• State Resolved
  • Locked Locked
  • Replies 2 replies
  • Subscribers 33 subscribers
  • Views 944 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

About STB pin of SN65HVDA1040A-Q1.

Masami Michino
Genius 5070 points
Other Parts Discussed in Thread: SN65HVDA1040A-Q1

Dear, All

There is a question to STB pin of SN65HVDA1040A-Q1 from a customer.
The question contents are following 2.
(1) There is a diode in a block diagram of STB pin from VCC, and next there is constant current source.
 Is this constant current source equivalent pull-up resistor?
(2) Please tell min and max of the resistance value in case of equivalent pull-up resistor.

Thanks, Masami M.

  • 0
    TI__Guru 62920 points
    Hello Michino-san,

    Yes, this current source does act as a pull-up resistor in the sense that it helps to bias the input to a high state when it is left floating (high impedance) in the application. The resulting input current ranges for both high- and low-level inputs are given in the Electrical Characteristics table as items 10.3 and 10.4 (see page 9 of the current version of the datasheet). These ranges can be used to determine the required strength of any external circuitry driving this pin.

    Please let me know if you have any other questions.

    Best regards,
    Max
  • 0 in reply to Miguel Robertson
    Genius 5070 points

    Hi, Max-san,

    Thank you for your reply.
    I answer it to the customer.

    Thanks, Masami M.