Analog Audio/Video Crosspoint 4 x 2 28-Pin SOIC W T/R

The MAX4550/MAX4570 serial-interface, programmable, dual 4x2 audio/video crosspoint switches are ideal for multimedia applications. Each device contains two identical crosspoint switch arrays, each with four inputs and two outputs. To improve off-isolation, use the additional crosspoint inputs SA and SB as shunts. Each output is selectively programmable for clickless or regular mode operation. A set of internal resistive voltage-dividers supplies DC bias for each output when using AC-coupled inputs. Additionally, four auxiliary outputs control additional circuitry via the MAX4550/MAX4570"s 2-wire or 3-wire interface. The MAX4550/MAX4570 feature 80O on-resistance, 10O on-resistance matching between channels, 5O on-resistance flatness, and 0.014% total harmonic distortion. Additionally, they feature off-isolation of at least -110dB in the audio frequency range and -78dB at 4MHz, with -95dB crosstalk in the audio frequency range and -54dB at 4MHz. The MAX4550 uses a 2-wire I²C-compatible serial interface, while the MAX4570 uses a 3-wire SPI/QSPI or MICROWIRE-compatible serial interface. These parts are available in 28-pin SSOP and wide SO packages and are tested over either the commercial (0°C to +70°C) or extended (-40°C to +85°C) operating temperature range.

• Selectable Soft Switching Mode for Clickless Audio Operation
• 43O Typical On-Resistance (±5V Supplies)
• 5O Typical On-Resistance Matching Between Channels
• 4O Typical On-Resistance Flatness
• 0.014% Total Harmonic Distortion with 1kO Load
• -110dB Off-Isolation at 20kHz
• -78dB Off-Isolation at 4MHz
• -95dB Crosstalk at 20kHz
• -54dB Crosstalk at 4MHz
• Serial Interface
  • 2-Wire, Fast-Mode, I²C-Compatible (MAX4550)
  • 3-Wire, SPI/QSPI/MICROWIRE-Compatible (MAX4570)

Four Auxiliary Outputs that Extend µP Ports

Single-Supply Operation: +2.7V to +5.5V

Dual-Supply Operation: ±2.7V to ±5.5V