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SN74GTL1655: Dual side translation

Luke Sun
Intellectual 1830 points
Part Number: SN74GTL1655

Hi team,

I read datasheet of SN74GTL1655, and found A port & B port can both be active when OEAB/ & OEBA/ are both low.

Does it mean that it supports auto-direction translation between two sides?

Thank you!

  • 0
    TI__Guru* 96711 points
    Hi Luke,
    No, the device cannot support auto-bidirectional translation. For that, please see our TXB, TXS, or LSF line of devices located here: www.ti.com/.../products.html

    An output being 'Active' means that it is driving the line. If another device tries to also drive the line, this is called 'bus contention' and will likely damage one or both devices.

    Auto-bidirectional devices accomplish this feat by having either (1) no drive strength (LSF and TXS devices), or (2) very low drive strength (TXB devices) so that they can be overdriven.