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SN65HVS883: SN65HVS883 external status LED connection

fenqiang wang
Prodigy 20 points
Part Number: SN65HVS883

As shown in the figure, in order to reduce the brightness of diode D01, a current-limiting resistor R0 is connected in series. Please answer whether this connection affects the overall function of the circuit

  • 0
    TI__Mastermind 26353 points

    Hey Fenqiang, 

    It's currently a US holiday. One of our engineers will provide feedback tomorrow.

    Thanks,
    Rami

  • 0 in reply to Rami Mooti1
    TI__Genius 13650 points

    Hello Fenqiang,

    The Resistor R0 will not  affect the overall function of this circuit and will only affect the brightness of the diode. This is because  the input stage at IP0(pin3) if used in a  low-to-high transition the input signal will pass three internal signal checks and the new ouput signal will be available at the parallel input of the shift register, waiting to be latched in. At the same time this signal switches the output of the current limiter from ground to the RE-output to turn on the LED. Depeding on the value of your resistor will determine the brightness of your led.

    Thanks and Regards,

    Kameron

  • 0 in reply to Kameron Hill
    Prodigy 20 points

    Thank you very much for your answer.