MAX4571CEI+T

Analog Switches - Special Purpose Overview

The MAX4571CEI+T is a serially controlled audio/video switch IC featuring eleven SPST switches. It operates on a single supply voltage ranging from +2.7V to +5.25V and utilizes a 2-wire I²C-compatible interface for control. The device provides a maximum on-resistance of 35Ω with a bandwidth exceeding 150MHz. It supports selectable soft switching mode for clickless audio operation, achieving -90dB audio off-isolation at 20kHz and -50dB video off-isolation at 10MHz. The component is housed in a 28-pin SSOP package and functions within a commercial temperature range of 0°C to +70°C.

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 communication.
• Delivers high isolation performance with -90dB audio off-isolation and -50dB video off-isolation specifications.

Analog Switches - Special Purpose Applications

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

Analog Switches - Special Purpose Procurement Notes

Verify the specific ordering suffix against official manufacturer documentation to confirm the package type and temperature rating. Ensure the I²C address pins are correctly configured for the target bus topology. Confirm that the host controller supports the required write protocols for command execution.

Analog Switches - Special Purpose Selection Notes

Select this part when an I²C interface is preferred over SPI for controlling multiple analog switches. The MAX4571 variant is appropriate for designs requiring numerous independent SPST channels rather than multiplexing configurations found in other family members.

Analog Switches - Special Purpose Part Context

This component belongs to the MAX4571–MAX4574 series of serially controlled switches manufactured by Analog Devices / Maxim Integrated. The CEI suffix indicates the commercial temperature grade and SSOP packaging. Other variants in the series offer different switch counts or SPI interfaces.

Analog Switches - Special Purpose Replacement Considerations

Public confirmed substitute part numbers: MAX4571EAI+, MAX4571EWI+

Analog Switches - Special Purpose FAQ

How does the soft switching mode function?

Soft mode slows the switching transition time to prevent audible clicks when routing audio signals. If a new command interrupts a transition, the device accelerates to reach the final state before executing the next instruction.

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

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

How is the I²C address determined?

The device address is configured by connecting the A0 and A1 pins to V+ or GND. These pin states must match the corresponding bits in the address byte sent by the master controller.