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Maxim > Products > Analog Switches and Multiplexers 
MAX4744, MAX4744H, MAX4745, MAX4745H, MAX4746H
Low-Voltage, Dual SPDT, Audio Clickless Switches with Negative Rail Capability

Negative Signal Handling and Audio Clickless/Popless Features in a Small, 10-Pin µDFN Package (2mm x 2mm)


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Description
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The MAX4744/MAX4744H/MAX4745/MAX4745H/ MAX4746H dual SPDT (single-pole/double-throw) audio switches feature negative signal capability that allows signals as low as VCC - 5.5V to pass through without distortion. These analog switches have a low on-resistance and low supply current, and operate from a single +1.8V to +5.5V supply.

The MAX4744/MAX4744H have internal shunt resistors that automatically discharge the capacitance at the normally open (NO) and normally closed (NC) terminals when they are not connected. The MAX4746H features internal shunt resistors on NC_ terminals. This reduces click-and-pop sounds that occur when switching audio signals between precharged points. A break-before-make feature further reduces popping. The MAX4744/MAX4745 control the switches with two control bits CB1 and CB2. The MAX4744H/MAX4745H/MAX4746H have one control bit to switch both switches and an enable input active-low EN to put the switches in a high-impedance mode. The MAX4744H/MAX4745H/MAX4746H also have an internal protection network against voltages applied to COM_ when VCC = 0V.

These devices are available in a space-saving 10-pin µDFN (2mm x 2mm) package and operate over the -40°C to +85°C extended temperature range.

Key Features   Applications/Uses
  • Distortion-Free Negative Signal Throughput Down to VCC - 5.5V
  • Internal Shunt Resistor Reduces Click/Pop (MAX4744/MAX4744H)
  • 0.6Ohm (typ) Low On-Resistance
  • 0.1Ohm (max) Channel-to-Channel Matching
  • 0.55Ohm (max) On-Resistance Flatness
  • +1.8V to +5.5V Single-Supply Voltage
  • 0.01% (typ) Total Harmonic Distortion
  • -75dB (typ) Crosstalk (100kHz)
  • -68dB (typ) Off-Isolation (100kHz)
  • Available in 10-Pin µDFN Package (2mm x 2mm)

 
  		• Cellular Phones
  		• MP3 Players
  		• Notebook Computers
  		• PDAs and Other Handheld Devices
  		• Power Routing
  		• Speaker Switching

    Key Specifications:   Switches and Multiplexers (Low Voltage)
    Part Number Configuration Number of Channels VSUPPLY, Single (min) (V) VSUPPLY, Single (max) (V) RON (max) (Ω) Bandwidth (MHz) tON (max) (nS) tOFF (max) (nS) QINJECTION (pC) CON (pF) COFF (pF) Features VISO, Off-Isolation (dB) VCT, Crosstalk (dB) ΔRON (max) (Ω) RFLAT(ON) (max) (Ω) Redundancy Switch RoHS Available Package Price**
    MAX4744  SPDT 2 1.8 5.5 0.95 25 560 540 550 300 90
    •1.8V Logic Compatible
    •High Current
    		 68 75 0.1 0.55 No Yes MicroDFN/10 $1.15 @ 1k
    MAX4744H  $1.15 @ 1k
    MAX4745  $1.15 @ 1k
    MAX4745H  $1.15 @ 1k
    See All Switches and Multiplexers (Low Voltage) (127)
    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 prices and delivery, please see the price and availability page or contact an authorized distributor.

    Diagram
    MAX4744, MAX4744H, MAX4745, MAX4745H, MAX4746H: Typical Operating Circuit
    Typical Operating Circuit

    Evaluation Kits
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    Design Guides
  		• MUX & SWITCH (PDF)

    Reliability Reports
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    Software/Models
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    Ordering Information
    Notes:

    1. Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
    2. Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
    3. Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions.
    4. * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.


    Devices: 1-10 of 10

    MAX4744 Free
    Sample    		 Buy
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX4744ELB+  
    		MicroDFN;10 pin;
    Dwg: 21-0164B (PDF)
    Use pkgcode/variation: L1022+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX4744ELB+T  
    		MicroDFN;10 pin;
    Dwg: 21-0164B (PDF)
    Use pkgcode/variation: L1022+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX4744H Free
    Sample    		 Buy
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX4744HELB+  
    		MicroDFN;10 pin;
    Dwg: 21-0164B (PDF)
    Use pkgcode/variation: L1022+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX4744HELB+T  
    		MicroDFN;10 pin;
    Dwg: 21-0164B (PDF)
    Use pkgcode/variation: L1022+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX4745 Free
    Sample    		 Buy
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX4745ELB+  
    		MicroDFN;10 pin;
    Dwg: 21-0164B (PDF)
    Use pkgcode/variation: L1022+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX4745ELB+T  
    		MicroDFN;10 pin;
    Dwg: 21-0164B (PDF)
    Use pkgcode/variation: L1022+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX4745H Free
    Sample    		 Buy
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX4745HELB+  
    		MicroDFN;10 pin;
    Dwg: 21-0164B (PDF)
    Use pkgcode/variation: L1022+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX4745HELB+T  
    		MicroDFN;10 pin;
    Dwg: 21-0164B (PDF)
    Use pkgcode/variation: L1022+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX4746H Free
    Sample    		 Buy
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    		Temp RoHS/Lead-Free?
    Materials Analysis
    MAX4746HELB+T  
    		MicroDFN;10 pin;
    Dwg: 21-0164B (PDF)
    Use pkgcode/variation: L1022+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX4746HELB+  
    		MicroDFN;10 pin;
    Dwg: 21-0164B (PDF)
    Use pkgcode/variation: L1022+1*
    		-40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis

    Related Products
    MAX4762, MAX4763, MAX4764, MAX4764A, MAX4765 Low-Voltage, Dual SPDT, Audio Clickless Switches with Negative Rail Capability

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     Description 
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    Document Ref.: 19-0563; Rev 1; 2007-02-13
    This page last modified: 2007-02-13




             


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