DS90LV001: LVDS buffer with VCC=2.5V

Ken Zhang

Expert 3315 points

Part Number: DS90LV001
Other Parts Discussed in Thread: SN65LVDS17

Hi,

Is there any LVDS buffer with VCC=2.5V just like DS90LV001 except of VCC=3.3V;

requirements:

VCC=2.5V

LVDS; 600MBPS

LVDS channels; 1 or 2.

over 1 year ago

0 Clemens Ladisch over 1 year ago

Guru 312010 points

SN65LVDS17

0 Eric Hackett over 1 year ago in reply to Clemens Ladisch

TI__Guru 73492 points

Thanks for the help Clemens.

Ken,

An engineer has been assigned to this thread, but please be patient as they are out of office until Monday. However, Clemens suggestion is correct.

Regards,

Eric Hackett

0 Ken Zhang over 1 year ago in reply to Eric Hackett

TI__Expert 3315 points

hi, all

SN65LVDS's input just only support PECL and its output can support LVDS, it can't support LVDS input, is it right?

+1 Clemens Ladisch over 1 year ago in reply to Ken Zhang

Guru 312010 points

Yes; its inputs are described as "differential" but are PECL.

For how to connect LVDS signals to a PECL input, see figure 9 of DC-Coupling Between Differential LVPECL, LVDS, HSTL, and CM. But note that the voltage dividers are designed to get 2 V from a 3.3 V supply; for 2.5 V, use 62 Ω and 250 Ω.

0 Amy over 1 year ago

TI__Genius 15321 points

Hello,

I put the criteria above into the LVDS search tool. Here is the link with the options:

LVDS, M-LVDS & PECL ICs product selection | TI.com

The SN65LVDS's can be configured to accept single-ended PECL signals by using the internal Vref / Vbb. If you wish to configure for LVDS, leave this pin unconnected or open and ensure that the input signal meets all recommended operating conditions, such as for Vic (common mode input voltage). As shown in Clemens's figure, external modifications would be required to achieve these operating conditions if interfacing LVDS <-> LVPECL signals.

Regards, Amy

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DS90LV001: LVDS buffer with VCC=2.5V