• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 34 subscribers
  • Views 176 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.

DS16F95QML-SP: design guidelines for DS16F95QML-SP when powered at 5V but interfaced with 3.3V MCU + Single event effects test documentation

Pierre Robitaille
Prodigy 20 points

Part Number: DS16F95QML-SP
Other Parts Discussed in Thread: DS16F95QML

Hello. 

We need help for DS16F95QML  : 

  • Could you provide design guidelines for use case where supply is 5V , but logic control is 3.3V for MCU ? Will there be contention ( if clamping diodes are presents on the single ended logic I/O ) between the 3.3V and 5V domains ? Can we directly connect the  Ro pin through a resistor divided to the MCU ? Can we directly send the MCU 3.3V digital pin to the DI pin ? Same questions applies for controls of the chipset.
  • Could you provide us with the single event effects documentation regarding the testing of the chipset ?

Thank you very much and have a great day. 

Pierre 

  • 0
    TI__Guru* 81231 points
    Pierre Robitaille said:
    Could you provide design guidelines for use case where supply is 5V , but logic control is 3.3V for MCU ?

    Page 7 of datasheet shows ViL/ViH logic thresholds (labeled "DC - Both Driver and Receiver Electrical Characteristics")

    So any MCU outputs to the DS16F95QML inputs should be fine. 

    Pierre Robitaille said:
    Will there be contention ( if clamping diodes are presents on the single ended logic I/O ) between the 3.3V and 5V domains ?

    You shouldn't see any clamping diodes conduct if the input voltages to our device don't exceed the recommended operating conditions.

    Pierre Robitaille said:
    Can we directly connect the  Ro pin through a resistor divided to the MCU ?

    Yes, this is fine.

    Pierre Robitaille said:
    Can we directly send the MCU 3.3V digital pin to the DI pin ?

    Yes, our device uses TTL levels so if the MCU can drive below 0.8V and above 2V our device can detect the high and low levels.

    Pierre Robitaille said:
    Could you provide us with the single event effects documentation regarding the testing of the chipset ?

    All documentation we have available is listed here: https://www.ti.com/product/DS16F95QML-SP#tech-docs

    -Bobby