Renesas offers a family of 3.3V and 5V analog multiplexer/demultiplexer ICs that provide high-speed switching without adding propagation delay or generating additional ground bounce noise. These are ideal for bidirectional interfaces between mixed-supply buses, and in applications that require isolation and protection.

Available in a 4-channel-2:1, 2-channel-4:1, and 6-channel-4:1, Renesas' multiplexers are optimized for high-performance video signal switching, audio signal switching, and telecom routing applications. High performance and low power dissipation make this device ideal for battery-operated and remote-instrumentation applications.

About Multiplexers and Demultiplexers

An analog multiplexer (also known as a MUX or data selector) is a device used to select one of many input signals and connect that selected input to a single output/transmission line. A select line is used to control which input is connected to the output of the multiplexer.

The multiplexer offers the benefit of reducing the required number of transmission lines by switching various signals onto a single line. In other words, a single line can be shared by multiple signals at different times. Likewise, a demultiplexer does the reverse. That is, a signal coming into a single node can be switched to multiple outputs at different times. Oftentimes, a demultiplexer will be placed on the receiving side of the transmission line to complement the multiplexer, splitting the single data stream into the original multiple signal paths.

Important parameters of multiplexers and demultiplexers are:

  • on-resistance: the path resistance when switched on. Renesas' multiplexers/demultiplexers provide an on-resistance of 5ohms.
  • transition time: the amount of time it takes for the multiplexer/demultiplexer to transition from one input to the next. Renesas’ products transition in 6ns.
  • bandwidth (-3dB point): the range of acceptable switching frequencies. Renesas’ multiplexers/demultiplexers provide up to 830MHz bandwidth, are ideal for high-performance video signal switching, audio signal switching, and telecom routing applications.
  • crosstalk: the amount of noise transmitted from one switch/signal to another when in operation. Renesas’ multiplexers/demultiplexers offer excellent crosstalk performance up to -115dB at 50kHz, -100dB at 5MHz, and -66dB at 30MHz.
  • off-isolation: the isolation of the switches within the device when the switches are off. Renesas’ multiplexers/demultiplexers offer superb off-isolation up to -90dB at 50kHz, -60dB at 5MHz, and -50dB at 30MHz.

Memory & Logic

Product Selection Table

    Processing table
    Part Number
    Function
    Pkg. Code
    Temp. Range
    Bus Width (bits)
    Core Voltage (V)
    On Resistance (Ω)
    Speed Grade
    105°C Max. Case Temp.
    QS4A205
    4-Channel 2:1 Analog Mux/Demux    		 Analog Mux/Demux PCG16 -40 to 85°C 8 5 5 Standard
    Parametric Table tips

    Tips for Using This Parametric Table:

    • Hide Filters button in header: Collapse or expands filters
    • Column sort buttons in header: Sort Column alphabetically / numerically descending or ascending
    • Reset button in header: Reset all filters to the page default
    • Full Screen button in header: Expand the table to full screen view (user must close out of full screen before they can interact with rest of page)
    • Export button in header: Export the filtered results of the table to an Excel document
    • Filter parts search bar in header: Type to filter table results by part number
    • Hide column button in column headers: Select to hide columns in table
    • AND / OR toggle switches in header: Toggles the logic of this particular filter to be “AND” or “OR” logic for filtering results
    • Multiselect checkboxes at beginning of each row in table: Select these checkboxes to compare products against each other
    • Document icon next to product name in row: View the featured document for this product
    • Chip icon next to the right of the document icon in row: View the block diagram for this product
    • Cart icon to the right of the chip icon: Indicates that samples are available for this product

    Documentation

    Title Type Date
    IDT Digital Logic Products Package and Ordering Information
    PDF109 KB
    Guide
    Logic Products Overview
    PDF2.19 MB
    Overview