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.
Could you please tell us what to do with the unused Driver/Reciver pins ?
Driver : 2D, 2Y, 2Z Receiver : 2R, 2A, 2B
The answer for receiver was in the following URL.http://e2e.ti.com/support/interface/industrial_interface/f/142/p/102795/361353.aspx#361353
I am understanding that receiver differential input, 2A : Pull up, 2B : Pull down (or the opposite).Is pull up or pull down resistor needed to these pins ?If you have a recommendation, please tell us the recommended resistor value.
For the driver input 2D, I think it should be pulled up or down. Outputs could be left open.
I agree with the answer you found for what to do with the receiver pins. For the driver pins I would recommend tying the input 2D either high or low. It is never recommended to float a CMOS input as it can float and cause the device to draw large amounts of current.
I checked the data sheet and it does not look like it will make much of a difference (from a power standpoint) if you tie the 2D pin high or low, just make sure that one or the other is chosen. The two output pins of the driver (2Y and 2Z) can be left floating.
There is an app note below that decribes what can happen when floating input pins below for reference.
Please let me know if you have any other questions.
We are glad that we were able to resolve this issue, and will now proceed to close this thread.
If you have further questions related to this thread, you may click "Ask a related question" below. The newly created question will be automatically linked to this question.
In reply to John Griffith:
Thank you for your reply.
How about the resistor for the pull up or pull down ? How about 10k for each pull up or down ?
*For the receiver input, it seems that the pins have fail-safe circuit(weak pull up/down). But if the device is used in noisy environment, I think maybe a 10k would be better.
What do you think ?
In reply to Kawai:
A 10kΩ resistor will work just fine for both the receiver differential inputs (one up one down) and the driver input.
All content and materials on this site are provided "as is". TI and its respective suppliers and providers of content make no representations about the suitability of these materials for any purpose and disclaim all warranties and conditions with regard to these materials, including but not limited to all implied warranties and conditions of merchantability, fitness for a particular purpose, title and non-infringement of any third party intellectual property right. No license, either express or implied, by estoppel or otherwise, is granted by TI. Use of the information on this site may require a license from a third party, or a license from TI.
TI is a global semiconductor design and manufacturing company. Innovate with 100,000+ analog ICs andembedded processors, along with software, tools and the industry’s largest sales/support staff.