Description
This 4-bit noninverting translator uses two separate configurable power-supply rails..The A port is designed to track Vcca. Vcca accepts any supply voltage from 1.2 V to 3.6 V. The B port is designed to track Vccb. Vccb accepts any supply voltage from 1.65 V to 5.5 V. This allows for universal low-voltage bidirectional translation between any of the 1.2-V, 1.5-V, 1.8-V, 2.5-V, 3.3-V, and 5-V voltage nodes. Vcca should not exceed Vccb..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 TXB0104 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.
