2-BIT BIDIRECTIONAL VOLTAGE-LEVEL TRANSLATOR WITH AUTO DIRECTION
SENSING
DESCRIPTION
The UTXB0102 device is a 2-bit noninverting translator that 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 must not exceed VCCB.
When the output-enable (OE) input is low, all outputs are placed in
the high-impedance state.
This device is fully specified for partial-power-down applications
using IOFF. The IOFF circuitry disables the outputs when the device is
powered down. This inhibits current backflow into the device which
prevents damage to the device.
OE must be tied to GND through a pull-down resistor to assure the
high-impedance state during power up or power down; the minimum
value of the resistor is determined by the current-sourcing capability of
the driver.
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 |