Retired Product

This product has been retired from our catalog and is no longer for sale. This page is made available for those looking for datasheets and the simply curious.

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Description: Replacement: None. We are no longer carrying this breakout board in our catalog. This page is for reference only.

This is a breakout board for the TS3A5017 Serial Multiplexer. The TS3A5017 is a dual single-pole quadruple-throw (4:1) analog switch that is designed to operate from 2.3 V to 3.6 V. This device can handle both digital and analog signals, and signals up to V+ can be transmitted in either direction.


  • Isolation in the Powered-Down Mode, V+ = 0
  • Low ON-State Resistance (10 Ohm)
  • Low Charge Injection
  • Excellent ON-State Resistance Matching
  • Low Total Harmonic Distortion (THD)
  • 2.3-V to 3.6-V Single-Supply Operation
  • Latch-Up Performance Exceeds 100 mA


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Customer Comments

  • It would be nice to include the two EN signals. As it is now, I can’t really use it as two distinct switches because I can’t individually control the two groups.
    Rather than two distinct single-pole, quadruple-throw switches, it’s one big double-pole, quadruple-throw switch. I suppose there could be a use for that, but it’s not why I bought these. The board design limits the chip, not the other way around.

  • The datasheet mentions these are useful for audio signal switching, but the ~3v supply maximum definitely limits your useable signal level. Is there any way around that without sacrificing audio quality? Or is there perhaps a similar IC with a higher V+ rating?

  • How would this work to read 3 Thermocouple probes (K type) with
    Thermocouple Amplifier Digital MAX6675 (sku: COM-00307)
    Has anyone used this to multiplex thermocouple probes?

  • Can sparkfun please supply just the chip aswell, instead of the entire break out.

  • “Obviously the Sparkfun database is a leetle bit screwed up. Let it go."
    Why let it go?
    We rely heavily on Sparkfun’s careful testing and QC on their boards - otherwise we
    would be putting these generic parts on boards ourselves. A ragged
    database update (at many levels in this new product) is a sign they might not
    be on top of things.

  • On resistance is 11Ohms not 10.
    Also notice the current allowed through the switches is insufficient for high current
    USB implementations. (128mA).
    As with most of switches like this capacitance is an issue (25pF) at high speeds.

  • Yes, there is nothing serial about this multiplexer.
    The chip contains two ganged 4-way analog switches.

  • Obviously the Sparkfun database is a leetle bit screwed up. Let it go.

  • datasheet helps a lot-use 1S for TX and 2S for RX. set S1-S4 for port 1-4, D is the host.

  • Do you know if rx messages are buffered? or are the simply discarded if not being read?

  • I cant get this thing to work… Im trying to switch between USB-serial ports… its like it only wants to talk one way…

  • Maybe its me but the descriptions is as clear as mud.
    From the datasheet I think this thing is 2 separate switches. Each switch is a 4 position switch.
    These things sound cool but I don’t know what to do with it.

Customer Reviews

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