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SN74CB3Q3251: I’m looking for an 8:1 and 4:1 LVDS mux capable of handling 500MHz signaling speeds

Adam Torma
Mastermind 45340 points
Part Number: SN74CB3Q3251
Other Parts Discussed in Thread: SN74CB3Q3253,

e2e,

I'm looking for an 8:1 and 4:1 LVDS mux capable of handling 500MHz signaling speeds. I’ve found the below devices and they look appropriate, will these work at 500MHz?

 

SN74CB3Q3253 (ACTIVE)

Dual 1-of-4 FET Multiplexer/Demultiplexer 2.5-V/3.3-V Low-Voltage High-Bandwidth Bus Switch


Thanks in advance,

Adam

  • 0
    TI__Intellectual 2900 points
    Hi Adam,

    Roughly speaking, both devices can support up to 500MHz bandwidth. However, whether or not it can meet your LVDS requirements also depends on the signal fundamental frequency and its waveform. In other words, it depends on how much margin you want to leave to the system.

    For example, the data rate is 100Mbps square wave, having a 500MHz multiplexer should be good enough. If the LVDS data rate is up to 150Mbps square wave, theoretically, only the 3rd harmonic can pass through the multiplexer. Board parasitics, temperature, receiver detection performance are also in need of considerations.