TXB0104

• 1.2-V to 3.6-V on A Port and 1.65-V to 5.5-V
  on B Port (V_CCA ≤ V_CCB)
• V_CC Isolation Feature: If Either V_CC Input Is at GND, All Outputs Are in the High-Impedance State
• Output Enable (OE) Input Circuit Referenced to V_CCA
• Low Power Consumption, 5-µA Maximum I_CC
• I _OFF Supports Partial Power-Down Mode Operation
• Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II
• ESD Protection Exceeds JESD 22
  • A Port:
    • 2500-V Human-Body Model (A114-B)
    • 1500-V Charged-Device Model (C101)
  • B Port:
    • ±15-kV Human-Body Model (A114-B)
    • 1500-V Charged-Device Model (C101)

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This TXB0104 4-bit noninverting translator uses two separate configurable power-supply rails. The A port is designed to track V_CCA. V_CCA accepts any supply voltage from 1.2 V to 3.6 V. The B port is designed to track V_CCB. V_CCB 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. V_CCA must not exceed V_CCB.

When the 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 must be tied to GND through a pulldown resistor The current sourcing capability of the driver determines the minimum value of the resistor.

The TXB0104 device is designed so the OE input circuit is supplied by V_CCA.

This device is fully specified for partial power-down applications using I _OFF. The I _OFF circuitry disables the outputs, which prevents damaging current backflow through the device when the device is powered down.