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# SN65LVDS117: Not sure if I should buy SN65LVDS117 for dividing input clock signal 50MHz.

Part Number: SN65LVDS117
Other Parts Discussed in Thread: LMK1C1104, SN74AHC125, LMK1C1108, SN74LV125A, SN74LVC125A, SN74LV541A, SN74LVC541A, SN74AHC541

Good morning,

I want to implement a design that consists of a 30-50MHz clock signal being split between 4-8 channels. Let me explain, I want an integrated in which I put a digital input signal that will vary between 3.3V and GND and I want the integrated to get X outputs between 3.3V and GND.
I have been looking at the repeaters you have and I have seen the Differentials, among them the SN65LVDS117. Actually my signal is not going to be differential because input A will vary between 3.3V and GND but input B will always be GND.
From what I have seen of this integrated if the difference between A and B is > 100mV it sets the Y channels of the outputs to High, and the Z channels of the outputs to Low. However, when the input clock signal A goes below 3.3V to GND there may be a transient and over oscillation that the GND connected to B has higher voltage than in A and set Z to High and Y to Low, which is a very big problem. I always want Z to be at Low and Y to be the one that varies between High and Low.
In addition I have noticed that the outputs are 340mV when I want the voltage to be 3.3V-0V.
Therefore, I wanted to know if you have a repeater with the characteristics I have mentioned, if it could be that it is not differential and that the output oscillates between 3.3V and GND.

I expect you could help me. Thank you in advance.

Have a nice day,

Pedro

• LVDS repeaters are designed for LVDS signals.

There are clock buffers like the LMK1C1104/LMK1C1108. But you could also use plain logic buffers like the SN74LVC125A/SN74LVC541A/SN74AHC125/SN74AHC541/SN74LV125A/SN74LV541A.

• Hi Pedro,

The maximum voltage swing for LVDS is 450 mV. As Clemens mentioned, a clock buffer or logic buffer would work for what you have described.

To refine your search, try using the filter tool on the respective pages:

Regards, Amy

• Thanks Clemens!

• Thanks Amy :)