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Texas Instruments TUSB2E221 USB 2.0-eUSB2 Dual Repeater

Texas Instruments TUSB2E221 USB 2.0-eUSB2 Dual Repeater enables USB 2.0-compliant port implementation on newer processors using lower voltage processes. The device is a USB eUSB2-USB 2.0 repeater supporting device and host modes. The TUSB2E221 supports USB low-speed (LS) and full-speed (FS) signals and high-speed (HS) signals. The TUSB2E221 is designed to interface with eUSB2 eDSPr or eUSPr operating at 1.2V single-ended signaling. The device has multiple patented designs to provide robust interoperability, optimum performance, and power.

For systems without an I2C interface, the Texas Instruments TUSB2E221 offers eight individual settings with three strap-pins for USB 2.0 channel Equivalent Series Resistance (ESR) up to 17.5Ω. Device variants are available for different eUSB2 trace length compensation levels up to 10 inches. The I2C interface permits additional flexibility for users to fine-tune the device's RX and TX settings. The available settings are RX equalization, RX squelch threshold, RX disconnect thresholds, TX amplitude, TX slew rate, and TX pre-emphasis.

The three EQ pins provide various debug options, including monitoring various USB bus states or interrupts and CTA-936 UART mode control, which can provide SoC debug capabilities. EQ0 and EQ1 can also be used as general-purpose I2C to GPIO bridges.

Features

  • Compliance with USB 2.0 and eUSB2 (rev 1.2)
  • Support for low-speed (LS), full-speed (FS), high-speed (HS)
  • Best-in-class high-speed total jitter of 20ps
  • Register access protocol receptor capable
  • Dual independent repeater
  • 2:2 crossbar mux (DSBGA package only)
  • Host and device mode (DRD) support
  • Selection between 1.2V and 1.8V control or I2C levels using VIOSEL pin
  • Auto-detection for I2C or strap-pin options
    • Three strap-pins for USB 2.0 high-speed channel compensation settings
    • I2C device interface for more configurations
  • Device variants
    • eUSB2 1.0V or 1.2V signaling interface
    • Four eUSB2 trace loss compensation levels for different product form factors: 2.5, 5, 7.5, and 10 inches
  • Supports auto-resume ECR as well as L2 interrupt resume mode
  • CTA-936 USB Carkit UART support
  • Optional BC1.2 CDP battery charging and detection support
  • Optional GPIO modes for EQ pins for debug and I2C ↔ GPIOs through EQ0/1
  • I2C accessible debug capabilities for manufacturing tests

Applications

  • Communications equipment
  • Enterprise systems
  • Notebooks and desktops
  • Industrial
  • Tablets
  • Portable electronics

Additional Resources

Simplified Schematic

Schematic - Texas Instruments TUSB2E221 USB 2.0-eUSB2 Dual Repeater

Development Tool

Texas Instruments TUSB2E221QFNEVM Repeater Evaluation Module

Facilitates the evaluation and validates the performance of the TUSB2E221 2-port eUSB repeater.

Learn Moreabout Texas Instruments TUSB2E221QFNEVM Repeater Evaluation Module View Productsrelated to Texas Instruments TUSB2E221QFNEVM Repeater Evaluation Module
Published: 2024-12-12 | Updated: 2025-03-31