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We are using SN74LVC1T45 IC for level translation and we are feeding translated voltage through BNC connectors (75 ohms) to other peripherals, during this we want to achieve impedance matching of 75 ohms.

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  • \$\begingroup\$ Two posts within 45 mins that are identical is not good. \$\endgroup\$ – Solar Mike Apr 27 at 7:59
  • \$\begingroup\$ So, what's the reason for impedance matching here? remember, "impedance" isn't a thing to achieve on its own, but for underlying technical reasons, like minimum transmission losses or maximum power transfer, but I think you might be forgetting that you're looking at a driver circuit. \$\endgroup\$ – Marcus Müller Apr 27 at 8:49
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    \$\begingroup\$ Downvoted: I don't see how there can be a meaningful, helpful answer. The correct answer depends on the application. It might range from "you don't need to match the impedance" over parallel 75 ohm resistors at the receiver to active termination circuitry. The naming of a specific driver indicates to me that the you have a specific application in mind, and this question is not supposed to be an open question of the kind "when and why do we need impedance matching and what are best-practice solutions for it?". Please give more background! \$\endgroup\$ – Michael Karcher Apr 27 at 9:01
  • \$\begingroup\$ we are using SN74LVC1T45 IC for level translation and we are feeding translated voltage through BNC connectors (75 ohms) to other peripherals , during this we want to achieve impedance matching of 75 ohms. \$\endgroup\$ – mightybeard Apr 27 at 9:03
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    \$\begingroup\$ The only mention of "high impedance" in the datasheet is for when the IC is in the "disabled" state. Other wise, it is actively driving its outputs. I make the output impedance to be around 170 ohms. It isn't given explicitly, but the datasheet gives typical output current at different voltages. \$\endgroup\$ – JRE Apr 27 at 10:11

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