MAX4573CAI+

Analog Switches - Special Purpose Overview

The MAX4573CAI+ is a serially controlled analog switch featuring eleven single-pole single-throw (SPST) channels. It utilizes a 3-wire SPI/QSPI/MICROWIRE-compatible interface for control. The device operates on a single supply voltage ranging from +2.7V to +5.25V. Key electrical specifications include a maximum on-resistance of 35Ω and an audio off-isolation of -90dB at 20kHz. Video off-isolation reaches -50dB at 10MHz, with video crosstalk specified at -52dB at the same frequency. The component supports selectable soft switching mode to eliminate audible clicks during audio signal routing.

Analog Switches - Special Purpose Feature Summary

• Features selectable soft switching mode for clickless audio operation
• Includes 3-wire SPI/QSPI/MICROWIRE-compatible serial interface
• Provides high audio off-isolation and low crosstalk performance

Analog Switches - Special Purpose Applications

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

Analog Switches - Special Purpose Procurement Notes

Verify the ordering suffix CAI corresponds to the commercial temperature range (0°C to +70°C) and the 28-pin SSOP package as listed in the official Maxim Integrated ordering information. Confirm that the specific revision of the datasheet matches the manufacturing date code to ensure compatibility with current design requirements.

Analog Switches - Special Purpose Selection Notes

Select this part when eleven independent SPST switches are required within a single package. The MAX4573 variant is distinct from the MAX4571 due to its 3-wire digital interface, whereas the MAX4571 uses a 2-wire I2C interface. Ensure the system controller supports the required SPI or MICROWIRE protocol timing constraints for reliable data latching.

Analog Switches - Special Purpose Part Context

This component belongs to the MAX4571–MAX4574 family of serially controlled audio/video switches manufactured by Analog Devices Inc./Maxim Integrated. The family differentiates devices by switch topology and digital interface type. The MAX4573 specifically combines the 11-channel SPST configuration of the MAX4571 with the 3-wire serial interface found in the MAX4574 series.

Analog Switches - Special Purpose Replacement Considerations

The MAX4571CAI+ serves as a functional substitute if the system can accommodate a 2-wire I2C interface instead of the 3-wire SPI interface. Other family members like the MAX4574CAI+ offer different switch topologies (SPDT) and are not direct pin-for-pin replacements for the 11-channel SPST requirement.