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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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Status Explanations for product status codes

Active: In Production.

Description

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.

Data Sheet

Download this datasheet in PDF formatDownload Rev 1 (PDF, 215.7kB)
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Key Features

  • Distortion-Free Negative Signal Throughput Down to VCC - 5.5V
  • Internal Shunt Resistor Reduces Click/Pop (MAX4744/MAX4744H)
  • 0.6Ω (typ) Low On-Resistance
  • 0.1Ω (max) Channel-to-Channel Matching
  • 0.55Ω (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)
 

Applications/Uses

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

Key Specifications:

Switches and Multiplexers (Low Voltage)
Part Number Config. Channels VSUPPLY (Single)
(V)
VSUPPLY (Single)
(V)
VSIGNAL
(V)
VSIGNAL
(V)
Dynamic Range (max)
(V)
RON
(Ω)
RFLAT(ON)
(Ω)
RFLAT(ON)
(Ω)
BW
(MHz)
tON
(ns)
tOFF
(ns)
QINJECTION
(pC)
CON
(pF)
COFF
(pF)
Budgetary
Price
min max min max max max typ max min max See Notes
MAX4744 
2-to-1
SPDT
2 1.8 5.5 -3.7 5.5 5.5 0.95 0.55 0.55 25 560 540 550 300 90 $1.25 @1k
MAX4744H 
2-to-1
DPDT
$1.25 @1k
MAX4745 
2-to-1
SPDT
$1.25 @1k
MAX4745H 
2-to-1
DPDT
-
MAX4746H 
2-to-1
DPDT
-
See All Switches and Multiplexers (Low Voltage) (184)

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.



Diagram

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

More Information

Topmark Coding MAX4744
Topmark Coding MAX4745
Topmark Coding MAX4746H

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Key Features
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Key Specifications
Diagram
Notes and Comments
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Document Ref.: 19-0563 Rev 1; 2007-02-13
This page last modified: 2011-12-12