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SN74AVCA406L: SN74AVCA406L and TXS02612, questions

Taketo Sato
Genius 10325 points

Part Number: SN74AVCA406L

Hello team,

I am considering level shifter for SD card and I have questions about SN74AVCA406L and TXS02612 below.

1) SN74AVCA406L's fmax spec of clock and data is described as 95MHz in its datasheet when VCCA=1.8V, VCCB=3.3V. Is this 95MHz data meaning 190Mbps?
     If no and it means 95Mbps, does the device support DDR50?
     For TXS02612, it specifies these in MHz for clock and Mbps for data.

2) SD card side supply(VCCB or VCCA) is start with +3.3V. However it needs to reduce to +1.8V during initialization sequence. Can these device accept VCCB or VCCA change during operation?
     I am afraid if the condition may cause some issue.

3) Do we have voltage level shifter IC for SD that supports SDR104?

Best regards,

  • 0
    TI__Genius 16735 points
    Hello Sato-San

    1. The fmax spec of 95MHz does mean 190Mbps.
    2. There should be no problem in reducing the supply during the initialization step. As long as the device is not in operation when the voltage is being reduced, there should be no problem.
    3. Can you give more information of what you are looking for? Frequency, # of data lines, bidirectional or unidirectional and the voltages?
    If you have this information you can actually go ahead use our parametric search to find the best device for you or you can go ahead and ask back on here and I can help.

    Thanks!
    - Karan