About the minus voltage output of "SN55LBC173"

hisakichi kobayashi

Other Parts Discussed in Thread: SN55LBC173, SN55LBC175, DS26LV32-MD8

Hi all.

There is a question about "SN55LBC173."
Is "-5V" output possible in the following pin states?
About 1.5V is inputted into B-input.
3.3V or 0V is inputted into A input.
VCC is connected to 0V and GND is connected to -5V.

Is the same usage possible also about "SN55LBC175"?
and, Is the same usage possible also about "DS26LV32-MD8"?

Best Regards.
Hisa Kobayashi.

over 11 years ago

0 Bryce Sinclair over 11 years ago

TI__Intellectual 970 points

Greetings Kobayashi-san,

It should be possible to make the R-Output -5V to 0V, but you will also need to make the D-Pin, DE, and /RE pins -5V to 0V to work correctly. All RS-485 devices should operate in the described condition as the bus common-mode operation range is -7V to 12V from device reference.

Regards,

Bryce

0 hisakichi kobayashi over 11 years ago in reply to Bryce Sinclair

Intellectual 950 points

Hello. Mr. Bryce
Thank you for the reply.
Your reply was consulted very much.
The circuit concerned is operating in the customer.

Regards,

Hisa kobayashi

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About the minus voltage output of "SN55LBC173"