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RS422/RS485 tranceiver power consumption

g.f.
Guru 15510 points
Other Parts Discussed in Thread: SN65HVD10

Hi,

I have a question abou RS422/RS485 Tranceiver products.

Q1.
How to calculate the power consumptions of  these tranceiver?

Q2.
Is there any tranceiver product in TI which support both RS422 and RS485?
I understood that there are tranceiver which support either RS422 or RS485.

best regards,
g.f.

  • 0
    TI__Expert 5400 points

    Hi,

    The application note Calculating Power Dissipation for Differential Line Drivers describes how to calculate power dissipation for RS-422 and RS-485 transceivers.

    In general, most RS-485 transceivers are compatible with the RS-422 standard, as RS-485 has a stronger VOD requirement.  One specification to check, however, is the Output Short Circuit Current (IOS).  RS-422 specifies a maximum of 150mA, while RS-485 allows up to 250mA, so some RS-485 transceivers are not strictly RS-422 compliant in this respect.  However this is a relatively insignificant difference, and would not preclude the use of an RS-485 transceiver in most RS-422 applications.

    Perhaps consider the SN65HVD10/11/12 family of transceivers.