• Product introduction

MAX4548

Serial control, three sets of 3x2 audio/video crosspoint switches

overview

The MAX4548/MAX4549 serial interface, programmable, triple 3x2 audio/video crosspoint switches are ideal for multimedia applications. These devices include three crosspoint switch matrices with three inputs and two outputs each. To improve off-isolation, each switch matrix has a shunt input and each output is selectively no-noise or programmable for regular mode operation. An optional set of internal resistor dividers provides DC bias for each output when using AC-coupled inputs. To improve crosstalk, the voltage divider includes four external access bypass points.

The MAX4548/MAX4549 feature a 7Ω matching resistor between 35Ω maximum on-resistance, channel, 5Ω resistance flatness, and 0.07% total harmonic distortion (THD). In addition, they have -72dB isolation at 20kHz at 10MHz-85dB and -55dB at 20kHz providing -55dB crosstalk 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 devices are available in a 36-pin SSOP package and are specified for extended (-40°C to +85°C) operating range.

Key features

• The soft switch selects the "click" audio operation mode
• 22 Ω resistor (+5 V supply) typical
• Matching between typical 5Ω on-resistance channels
• The typical on-resistance of 2Ω is flat
• Audio performance
  • Off-isolation from 20kHz to 85dB
  • Crosstalk at 20kHz-85dB
  • 0.07% THD600Ω load
• Video performance
  • -72 dB off isolation at 10MHz
  • Provides -55dB crosstalk at 10MHz
• Serial interface
  • 2-Wire I²C Compatible (MAX4548)
  • 3-WIRE SPI/QSPI/MICROWIRE COMPATIBLE (MAX4549)
• Operates from a single supply from +2.7 V to +5.5 V
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Application/Use

This model is still in mass production, the quantity in stock is not much, need to be ordered by the original factory, please contact for specific delivery and unit priceMicrochip Centennial Electronic Technology (Shenzhen) Co., Ltd