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Question about SN74AVCA164245 and TXB0108

Ho Cheol Song1
Prodigy 120 points
Other Parts Discussed in Thread: TXB0108, SN74AVCA164245, SN74CBTLV16292

Dear Tier,

I have one question about SN74AVCA164245 and TXB0108.

One of my customer is using SN74AVCA164245 for SRAM interface. But as you know, SN74AVCA164245 needs direction control, and then she wants to use new device which doesn't need direction control(Auto direction control). So she is considering to use 2 piece of TXB0108.

My question is... Is it possible to use TXB0108 for SRAM interface? Is there any problem for using TXB0108?

Please advise me.

 

One more thing...

In case of SN74CBTLV16292, what is the maximum Band width which can be covered? Customer is using this device for 150MHz signal path. Is there any problem?

Please advise me.

 

Thanks and Regards.

  • 0
    Prodigy 120 points

    Please give me any response...

  • 0 in reply to Ho Cheol Song1
    Prodigy 120 points

    Is there anybody who can response for me?

  • 0
    TI__Mastermind 30310 points

    Hello,

    Can you please explain the requirements of the system on the A-side and the B-side of the system?

    I am not that familiar with SRAM and some important things I would like to know are:

    What are the voltage levels on both sides?

    Is the I/O structure open-drain or push-pull?

    What is the maximum data rate for data transmission?

    What are the loading conditions on the A- and B-side?

    A block diagram of the system could also help.

    -Brian

  • 0
    TI__Mastermind 30310 points

    Also, can you please post your question about the SN74CBTLV16292 in a different thread to avoid confusion with the TXB0108 question?

    -Brian

  • 0 in reply to Brian Berner
    Prodigy 120 points

    Please refer to the below.

     

    What are the voltage levels on both sides?

    A> Vcca=1.8V, Vccb=3.3V

    Is the I/O structure open-drain or push-pull?

    A> Push-pull

    What is the maximum data rate for data transmission?

    A> typ 25MHz, max 50MHz

    What are the loading conditions on the A- and B-side?

    A> What does 'the loading conditions' mean? It's just SRAM interface. A-side is Application Processor, 1.8V. B-side is SRAM, 3.3V.

     

    Thanks.

  • 0 in reply to Ho Cheol Song1
    TI__Mastermind 30310 points

    What are the voltage levels on both sides?

    A> Vcca=1.8V, Vccb=3.3V --> YES, the TXB0108 will work with these supply voltages

    Is the I/O structure open-drain or push-pull?

    A> Push-pull --> YES, the TXB0108 is designed for push-pull type applications that do NOT require pull-up resistors

    What is the maximum data rate for data transmission?

    A> typ 25MHz, max 50MHz  --> YES, the datasheet is spec'd for 20-100Mbps

    What are the loading conditions on the A- and B-side?

    A> What does 'the loading conditions' mean? It's just SRAM interface. A-side is Application Processor, 1.8V. B-side is SRAM, 3.3V.

    The intention of this last question refers to the fact that because the TXB0108 is auto-direction sensing, it should only be used in point-to-point level translation (as opposed to long buses) because it has a low driving strength. The auto-direction sensing relies on the communication ports to over-drive it to switch directions. VOH and VOL are only spec'd at IOH = -20uA and IOL = 20uA

    Thanks,

    Brian