Beyond-the-Rails Octal SPST Switches

Switch ±5.5V Common-Mode Signal from a Single Supply Rail as Low as 1.6V

Please check latest availability status for a specific part variant.


The MAX14662 is a serially controlled 8 x SPST switch for general purpose signal switching applications. The number of switches makes the device useful in a wide variety of applications while serial control maximizes flexibility with minimal pins. This part features Beyond-the-Rails capability so that ±5.5V signals can be passed with any single supply between +1.6V and +5.5V.

The serial control is selectable between I2C and SPI. Both modes provide individual control of each independent switch so that any combination of switches can be applied. I2C mode provides two address select pins allowing for addressing up to four devices on a single bus. The SPI mode includes a DOUT pin that can be used to chain multiple devices together with a single select signal.

The MAX14662 is available in a 28-pin (4mm x 4mm) TQFN package and is specified over the -40°C to +85°C extended temperature range. The A_ and B_ pins provide ±15kV Human Body Model (HBM) ESD protection.
MAX14662: Typical Application Circuit MAX14662: Typical Application Circuit Enlarge+

Key Features

  • 8 x SPST Switch
  • Serial Control
    • I2C with Two Address-Select Pins
    • SPI with DOUT for Daisy Chain
    • Independent Control of Each Switch
  • Beyond-the-Rails
    • ±5.5V Signal Range Independent of Supply Voltage
  • Low Distortion Switching
    • Total Harmonic Distortion + Noise 0.001% (typ)
    • RON Flatness 0.5mΩ (typ) Across Complete Signal Range
  • Wide Supply Range
    • +1.6V to +5.5V Single Supply
  • 0.425Ω RON (typ)
  • Compact Package
    • 4mm x 4mm, 28-Pin TQFN
  • ±15kV HBM ESD Protection on all A_ and B_ Pins


  • Audio Switching/Multiplexing
  • Port Protection
  • Power Management

See parametric specs for Switches and Multiplexers ≤ 5V (165)

Part NumberProtocolConfig.ChannelsNormal PositionVSUPPLY (Single)
VSUPPLY (Single)
Dynamic Range (max)
minmaxminmaxmaxmaxtypmaxmaxSee Notes
MAX14662 I2CSPST8Open1.65.5-5.55.51110.0054005060000
$1.72 @1k

Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

Tools & Models

  • MAX14662 IBIS Model
  • Request Reliability Report for: MAX14662 
    Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

    Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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