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Why SN65LBC180-Q1 didn't support EIA-422 ?

elsalvador
Intellectual 600 points
Other Parts Discussed in Thread: SN75ALS180, SN75176B, SN65LBC176-Q1, SN65HVD1780-Q1

Dear TI-er

SN75ALS180, SN75176B - Meet or Exceed the Requirements of TIA/EIA-422-B, TIA/EIA-485-A†

SN65LBC176-Q1, SN65LBC180-Q1, SN65HVD1780-Q1 - Meet or Exceed the Requirements of ANSI Standard RS-485 and ISO 8482:1987(E)

Why Automotive product didn't support EIA-422 ?

Plz help me.

  • 0
    TI__Mastermind 28265 points

    Hello Elsalvador,

    the automotive parts are specified for a wider temperature range for which the Vod (differential output voltage) cannot be guaranteed to be 2V over 100 ohms as per RS-422 standard. The minimum guranteed Vod is only 1.1V.

    However if you do not need standard compliance then you still can use the automotive parts. The receiver input sensitivity is +/- 200mV, so 1.1V is plenty more voltage for this small input range.

    Regards,

    Germany