SN65HVD70: the power consumption of RS485

suyi suyi

Part Number: SN65HVD70

The terminal device is a slaver with SN65HVD7x,and the device runs at the status of low consumption of power,so that it can not support the IO "output current ,driver and receiver" mentioned in datasheet of SN65HVD7x。

1:as the device is a slaver ,how much power the SN65HVD7x consume when receiver datas from the terminal device?

over 5 years ago

0 Ravi Singh over 5 years ago

TI__Mastermind 22965 points

Hi Suyi,

Are you referring to the device quiesent current in recieve mode? -- Here is a snapshot from the datasheet (below).

0 suyi suyi over 5 years ago in reply to Ravi Singh

Prodigy 110 points

here is another snapshot from the datasheet ,and i want to know whether or not Io(as a driver or receiver) consume the power from the slaver device.

0 Hao L over 5 years ago in reply to suyi suyi

TI__Mastermind 25705 points

Suyi,

If SN65HVD70 works in the driving mode, 60mA is the maximum driving current. However the device itself doesn't consume all the power, while part of it is consumed by the load. Please refer to this blog for calculation. If SN65HVD70 works in the receiving mode, 8mA is the maximum receiver output current. The exact power dissipation depends on the loading condition of the R pin.

Regards,

Hao

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SN65HVD70: the power consumption of RS485