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SN65HVD72: low power RS485 request to replace MAX3471

Iven Xu
Intellectual 2090 points
Part Number: SN65HVD72

Dear RS485 expert,

we would like to learn from you about whether TI have the very low power RS485 can be used to compete with MAX3471?

3.3V

Half-duplex

low power

MAX3471:

We found SN65HVD72 is still with high power consumption with MAX3471, please correct me if any misuderstanding. thanks.

Best Regards

Iven

  • 0
    TI__Guru 62920 points
    Hi Iven,

    It looks like HVD72 is actually a little lower power when the device is disabled (/RE high, DE low) - it has typical ICC of 100 nA rather than 1.6 uA. The MAX3471 does have lower ICC when only the receiver is enabled, but it achieves this by using a much wider input threshold range - it specs a minimum differential input threshold of -450 mV rather than the stricter -200 mV threshold that is required by the RS-485 standard. We currently do not have a device with this sort of behavior.

    Best regards,
    Max
  • 0 in reply to Miguel Robertson
    TI__Intellectual 2090 points

    Hi Max,

    understood.

    In customer's application, they need to keep the receiver be enabled all the time for receiving the wake up information and keep the driver be disabled for the low power consumption.

    So based on this requirement, MAX3471 has the very low power 1.6uA when just keep the driver disable and keep the receiver enable.

    And we do not have any port to target this requirement. Thanks.

    Best Regards

    Iven