Serial Multiplexer Breakout - TS3A5017

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

Serial Multiplexer Breakout - TS3A5017 Product Help and Resources

Core Skill: Soldering

This skill defines how difficult the soldering is on a particular product. It might be a couple simple solder joints, or require special reflow tools.

1 Soldering

Skill Level: Noob - Some basic soldering is required, but it is limited to a just a few pins, basic through-hole soldering, and couple (if any) polarized components. A basic soldering iron is all you should need.
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Core Skill: Programming

If a board needs code or communicates somehow, you're going to need to know how to program or interface with it. The programming skill is all about communication and code.

2 Programming

Skill Level: Rookie - You will need a better fundamental understand of what code is, and how it works. You will be using beginner-level software and development tools like Arduino. You will be dealing directly with code, but numerous examples and libraries are available. Sensors or shields will communicate with serial or TTL.
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Core Skill: Electrical Prototyping

If it requires power, you need to know how much, what all the pins do, and how to hook it up. You may need to reference datasheets, schematics, and know the ins and outs of electronics.

2 Electrical Prototyping

Skill Level: Rookie - You may be required to know a bit more about the component, such as orientation, or how to hook it up, in addition to power requirements. You will need to understand polarized components.
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Looking for answers to technical questions?

We welcome your comments and suggestions below. However, if you are looking for solutions to technical questions please see our Technical Assistance page.

  • eewestcoaster / about 11 years ago / 2

    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.

  • JRiggles / about 10 years ago / 1

    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?

  • scottj / about 11 years ago / 1

    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?

  • YellowFlower / about 12 years ago / 1

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

  • AdrianFreed / about 13 years ago / 1

    "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.

  • AdrianFreed / about 13 years ago / 1

    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.

  • AdrianFreed / about 13 years ago / 1

    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.

  • SlyVixsky / about 13 years ago / 1

    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...

  • Helicopter / about 14 years ago / 1

    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.

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