TXS0102DCUR Integrated Circuits (ICs)

1. Description

This two-bit non-inverting translator is a bidirectional voltage-level translator and can be used to establish digital switching compatibility between mixed-voltage systems. It uses two separate configurable powersupply rails, with the A ports supporting operating voltages from 1.65 V to 3.6 V while it tracks the VCCA supply, and the B ports supporting operating voltages from 2.3 V to 5.5 V while it tracks the VCCB supply. This allows the support of both lower and higher logic signal levels while providing bidirectional translation capabilities between any of the 1.8-V, 2.5-V, 3.3-V, and 5-V voltage nodes.

When the output-enable (OE) input is low, all I/Os are placed in the high-impedance state, which significantly reduces the power-supply quiescent current consumption. 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.

2. Features

    1. No Direction-Control Signal Needed

    2. Maximum Data Rates

         – 24 Mbps (Push Pull)

         – 2 Mbps (Open Drain)

    3. Available in the Texas Instruments NanoStar™ Package

    4. 1.65 V to 3.6 V on A Port and 2.3 V to 5.5 V on B Port (VCCA ≤ VCCB)

    5. VCC Isolation Feature: If Either VCC Input Is at GND, Both Ports Are in the High-Impedance State

    6. No Power-Supply Sequencing Required: Either VCCA or VCCB Can Be Ramped First

    7. Ioff Supports Partial-Power-Down Mode Operation

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

    9. ESD Protection Exceeds JESD 22

          – A Port:

             2500-V Human-Body Model (A114-B)

             250-V Machine Model (A115-A)

             1500-V Charged-Device Model (C101)

          – B Port:

             8-kV Human-Body Model (A114-B)

             250-V Machine Model (A115-A)

             1500-V Charged-Device Model (C101)

3. Applications 

    1. I2C / SMBus 

    2. UART 

    3. GPIO

4. Typical Application Block Diagram for TXS0102DCUR

5. Pin Configuration and Functions

6. Functional Block Diagram