TXB0108PWRG4: 8-bit bidirectional voltage-level translator, 1.2V-3.6V A port, 1.65V-5.5V B port, ±15-kV ESD protection
Texas Instruments

The TXB0108PWRG4 from Texas Instruments is an 8-bit bidirectional voltage-level translator designed for multi-voltage digital system applications. It features two separate configurable power-supply rails, with the A port supporting 1.2V to 3.6V and the B port supporting 1.65V to 5.5V, ensuring compatibility with a wide range of digital logic levels. The device automatically senses the direction of data flow without the need for a direction control signal, simplifying design and reducing board space.

Key features include VCC isolation, which places all outputs in a high-impedance state if either VCC input is at GND, ensuring minimal power consumption and protecting the device during power-down. The OE (Output Enable) input is referenced to VCCA, allowing for easy integration into various system designs. Additionally, the TXB0108PWRG4 offers robust ESD protection, exceeding ±15-kV Human-Body Model for the B port, providing enhanced reliability for applications in harsh environments.

Key Specifications and Features

  • Bidirectional voltage translation between 1.2V to 3.6V (A port) and 1.65V to 5.5V (B port)
  • Auto-direction sensing, no direction control required
  • VCC isolation feature when either VCC input is at GND
  • Low power consumption, 4-μA max ICC
  • Output Enable (OE) input referenced to VCCA
  • Latch-Up performance exceeds 100 mA per JESD 78, Class II
  • ESD protection: ±15-kV Human-Body Model (B port)

TXB0108PWRG4 Datasheet

TXB0108PWRG4 datasheet (PDF)

TXB0108PWRG4 Substitutes
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Applications

  • Mobile handsets
  • Smartphones
  • Tablets
  • Desktop PCs

Category

Interface ICs

General information

Voltage-level translators are essential components in modern electronic systems that interface between circuits operating at different voltage levels. These devices ensure proper communication between components by matching the voltage levels of digital signals, thereby preventing damage and ensuring reliable operation. When selecting a voltage-level translator, key considerations include the voltage range compatibility, bidirectional capability, power consumption, and ESD protection levels.

The TXB0108 series is designed to meet the needs of applications requiring flexible and reliable voltage translation between different logic levels. It supports bidirectional communication without the need for a direction control signal, thanks to its auto-direction sensing feature. This simplifies circuit design and reduces the need for additional components. The device's low power consumption and robust ESD protection make it suitable for a wide range of applications, from mobile devices to desktop PCs.

In addition to technical specifications, practical considerations such as package type, thermal management, and layout guidelines are important when integrating the TXB0108 into a design. The availability of multiple package options allows for flexibility in design and application. Furthermore, understanding the device's operation, including the VCC isolation feature and the function of the OE input, is crucial for maximizing its performance and reliability in a system.

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