MAX4066, MAX4066A

Low-Cost, Low-Voltage, Quad, SPST, CMOS Analog Switch

Please check latest availability status for a specific part variant.


The MAX4066/MAX4066A quad, SPST, CMOS analog switches are designed to provide superior performance over the industry-standard devices. These new switches feature guaranteed operation from +2.0V to +16V and are fully specified at 3V, 5V, and 12V. Both parts offer 45Ω on-resistance and 2Ω channel-to-channel matching at 12V, plus 4Ω flatness over the specified signal range.

Each device is controlled by TTL/CMOS input levels and can be used as a bilateral switch or multiplexer/demultiplexer.

Low off leakage current (100pA for the MAX4066A) and low power consumption (0.5µW) make the MAX4066/ MAX4066A ideal for battery-operated equipment. These parts are also suitable for low-distortion audio applications. Both devices are available in 14-pin DIP and SO packages, as well as a 16-pin QSOP. ESD protection is greater than 2000V per Method 3015.7.
MAX4066, MAX4066A: Pin Configuration MAX4066, MAX4066A: Pin Configuration Enlarge+

Key Features

  • Pin Compatible with 74HC4066
  • Guaranteed On-Resistance:
    • 170Ω max (3V supply)
    • 45Ω max (12V supply)
  • Guaranteed Match Between Channels:
    • 4Ω max (MAX4066)
    • 2Ω max (MAX4066A)
  • Guaranteed Low Leakage Currents:
    • 1nA at +25°C (MAX4066)
    • 100pA at +25°C (MAX4066A)
  • Single-Supply Operation from +2.0V to +16V
  • V+ to GND Signal Handling
  • TTL/CMOS-Logic Compatible
  • Low Power Consumption: 0.5µW
  • Low Crosstalk: -86dB
  • Low Off Isolation: -58dB
  • Low Distortion: 0.03%
  • Wide Bandwidth: > 100MHz


  • Audio/Video Signal Routing
  • Battery-Powered Applications
  • Communication Systems
  • Low-Voltage Data Acquisition
  • Sample-and-Hold Circuits
Part NumberFunctionsConfig.ChannelsNormal PositionVSUPPLY (Single)
VSUPPLY (Single)
minmaxmaxmaxmaxmaxSee Notes
MAX4066 SwitchSPST4Open2164510011257510229
SOIC (N)/14
$1.85 @1k
MAX4066A 0.1
$2.35 @1k
See All Switches and Multiplexers (Mid and High Voltage) (299)
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.

Technical Documents

App Note 5299 Selecting the Right CMOS Analog Switch
App Note 2594
App Note 1031 Low-Power 3V ADC is 0.05% Linear

Quality and Environmental Data

Product Reliability Reports: MAX4066.pdf  MAX4066A.pdf 
Lead-Free Package Tin (Sn) Whisker Reports
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

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.

Quality Management System >
Environmental Management System >


Related Resources

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  • Flexibility
  • Embedded Digital Resources for Beamforming

Type ID PDF Title
App Note 5299 Selecting the Right CMOS Analog Switch
App Note 2594
App Note 1031 Low-Power 3V ADC is 0.05% Linear