High-Current, 10Ω, SPST, CMOS Analog Switches

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Maxim's MAX4655–MAX4658 are medium-voltage CMOS analog switches with low on-resistance of 10Ω max, specifically designed to handle large switch currents. With a switch capability of up to 400mA peak current and 300mA continuous current (MAX4655/MAX4656), and up to 300mA peak current and 150mA continuous current (MAX4657/MAX4658), these parts can switch loads as low as 25Ω. They can replace reed relays with a million times the speed and virtually unlimited number of lifetime cycles. Normal power consumption is only 3mW, whether the switch is on or off. These parts are TTL/CMOS compatible and will switch any voltage within its power-supply range.

These are SPST (single-pole/single-throw) switches. The MAX4655/MAX4657 are normally closed (NC), while the MAX4656/MAX4658 are normally open (NO). The difference between the MAX4655/MAX4656 and the MAX4657/MAX4658 is in the power dissipation of their packages. Refer to the Absolute Maximum Ratings and the Electrical Characteristics in the full data sheet.

The MAX4655–MAX4658 power-supply range is from ±4.5V to ±20V for dual-supply operation and +9V to +40V for single-supply operation. These switches can operate from any combination of supplies, within a 40V V+ to V- range. They conduct equally well in either direction and can handle rail-to-rail analog signals. The offleakage current is only 1nA max at TA = +25°C. They are available in 8-pin µMAX®, TDFN, and SO packages, with exposed paddle options for high-power applications.
MAX4655, MAX4656, MAX4657, MAX4658: Block Diagram MAX4655, MAX4656, MAX4657, MAX4658: Block Diagram Enlarge+

Key Features

  • High Continuous Current Handling
    • 300mA (MAX4655/MAX4656)
    • 150mA (MAX4657/MAX4658)
  • High Peak Current Handling
    • 400mA (MAX4655/MAX4656)
    • 300mA (MAX4657/MAX4658)
  • 10Ω (max) On-Resistance (±15V supplies)
  • VL Not Required
  • 1Ω (max) RON Flatness over Specified Signal Range
  • Rail-to-Rail Signal Handling
  • +12V Single Supply or ±15V Dual Supply Operation
  • Pin Compatible with DG417, DG418


  • Audio Signal Routing
  • Audio Systems
  • Communication Systems
  • PBX/PABX Systems
  • PC Multimedia Boards
  • Redundant/Backup Systems
  • Relay Replacement
  • Test Equipment
  • XDSL Modems
Part NumberFunctionsConfig.ChannelsNormal PositionVSUPPLY (Single)
VSUPPLY (Single)
minmaxminmaxmaxmaxmaxmaxSee Notes
MAX4655 SwitchSPST1Closed9404.520102102200100236725
SOIC (N)/8
$2.08 @1k
MAX4656 Open
SOIC (N)/8
$2.09 @1k
MAX4657 Closed
SOIC (N)/8
$2.08 @1k
MAX4658 Open
SOIC (N)/8
$2.08 @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.

Quality and Environmental Data

Request Reliability Report for: MAX4656 
Lead-Free Package Tin (Sn) Whisker Reports

CAD Symbols and Footprints

  • MAX4656ESA+
  • MAX4656ESA+T
  • MAX4656ETA+
  • MAX4656ETA+T
  • MAX4656EUA+
  • MAX4656EUA+T
  • 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.

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