General Description

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 voltagedividers 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.

特性 Features

? Selectable Soft Switching Mode for Clickless Audio Operation

? 43? Typical On-Resistance (±5V Supplies)

? 5? Typical On-Resistance Matching Between Channels

? 4? Typical On-Resistance Flatness

? 0.014 Total Harmonic Distortion with 1k? 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

Applications

Set-Top Boxes

PC Multimedia Boards

High-End Audio Systems

Video Conferencing Systems