SN65LVDS100: LVDS BUFFER Seletction

Bella (GZ) Li

Intellectual 1040 points

Part Number: SN65LVDS100
Other Parts Discussed in Thread: DS15BR401

hi,

Customer requires a BUFFER without termination resistor.

The input to the buffer is DS15BR401TSQ/NOPB(TI) output.

The SN65LVDS100 appears meet the above requirement--there are no termination resistor internal.

Solution right?

if not, can u please help me choose a suitable LVDS BUFFER

over 2 years ago

0 Clemens Ladisch over 2 years ago

Guru 316690 points

This buffer does not have integrated termination resistors.

Devices with integrated termination resistors would be named "LVDT" (instead of "LVDS") or "LT" (instead of "LV").

0 Bella (GZ) Li over 2 years ago in reply to Clemens Ladisch

TI__Intellectual 1040 points

Is it feasible to use the output signal of the DS15BR401TSQ chip (the signal output of the existing PG device) as the LVDS signal input of the SN65LVDS100 chip?

0 Clemens Ladisch over 2 years ago in reply to Bella (GZ) Li

Guru 316690 points

Yes; the DS15BR401 has LVDS outputs, and is meant to connect to LVDS inputs. The section "Internal Terminations" of the DS15BR401 datasheet says that its LVDS outputs "contain an integrated 100Ω ohm termination resistor, this resistor is used to minimize the output return loss and does not take the place of the 100 ohm termination at the inputs to the receiving device"; also see figure 14.

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SN65LVDS100: LVDS BUFFER Seletction