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TMUX4053: Quad 1:1 (SPST) dual-supply switch

Pete
Prodigy 135 points
Part Number: TMUX4053
Other Parts Discussed in Thread: TMUX6211, CD74HCT4316, CD74HC4316, , TMUX4051

Tool/software:

Hi switches team,

I’m looking for a quad 1:1 (SPST) switch able to handle a ±12V dual-supply and bipolar audio signals (also up to about ±12V), along with 3.3V logic level interfacing.

The TMUX6211 can do this, but is simply too costly ($2.1 @1000pcs) for this audio consumer product needing 18 devices per unit.
I assume the very low Ron of 2Ω is part of increasing the price, but this is normally not necessary in audio and many other circuits, where a Ron of 50Ω or higher often would be fine.

The CD74HCT4316 is cheap and works with 3.3V logic levels, but has a max dual-supply of about ±5V, which is not enough for most audio applications.
Also it seems to be in the process of being obsoleted, which is a shame since it’s the only dual-supply quad SPST switch able to interface with 3.3V logic levels. The HC version (CD74HC4316) is apparently not being obsoleted, but can’t use 3.3V logic levels when supplied from ±5V.

I guess I’m looking for a device with similar specs and price range as the TMUX405x series, like the TMUX4053 which is only $0.13 @1000pcs, and can use ±12V dual-supplies and 3.3V/1.8V logic levels.

Do you know if TI may have plans for such a device in the future?
I think this would be very popular in audio and other applications using bipolar signals. It would also close the gap for a quad 1:1 switch, since the TMUX405x series already provide the other 2:1, 4:1 and 8:1 configurations.

With high hopes;)
-Peter

  • 0
    TI__Genius 10552 points

    Hi Peter,

    Thanks for reaching out here. You're correct here that this appears to be a gap for us. I'll add this to our creative backlog and will discuss pricing with the marketing team for this in case there is any wiggle room. Do you have more information on the business case for this device? 

    Regards,

    Alex

  • 0 in reply to Alex Vish
    Prodigy 135 points

    Hi Alex

    Sorry about the delay. That sounds great, I really think there will be demand for such a chip.

    Regarding our particular project, we are developing an analog synthesizer with 12 voices (voltage-controlled oscillators, filters and amplifiers), each needing two bipolar quad SPST switches capable of ±12V dual-supplies, i.e. 24 devices per unit.

    We will also be using a lot of TMUX4053 (SPDT) and TMUX4051 (8:1) switches/demultiplexers, but are greatly missing a quad SPST version of the TMUX405x family.

    I’m sure a bipolar quad SPST switch will be useful in many other applications besides audio, like measurement and AC motor circuits, and as replacement for the CD74HCT4316 which has a ‘not recommended for new designs’ status.

    It could have the same pin arrangement as the CD74HCT4316.. and perhaps even be baptized TMUX4316:-)

    Best regards,
    Peter

  • 0 in reply to Pete
    TI__Genius 10552 points

    Hi Peter,

    Thanks so much for the additional info. It's good to know the application for this use case for when we explore potential future projects. I'll keep you posted if there is anything promising in the pipeline. 

    Regards,

    Alex

  • 0 in reply to Alex Vish
    Prodigy 135 points

    Hi Alex,

    I just want to add I’m aware our analog synthesizer is quite a niche application, and even though using a large number of 24 quad switch devices per unit, the synthesizer will probably only sell in the hundreds and not many thousand of units.

    But I really hope this won’t discard you from going forward with this, as the switch will be useful in many applications.
    The TMUX4053 datasheet mentions: Factory automation and control, Appliances, Medical, Battery test equipment, Power delivery, Building automation, Grid infrastructure.
    Generally all applications using a supply voltage higher than 5V, where the typical max 5V single-supply switches can’t be used.

    I believe the reason a quad SPST switch isn’t available is for historic reasons, since the CD4051/74HCx4051, 4052 and 4053 were grouped and marketed together as multiplexers. The TMUX4053 is also designated as a 3-channel multiplexer, though it’s more like ‘3 pieces of SPDT switches’. The equivalent 74HCx4316 quad SPST (a bipolar version of the 74HCx4016 and 74HCx4066) is perhaps lesser known as it was separated from it’s 405x siblings and not mentioned in their datasheet. Sad story;-)

    Regarding demand/sales I guess that’s easy to estimate from looking at similar figures for the TMUX405x series.

    Best,
    Peter

  • +1 in reply to Pete
    TI__Genius 10552 points

    Hi Peter,

    Understood! We'll see what we can do as general purpose HV switches is a key backlog item for us. I must admit the enthusiasm is much appreciated and ought to help drive effort on this front! 

    Regards,

    Alex