MAX4550CAI+

Analog Switches - Special Purpose Overview

The MAX4550CAI+ is a serially controlled, dual 4x2 audio/video analog crosspoint switch manufactured by Analog Devices. It operates within a supply voltage range of +2.7V to +5.5V (single) or ±2.7V to ±5.5V (dual). The device features an on-resistance of 80Ω maximum and 10Ω matching between channels. It provides -110dB off-isolation at 20kHz and -95dB crosstalk in the audio frequency range. The component utilizes a 2-wire I²C-compatible interface for control and is housed in a 28-pin SSOP package.

Analog Switches - Special Purpose Feature Summary

• Dual 4x2 crosspoint switch arrays with selectable clickless mode for noiseless audio switching
• 2-wire I²C-compatible serial interface for programming switch states and auxiliary outputs
• Internal bias networks provide DC bias for AC-coupled inputs
• Auxiliary outputs extend microprocessor port capabilities

Analog Switches - Special Purpose Applications

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

Analog Switches - Special Purpose Procurement Notes

Verify the specific suffix 'CAI+' against official documentation to confirm the commercial temperature range and lead-free status. Ensure the design supports the required I²C bus speed and address configuration via A0/A1 pins. Confirm that the 28-pin SSOP footprint matches the PCB layout requirements.

Analog Switches - Special Purpose Selection Notes

Select this part when a dual 4x2 matrix with low distortion is required. The MAX4550 variant uses a 2-wire interface; consider the MAX4570 if a 3-wire SPI/MICROWIRE interface is preferred. Verify that the single-supply operation meets the signal swing requirements for the application.

Analog Switches - Special Purpose Part Context

This component belongs to the MAX4550/MAX4570 family of serially controlled crosspoint switches. The 'C' designation indicates a commercial operating temperature range of 0°C to +70°C. The 'I' denotes the 28-pin SSOP package. The '+' suffix signifies compliance with RoHS standards.

Analog Switches - Special Purpose Replacement Considerations

The MAX4550EWI serves as a wide-temperature (-40°C to +85°C) alternative in a Wide SO package. The MAX4570 series offers identical electrical performance but utilizes a 3-wire serial interface instead of the 2-wire I²C interface.