Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
10 years ago

LVDS vs Differential HSTL/SSTL

Hi All,

What's the difference between the LVDS vs Differential HSTL/SSTL pins? Are the both differential, aren't them?

Thank you

3 Replies

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    10 years ago

    LVDS is generally using dedicated differential buffer. Differential HSTL/SSTL is using two single ended buffer with one inverted.

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    10 years ago

    Just to add that dedicated differential buffer can run at faster speed as compare to two single ended buffers.

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    10 years ago

    The termination required for the LVDS and differential hstl/sstl is also different. You can check the termination scheme in the device handbook IO chapter.