Quad/Dual, Low-Voltage, Bidirectional RF Video Switches

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The MAX4545/MAX4546/MAX4547 are low-voltage T-switches designed for switching RF and video signals from DC to 300MHz in 50Ω and 75Ω systems. The MAX4545 contains four normally open single-pole/single-throw (SPST) switches. The MAX4546 contains two dual SPST switches (one normally open, one normally closed.) The MAX4547 contains two single-pole/double-throw (SPDT) switches.

Each switch is constructed in a "T"configuration, ensuring excellent high-frequency off isolation and crosstalk of -80dB at 10MHz. They can handle rail-to-rail analog signals in either direction. On-resistance (20Ω max) is matched between switches to 1Ω max and is flat (0.5Ω max) over the specified signal range, using ±5V supplies. The off leakage current is less than 5nA at +25°C and 50nA at +85°C.

These CMOS switches can operate with dual power supplies ranging from ±2.7V to ±6V or a single supply between +2.7V and +12V. All digital inputs have 0.8V/2.4V logic thresholds, ensuring both TTL- and CMOS-logic compatibility when using ±5V or a single +5V supply.
MAX4545, MAX4546, MAX4547: Pin Configuration MAX4545, MAX4546, MAX4547: Pin Configuration Enlarge+

Key Features

  • Low 50Ω Insertion Loss: -1dB at 100MHz
  • High 50Ω Off Isolation: -80dB at 10MHz
  • Low 50Ω Crosstalk: -80dB at 10MHz
  • DC to 300MHz -3dB Signal Bandwidth
  • 20Ω Signal Paths with ±5V Supplies
  • 1Ω Signal-Path Matching with ±5V Supplies
  • 0.5Ω Signal-Path Flatness with ±5V Supplies
  • ±2.7V to ±6V Dual Supplies
  • +2.7V to +12V Single Supply
  • Low Power Consumption: < 1µW
  • Rail-to-Rail Bidirectional Signal Handling
  • Pin Compatible with Industry-Standard DG540, DG542, DG643
  • > 2kV ESD Protection per Method 3015.7
  • TTL/CMOS-Compatible Inputs with Single +5V or ±5V


  • Automated Test Equipment (ATE)
  • High-Speed Data Acquisition
  • Networking
  • RF Switching
  • Test Equipment
  • Video Signal Routing
Part NumberFunctionsConfig.RON
Off Iso.
maxmaxmax@ Freq.@ Freq.DualSee Notes
MAX4545 Switch4 x SPST NO20Parallel5150-80@10MHz-88@10MHz2.7 to 12.02.7 to 6
SOIC (W)/20
$2.93 @1k
MAX4546 Switch2 x SPST NO/NC-80@10MHz-80@10MHz
SOIC (N)/16
2 x 2-to-1
2 x SPDT
SOIC (N)/16
See All Audio/Video Routing (Unbuffered) (27)
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

Quality and Environmental Data

Product Reliability Reports: MAX4545.pdf 
Lead-Free Package Tin (Sn) Whisker Reports

CAD Symbols and Footprints

  • MAX4545CAP
  • MAX4545CAP+
  • MAX4545CAP+T
  • MAX4545CAP-T
  • MAX4545CPP
  • MAX4545CPP+
  • MAX4545CWP
  • MAX4545CWP+
  • MAX4545CWP+T
  • MAX4545CWP-T
  • MAX4545EAP
  • MAX4545EAP+
  • MAX4545EAP+T
  • MAX4545EAP-T
  • MAX4545EAP/GG8
  • MAX4545EAP/GG8-T
  • MAX4545EPP
  • MAX4545EPP+
  • MAX4545EQP-T
  • MAX4545EWP
  • MAX4545EWP+
  • MAX4545EWP+T
  • MAX4545EWP-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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    Environmental Management System >


    Related Resources

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