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TI Home » TI E2E Community » Support Forums » Interface » /etc... Interface » Voltage Level Translation Forum » SN74LVC8T245 max input voltage
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SN74LVC8T245 max input voltage

This question is answered
Andres Torti
Posted by Andres Torti
on Jul 27 2012 11:51 AM
Prodigy30 points

Hello, I am designing my device to use SN74LVC8T245. I am using B as input whit 3.3V supply and A as output using 3.3V supply also. According to datasheet at page 4:

Input voltage can be as high as 5.5V no matter my supply voltage in B which is the input is 3.3V ? Is that right or I am not understanding correctly ?

input voltage SN74LVC8T245
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  • Andres Torti
    Posted by Andres Torti
    on Jul 28 2012 19:32 PM
    Prodigy30 points

    Active state is output ? Or Active State is input and 3-state is output not enabled ?

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  • Junjie Mai
    Posted by Junjie Mai
    on Jul 29 2012 22:00 PM
    Verified Answer
    Verified by Andres Torti
    Intellectual2990 points

    Hi, Andres,

    Yes, you are right. For you application, the input voltage can be as high as 5.5V no matter the supply voltage in B which is the input is 3.3V.

    For the data in datasheet. the "active state" with Vcco max meas for output when in the enable state. The "3- state" column means the input range. The reason is this bi-directional buffer have two pathes, for example, when A-B is the transfer direction, the B-A path is in the 3-state. And can be provide 5.5V input at A side.

    Any further thing, please let me know.

    BR

    Junjie

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