The TXU0102-Q1 is a 4-bit translating transceiver that uses two individually configurable power-supply rails. The device is operational with V_CCA and V_CCB supplies as low as 1.1 V and as high as 5.5 V. Additionally, the device can be operated with V_CCA = V_CCB. The A port is designed to track V_CCA, and the B port is designed to track V_CCB.

The TXU0102-Q1 device is designed for asynchronous communication between data buses, and transmits data with fixed direction from the A bus to the B bus on some channels and from the B bus to the A bus on the remaining channels. The output-enable input (OE) is used to disable the outputs so the buses are effectively isolated. The output-enable pin of the TXU0102-Q1 (OE) can be referenced to either V_CCA or V_CCB. The OE pin can be left floating or externally pulled down to ground to ensure the high-impedance state of the level shifter outputs during power up or power down.

This device is fully specified for partial-power-down applications using the I_off current. The I_off protection circuitry ensures that no excessive current is drawn from or sourced into an input or output while the device is powered down.

The VCC isolation or VCC disconnect feature ensures that if either VCC is less than 100 mV or disconnected with the complementary supply within recommended operating conditions, then the outputs disable and are set to the high-impedance state while the supply current is maintained. The I_off-float circuitry ensures that no excessive current is drawn from or sourced into an input or output while the supply is floating.

Glitch-free power supply sequencing allows either supply rail to be powered on or off in any order while providing robust power sequencing performance.