TXB0304RUTR

1 FEATURES

• 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 (ICCA or ICCB)

• Ioff Supports Partial-Power-Down Mode Operation

• Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II

• ESD Protection Exceeds JESD 22

– 8000-V Human-Body Model (A114-B)

– 1000-V Charged-Device Model (C101)

2 DESCRIPTION

This 4-bit non-inverting 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 TXB0304, 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 TXB0304 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.

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