SN74LXC1T45: Output impedance

Navneet Gandhi

Part Number: SN74LXC1T45

Hi,

What's the input and output impedance of this level translator?

How would I go about matching this translator to (say) a 50-ohm trace. Are there any guidelines on what kind of termination to use on the inputs and outputs?

Thanks,
Navneet

over 1 year ago

+1 Clemens Ladisch over 1 year ago

Guru 295110 points

The input impedance is approximately infinite, see [FAQ] What is the impedance of the device's input pin? Is it CMOS or bipolar device?

The output impedance is somewhere between about 10 Ω and 75 Ω, depending on the output supply voltage; see [FAQ] What is the output voltage (VOH or VOL) when the output current is X or the supply voltage is Y?

To terminate a trace, you would typically use a source termination resistor; see [FAQ] What happens when I connect a logic device's output to a 50 ohm transmission line?

0 Navneet Gandhi over 1 year ago in reply to Clemens Ladisch

Prodigy 60 points

Great, thank you!

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SN74LXC1T45: Output impedance