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TXB0106-Q1 using with QSPI @ 64MHz

Josef Warta
Expert 4300 points
Other Parts Discussed in Thread: TXB0106-Q1, TXB0302, TXB0304, TXB0106

Hello Team,

can our TXB0106-Q1 used for QSPI @ 64MHz?

Application is a 5V micro controller interfacing a QSPI Flash with 3.3V.

Thanks

Josef

  • 0
    TI__Mastermind 29735 points

    Hello Josef,

    Based on the datasheet timing requirements on page 5 the TXB0106-Q1 will only support a data rate of up to 100Mbps (roughly 50MHz).

    I noticed you are using a Q1 part. Does the part need to be automotive qualified? Also, as SPI interface is generally fixed, does your application require an auto-direction sensing translator? This can help us narrow down a part that will meet your needs. 

  • 0
    TI__Expert 6335 points
    Josef,

    As discussed offline, TXB0106 would be the correct choice for QuadSPI. In your application, the maximum data rate of 64 MHz is not supported by the TXB0106. I would suggest looking at the TXB0302 or TXB0304 instead.

    As far as I know, QuadSPI consists of six pins:

    1. SS (Slave Select) - From SPI master to SPI slave (More slave devices would require more SS pins).
    2. SCK (Serial Clock) - From SPI master to SPI slave
    3. IO1 - Bi-directional data line : Data can be transmitted/received by both the SPI master and slave
    4. IO2 - Bi-directional data line : Data can be transmitted/received by both the SPI master and slave
    5. IO3 - Bi-directional data line : Data can be transmitted/received by both the SPI master and slave
    6. IO4 - Bi-directional data line : Data can be transmitted/received by both the SPI master and slave

    The advantage of this approach is that more data can be read in a single clock cycle. The disadvantage is the added pin count.

    This would call for an auto-direction sensing translator. The TXB0106 would be the best fit if the data rate is 100 Mbps or less.

    Best Regards,
    Nirav