SN65HVD70: Differential signal line characteristic impedance

Part Number: SN65HVD70

Tool/software:

Hello Team,

We are using SN65HVD70D in our application. Can you provide the characteristic impedance for RS422 differential signal lines?

Thank You.

1 month ago

0 Clemens Ladisch 1 month ago

Guru 276980 points

This device is designed for loads between 54 Ω and 100 Ω. This allows for signal lines with a characteristic differential impedance of 100 Ω (typically used for unidirectional RS-422 with one termination resistor) or 120 Ω (typically used for half-duplex RS-485 with two termination resistors).

0 AP 1 month ago in reply to Clemens Ladisch

Prodigy 50 points

Hello

Does this device work for 120-ohm characteristic impedance while using RS422 interface?

0 Clemens Ladisch 1 month ago in reply to AP

Guru 276980 points

Yes.

0 Ethan Sempsrott 1 month ago

TI__Intellectual 2576 points

I see I am a little late to this post, but Clemens is spot on here. Because this device is compliant with both RS-485 (54Ohms) and RS-422 (100Ohms) standards, it can support both characteristic impedances. Just make sure to add termination resistors correctly. This article can help: www.ti.com/.../SSZTB23

-Ethan

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SN65HVD70: Differential signal line characteristic impedance