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Serially Controlled, Triple 3x2 Audio/Video Crosspoint Switches

Product Details

Key Features

Parametric specs for Audio/Video Routing (Unbuffered)
Functions Crosspoint
Configuration 3 x 3-to-2
Interface 2-Wire
Serial
RON (Ω) (max) 35
ILEAK(OFF) (nA) (max) 10
RFLAT(ON) (Ω) (max) 5
tON (ns) (max) 400
Package/Pins SSOP/36
Budgetary
Price (See Notes)
6.6
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Simplified Block Diagram

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Parameters

Parametric specs for Audio/Video Routing (Unbuffered)
Functions Crosspoint
Configuration 3 x 3-to-2
Interface 2-Wire
Serial
RON (Ω) (max) 35
ILEAK(OFF) (nA) (max) 10
RFLAT(ON) (Ω) (max) 5
tON (ns) (max) 400
Package/Pins SSOP/36
Budgetary
Price (See Notes)
6.6

Key Features

  • Selectable Soft-Switching Mode for "Clickless" Audio Operation
  • 22Ω Typical On-Resistance (+5V Supply)
  • 5Ω Typical On-Resistance Matching Between Channels
  • 2Ω Typical On-Resistance Flatness
  • Audio Performance
    • -85dB Off-Isolation at 20kHz
    • -85dB Crosstalk at 20kHz
    • 0.07% THD with 600Ω Load
  • Video Performance
    • -72dB Off-Isolation at 10MHz
    • -55dB Crosstalk at 10MHz
  • Serial Interface
    • 2-Wire I²C-Compatible (MAX4548)
    • 3-Wire SPI/QSPI/MICROWIRE-Compatible (MAX4549)
  • Single-Supply Operation from +2.7V to +5.5V

Applications/Uses

  • High-End Audio Systems
  • PC Multimedia Boards
  • Security Systems
  • Set-Top Boxes
  • Video Conferencing Systems

Description

The MAX4548/MAX4549 serial-interface, programmable, triple 3x2 audio/video crosspoint switches are ideal for multimedia applications. The devices include three crosspoint switch matrices, each containing three inputs and two outputs. To improve off-isolation, each switch matrix has a shunt input and each output is selectively programmable for clickless or regular-mode operation. A selectable set of internal resistive voltage dividers supplies DC bias for each output when using AC-coupled inputs. To improve crosstalk, the voltage dividers include four externally accessible bypass points.

The MAX4548/MAX4549 feature 35Ω max on-resistance, 7Ω on-resistance matching between channels, 5Ω on-resistance flatness, and 0.07% total harmonic distortion (THD). Additionally, they feature off-isolation of -85dB at 20kHz and -72dB at 10MHz, with crosstalk of -85dB at 20kHz and -55dB at 10MHz. The MAX4548 uses a 2-wire I²-compatible serial interface, while the MAX4549 uses a 3-wire SPI™/QSPI™/MICROWIRE™-compatible serial interface. These parts are available in 36-pin SSOP packages and are specified for the extended (-40°C to +85°C) operating range.

Simplified Block Diagram

MAX4548, MAX4549: Pin Configuration MAX4548, MAX4549: Pin Configuration Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .