TXB0108 - 8-Bit Bidirectional Voltage-Level Shifter with Auto Direction Sensing and +/-15-kV ESD Protect

This 8-bit noninverting translator uses two separate configurable power-supply rails. TheA port is designed to track V_CCA. V_CCA accepts anysupply 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 foruniversal 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 should not exceedV_CCB.

When the output-enable (OE) input is low, all outputs are placed in the high-impedancestate.

The TXB0108 is designed so that the OE input circuit is supplied byV_CCA.

This device is fully specified for partial-power-down applications usingI_off. The I_off circuitry disables the outputs,preventing damaging current backflow through the device when it is powered down.

To ensure the high-impedance state during power-up or power-down, OE should be tied toGND through a pulldown resistor; the minimum value of the resistor is determined by thecurrent-sourcing capability of the driver.

• 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
• OE Input Circuit Referenced to V_CCA
• Low Power Consumption, 4-µA Max 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
    • 2000-V Human-Body Model (A114-B)
    • 1000-V Charged-Device Model (C101)
  • B Port
    • ±15-kV Human-Body Model (A114-B)
    • ±8-kV Human-Body Model (A114-B)
      (YZP Package Only)
    • 1000-V Charged-Device Model (C101)

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