV Human-Body Model (A114-B) (YZP
Package Only)
• 1000V Charged-Device Model (C101)

2 Applications
• Handset
• Smartphone
• Tablet
• Desktop PC

3 Description
This 8-bit noninverting translator 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
1.65V to 5.5V. This allows for universal low-voltage
bidirectional translation between any of the 1.2V, 1.5V,
1.8V, 2.5V, 3.3V, and 5V voltage nodes. VCCA should
not exceed VCCB.
When the output-enable (OE) input is low, all outputs
are placed in the high-impedance state.
The TXB0108 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.
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.