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[FAQ] Schematic Review Suggestions - TUSB211 as an example

Prodigy 50 points

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How can I verify if my schematic is correct?

  • Reviewing your schematic can seem like a daunting task, sometimes you may not know where to start because parts for different serial standards have various rules that you should follow. While it is always possible to request a schematic review on the E2E forum, there are other things you may do to ensure that your design is up to par. Remember that the methods here apply to most devices, in this FAQ TUSB211 will be used an example.

    Note: E2E is a public forum, please do not post any proprietary information that contains important company info. Instead feel free to start a thread and ask about how you can send us your schematic for review through the proper channels.

    • Check if there is a schematic checklist available for your specific part on TI.com. Some parts may have a schematic checklist available on our website. This is the easiest way to verify if your schematic is correct because the checklist contains a pin by pin explanation of what your design should contain or what might be recommended for different scenarios. In the figure below we can see a schematic checklist for the TUSB211, which can be found at the following link: https://www.ti.com/lit/pdf/slla389.

      

    What can we do in the scenario that there is not a schematic checklist available for the part you are working with in specific?

    • Checking an EVM users guide is a great way to mitigate the situation where there is not a schematic checklist for the specific part you are looking for. In the user’s guide you will find an EVM schematic figure that can be used to identify what is required to be part of the design. While it may not be as simple as reading a checklist and cross-referencing it with your own design, the same principles that are applied to a schematic checklist are the ones used in an EVM design. In the figure below we can see the EVM schematic for the TUSB211, which is the same device we posted the schematic checklist for above. Here we can see that all the elements that were mentioned in the checklist above have been applied to this schematic. The link to the TUSB211 users guide can be found at: https://www.ti.com/lit/pdf/sllu247.

      

                   What if you have questions about the schematic?

    • Searching on E2E is a quick way to find answers to questions you may have. Schematics can be complicated and vary by specific application so there are tons of questions about them. So remember if for some reason you are trying to understand why certain resistor or capacitor values were used for specific pins it is always a good idea to refer to the device data sheet or post a question on the forum. In the figure below we can see the user is asking if his schematic is okay or if there are any suggestions for changes. There are vast amounts of E2E threads on schematics so if you have a question then it is most likely to have already been answered so it’s always good to check.

      

    Lastly and most importantly do not forget that you are always free to request that your schematic be reviewed, so if there are ever any doubts or questions feel free to post it and have a professional verify it. Please remember not to post any proprietary information on E2E since it is a public forum, instead just ask how you can send us your schematic through the proper and secure channels.

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