SN65LBC180: /RE pin connection

Masayoshi Takahashi

Intellectual 1530 points

Part Number: SN65LBC180

Hi team,

My customer doesn't need enable function.

So, the customer should tied /RE pin to GND. Is my understanding correct?

Regards,

Yoshi

over 5 years ago

0 Miguel Robertson over 5 years ago

TI__Guru 62920 points

Yoshi-san,

Yes, you are correct. /RE can be tied to GND. This will make the receiver always enabled, meaning the state of the A/B lines will be reflected on the R output pin. Please let us know if you have further questions.

Regards,
Max

0 Masayoshi Takahashi over 5 years ago in reply to Miguel Robertson

TI__Intellectual 1530 points

HI Max,

Thanks for your quick reply.

Also, the customer should tied DE to VDD. Is it also correct?

Regards,

Yoshi

0 Miguel Robertson over 5 years ago in reply to Masayoshi Takahashi

TI__Guru 62920 points

Yoshi-san,

Tying DE to the VCC rail is OK for the device. Under this configuration, though, you should make sure that no other nodes will need to use the Y/Z lines to transmit data. For example, this would be a valid configuration for a point-to-point (two-node) network or for a "master" node in a multi-point full duplex network. It would not work for a "slave" node in a multi-point full-duplex network, though. (Please see Figure 20 in the datasheet for an example illustration of such a network.)

Regards,
Max

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SN65LBC180: /RE pin connection