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AM26C31: AM26C31 and AM26C32 Send and receive signals questions

Mickey Zhang
Genius 12080 points
Part Number: AM26C31
Other Parts Discussed in Thread: AM26C32

Hi Team,

The customer is using AM26C31 and AM26C32 for the R22 bus communication. The customer has achieve this function that only one device sends the data,

multiple devices receive the data on the 422 bus. Now the customer would like to achieve another function that multiple devices send the data, only one
device receive the data. And at a moment there is only one device sends the data.

Q1: Can this function be achieved ? If it can be in the achieved, is it be achieved on the R22 bus communication or on the R485 bus communication?

Q2: If we have the a suitable IC to achieved this function, can you recommend a suitable IC? How to achieved this function through the
suitable IC?

Best Wishes,
Mickey Zhang
Asia Customer Support Center
Texas Instruments

 

  • 0
    TI__Genius 12080 points
    Hi Team,

    Is there anyone see my questions? The customer is waiting for my reply.
  • 0 in reply to Mickey Zhang
    TI__Intellectual 2885 points
    Hello Mickey,

    I will look into a solution for you. The parts you listed will not work for your application. You need several inputs and one single output. and those parts work for several inputs and several outputs.
  • 0 in reply to Matt Mendez
    TI__Intellectual 2885 points

    Hello Mickey,

    After some research and talking with some of the Apps engineers on my team, I have concluded that your proposed network cannot be made with a RS-422 network. The problem with having several inputs, is that there needs to be a clock or some token system that regulates which device has control of the bus at any given time. A RS-422 network has one master and several slaves (that just receive). By using a RS-485 network each node can send/receive (master/slave). I'm not sure what application or parameters you need for this network, but I'd look at the SN65HVD17xx line of RS-485 transceivers.

    Regards,

    Matt

  • 0 in reply to Matt Mendez
    TI__Genius 12080 points
    Hi Matt,

    Thank you for your reply.

    If we using a RS-485 network each node can send/receive (master/slave), how to solve the issue? Can you recommend a suitable 485 send/receive IC?
  • 0 in reply to Mickey Zhang
    TI__Intellectual 2885 points

    By using this type of network you could enable it so all your "inputs" can be masters (send data) and your "output" can be setup to only receive information. I'm not sure what parameters you need for this network. I've attached a link to our RS-485 portfolio, where you can filter the specifications you want to find a part that works for you.

    http://www.ti.com/lsds/ti/interface/rs-485-products.page