Because of the Thanksgiving holiday in the U.S., TI E2E™ design support forum responses may be delayed from November 25 through December 2. Thank you for your patience.

  • State TI Thinks Resolved
  • Locked Locked
  • Replies 3 replies
  • Answers 2 answers
  • Subscribers 16 subscribers
  • Views 1919 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

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.

Original question:

I2S multiplexer / switch

SN74CB3Q3257: I2S multiplexer / switch

William Sung36
Intellectual 395 points
Part Number: SN74CB3Q3257
Other Parts Discussed in Thread: TLV320AIC3204, , TS3A5018, TS3A44159

Hi,

I'm trying to share a I2S interface between a TLV320AIC3204 codec and another device, i saw on another posting that a SN74CB3Q3257 switch can be used for switching I2S signals, can this part be used for switching I2S signals between the codec and another device? My voltage levels are 3.3V.

Thanks

  • 0
    TI__Mastermind 45410 points

    William,

    I2S signals are low speed signals and typically you only need a device with >15MHz bandwidth so almost any signal switch will work.  

    I2S signals also are 4 data lanes so you would need a 4-channel switch.

    Since you are interfacing two devices to one port you will need a 2:1 configuration.

    You also mention your voltage levels to be 3.3 V.  

    Using these 4 statements above about I2S you can filter the TI portfolio on the TI.com switch search tool.  

    All of these switches could work for you but I like the TS3A5018 because it is the smallest package and has flexibility in voltage supply range incase you move to 1.8V node in the future.

    Thank you,

    Adam

  • 0 in reply to Adam Torma
    Intellectual 395 points

    Hi, thank you for the insight, would this part also worl:

    TS3A44159

    This part has a lot lower RDS on and has a BW of 35MHz

    Thanks

  • 0 in reply to William Sung36
    TI__Mastermind 45410 points
    Willam,

    Based on the explanation above what is giving you the doubt that the TS3A44159 will not work for I2S switching? What would give you confidence to more forward so I know how to serve you better on the forum better?

    Thank you,
    Adam