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MAX4508, MAX4509
Fault-Protected, High-Voltage Single 8-to-1/Dual 4-to-1 Multiplexers with Output Clamps


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Status
Active: In Production.

Description
FULL DATA SHEET (PDF, 340kB)
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The MAX4508/MAX4509 are 8-to-1 and dual 4-to-1 fault-protected multiplexers that are pin compatible with the industry-standard DG508/DG509. The MAX4508/MAX4509 operate with dual supplies of ±4.5V to ±20V or a single supply of +9V to +36V. These multiplexers feature fault-protected inputs, rail-to-rail signal handling capability, and overvoltage clamping at 150mV beyond the rails.

Both parts offer ±40V overvoltage protection with supplies off and ±25V protection with supplies on. On-resistance is 400Ω max and is matched between channels to 15Ω max. All digital inputs have TTL logic thresholds, ensuring both TTL and CMOS logic compatibility when using a single +12V supply or dual ±15V supplies.

Key Features   Applications/Uses
  • ±40V Fault Protection with Power Off
    ±25V Fault Protection with ±15V Supplies
  • Rail-to-Rail Signal Handling
  • No Power-Supply Sequencing Required
  • All Channels Off with Power Off
  • Output Clamped to Appropriate Supply Voltage During Fault Condition
  • 1kΩ Output Clamp Resistance During Overvoltage
  • 400Ω max On-Resistance
  • 20ns Fault-Response Time
  • ±4.5V to ±20V Dual Supplies
    +9V to +36V Single Supply
  • TTL/CMOS-Compatible Logic Inputs

 
  • Avionics
  • Data Acquisition Systems
  • Industrial and Process Control
  • Redundant/Backup Systems
  • Signal Routing

    Key Specifications:  Switches and Multiplexers (Mid Voltage)
    Part Number Functions Config. Channels VSUPPLY (Single)
    (V)
    VSUPPLY (Single)
    (V)
    VSUPPLY (Dual)
    (±V)
    VSUPPLY (Dual)
    (±V)
    RON
    (Ω)
    IL(OFF)
    (nA)
    tON
    (ns)
    tOFF
    (ns)
    QINJECTION
    (pC)
    CON
    (pF)
    COFF
    (pF)
    Price
    min max min max max max min max max max See Notes
    MAX4508  Mux 8:1 1 9 36 4.5 20 400 2 275 200 10 28 10 $2.87 @1k
    MAX4509  4:1 2 1 22 $2.87 @1k
    See All Switches and Multiplexers (Mid Voltage) (297)

    Diagram
    MAX4508, MAX4509: Functional Diagram
    Functional Diagram

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    Document Ref.: 19-1414; Rev 5; 2008-01-02
    This page last modified: 2009-11-05


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