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SN74AUP1T34: Fmax for VCCA-1V and VCCB-3.3V

Cedrick
Expert 8270 points
Part Number: SN74AUP1T34
Other Parts Discussed in Thread: SN74AXC1T45, 5-8-LOGIC-EVM

Hi Team,

Our customer wants to know if the SN74AUP1T34 can support 100MHz when the VCCA=1V and VCCB=3.3V. Also, they want to know what will be the fmax for this condition. 

On other logic devices (like buffer) the way to check this is to refer to the clocked counter parts. However I'm not sure for the translator if this is applicable. I also found this document: http://www.ti.com/lit/an/scya049a/scya049a.pdf#page=3&zoom=100,0,100 but our customer really want to know if  the SN74AUP1T34 can support 100Mhz with the condition stated above.

Thank you 


Regards,

Cedrick

  • 0
    TI__Guru 55970 points

    Hi Cedrick,

    You could consider using the SN74AXC1T45 which could support this datarate. The output driver is an important factor but the input voltage level at 1V will also be a limiting factor in the drive strength of the input signal to support the high slew rate for high speed applications.

  • 0
    TI__Mastermind 42600 points

    Hey Cedrick,

    Edit: On top of the feedback Shreyas gave, see below.

    This device is very similar to a normal buffer so the estimation can be applied here. There won't be a fmax I can give you and I can't really say for sure if 100 Mhz will work. Since the frequency of operation will depend  heavily on the load, I'd recommend testing this using our 5-8-Logic-EVM. This will allow the customer to add the expected load as well and get a very accurate observation of whether or not the device can handle that speed. With light loading I do think it will work fine.