SCEA118 June   2022 AM623 , AM625 , AM6412 , AM6421 , AM6422 , AM6441 , AM6442 , TXS0108E

 

  1.   1
  2. 1Translate Voltages for SPI
  3.   Design Considerations
  4.   Recommended Parts
  5. 2Translate Voltages for UART
  6.   Design Considerations
  7.   Recommended Parts
  8. 3Translate Voltages for I2C
  9.   Design Considerations
  10.   Recommended Parts
  11. 4Translate Voltages for GPIO
  12.   Design Considerations
  13.   Recommended Parts
  14. 5Translate Voltages for SDIO
  15.   Design Considerations
  16.   Recommended Parts
  17. 6Translate Voltages for RGMII
  18.   Design Considerations
  19.   Recommended Parts
  20. 7Translate Voltages for MDIO
  21.   Design Considerations
  22.   Recommended Parts
  23. 8Translate Voltages for a SIM Card
  24.   Design Considerations
  25.   25

Design Considerations

  • Board layout is critical to the success of RGMII translation; we recommend using signal integrity simulations and prototyping for any design
  • Use active translators for maximum data rate
  • Use one device for all TX signals and one for all RX signals to minimize channel-to-channel skew
  • See Low Voltage Translation For SPI, UART, RGMII, JTAG Interfaces for details regarding the performance of SN74AXC8T245 in RGMII applications
  • Place translators closest to the low-voltage device, if possible, to improve signal integrity
  • Consider source-terminating signals if sent over 12 cm (4700 mil) or longer traces
  • Need additional assistance? Ask our engineers a question on the TI E2E™ Logic Support Forum