High-Current, 25Ω, SPDT, CMOS Analog Switches

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The MAX4659/MAX4660 are medium voltage CMOS analog switches with a low on-resistance of 25Ω max specifically designed to handle large switch currents. With a switch capability of up to 200mA peak current and 150mA continuous current (MAX4660), and up to 150mA peak current and 75mA continuous current (MAX4659), these parts can switch loads as low as 50Ω. They can replace reed relays with a million times the speed and a 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 their power-supply range.

The devices are single-pole/double-throw (SPDT) switches. The MAX4659/MAX4660 contain one normally closed (NC) switch and one normally open (NO) switch. The MAX4659/MAX4660s' 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 off-leakage current is only 1nA max at TA = +25°C. The MAX4659 is available in 8-pin µMAX® and SO packages. The MAX4660 is available in thermally enhanced exposed paddle µMAX and SO packages.
MAX4659, MAX4660: Functional Diagram MAX4659, MAX4660: Functional Diagram Enlarge+

Key Features

  • High Continuous Current Handling
    • 150mA Continuous Current (MAX4660)
    • 75mA Continuous Current (MAX4659)
  • High Peak Current Handling
    • 200mA Peak Current (MAX4660)
    • 150mA Peak Current (MAX4659)
  • 25Ω max On-Resistance (±15V Supplies)
  • VL Supply Not Required
  • 1.5Ω max RON Flatness (±15V Supplies)
  • Rail-to-Rail Signal Handling
  • +12V Single Supply or ±15V Dual-Supply Operation
  • Pin Compatible with DG419, MAX319


  • Audio Systems
  • Audio-Signal Routing
  • Communication Systems
  • PBX/PABX Systems
  • PC Multimedia Boards
  • Redundant/Backup Systems
  • Relay Replacement
  • Test Equipment
  • XDSL Modems

See parametric specs for Switches and Multiplexers (Mid and High Voltage) (299)

Part NumberFunctionsConfig.ChannelsVSUPPLY (Single)
VSUPPLY (Single)
minmaxminmaxmaxmaxmaxmaxSee Notes
MAX4659 SwitchSPDT19404.5202522521501501.5256
SOIC (N)/8
$2.50 @1k
SOIC (N)/8
$2.21 @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.
Product Reliability Reports: MAX4659.pdf 
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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