TXB0104 pdf datasheet download Texas Instruments

TXB0104

4-BIT BIDIRECTIONAL VOLTAGE-LEVEL TRANSLATOR
WITH AUTOMATIC DIRECTION SENSING AND ±15-kV ESD PROTECTION

FEATURES

• 1.2 V to 3.6 V on A Port and 1.65 V to 5.5 V on
 B Port (VCCA ≤ VCCB)
• Latch-Up Performance Exceeds 100 mA Per
JESD 78, Class II

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 ICC
• Ioff Supports Partial-Power-Down Mode
Operation
• 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)

DESCRIPTION/ORDERING INFORMATION

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.

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