MAX4571CWI+

Analog Switches - Special Purpose Overview

The MAX4571CWI+ is a serially controlled analog switch featuring eleven SPST channels in a 28-pin wide SO package. It operates on a single supply from +2.7V to +5.25V with a maximum on-resistance of 35Ω and an on-resistance flatness of 6Ω. The device utilizes a 2-wire I²C-compatible interface for control. Audio performance includes -90dB off-isolation at 20kHz and -90dB crosstalk at 20kHz. Video specifications provide -50dB off-isolation at 10MHz and -52dB crosstalk at 10MHz, with a bandwidth exceeding 150MHz. It supports selectable soft switching mode for clickless audio operation.

Analog Switches - Special Purpose Feature Summary

• Features selectable soft switching mode to eliminate audible clicking during audio signal routing transitions.
• Incorporates a 2-wire I²C-compatible serial interface requiring minimal microprocessor port lines for control.
• Provides high isolation levels suitable for both audio and video signal paths.

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 'CWI+' against the manufacturer's current datasheet to confirm the commercial temperature range (0°C to +70°C) and the specific 28-pin Wide SO package configuration. Ensure the component meets RoHS compliance requirements as indicated by the '+' suffix. Confirm that the I²C address pins A0 and A1 are correctly configured for the target system bus topology.

Analog Switches - Special Purpose Selection Notes

Select this part when an I²C interface is required rather than SPI or Microwire. Choose the MAX4571 variant specifically for designs needing eleven independent SPST switches. Verify that the system voltage falls within the +2.7V to +5.25V range. Consider the MAX4572 if six SPDT switches are needed instead of SPST configurations.

Analog Switches - Special Purpose Part Context

This component belongs to the MAX4571–MAX4574 family of serially controlled switches manufactured by Analog Devices/Maxim Integrated. The MAX4571 is distinguished by its eleven SPST switch configuration, whereas other family members offer different combinations of SPST and SPDT switches. All variants share similar electrical characteristics and interface protocols.

Analog Switches - Special Purpose Replacement Considerations

Public confirmed substitute part numbers: MAX4571CEI, MAX4571CAI, MAX4571EWI, MAX4571EAI.

Analog Switches - Special Purpose FAQ

How does the soft switching mode function?

Soft switching mode slows down the switching transition time to prevent audible clicking artifacts when routing audio signals. If a new command is issued during a transition, the switch reaches its final state before executing the new command.

What is the default power-up state of the switches?

Upon power-up, all switches are in the open state and configured in soft switching mode.

How is the I²C address determined?

The device uses a 2-wire I²C-compatible interface. The address is determined by the logic levels present at the A0 and A1 pins, which must match the corresponding bits in the address byte sent by the master.