MAX4570EAI+

Analog Switches - Special Purpose Overview

The MAX4570EAI+ is a serially controlled, dual 4x2 audio/video analog crosspoint switch manufactured by Analog Devices/Maxim Integrated. It features two independent 4-input, 2-output switch arrays within a 28-pin SSOP package. The device operates on a single supply voltage ranging from +2.7V to +5.5V or dual supplies of ±2.7V to ±5.5V. It utilizes a 3-wire SPI/QSPI/MICROWIRE-compatible interface for configuration. Key electrical parameters include an on-resistance of 80Ω maximum, 10Ω matching between channels, and 5Ω flatness. Audio performance specifications include -110dB off-isolation at 20kHz and -95dB crosstalk at 20kHz. Video performance reaches -78dB off-isolation and -54dB crosstalk at 4MHz. The component supports clickless switching modes and includes four auxiliary outputs.

Analog Switches - Special Purpose Feature Summary

• Dual 4x2 crosspoint switch architecture with selectable clickless operation for noise-free audio switching
• 3-wire serial interface compatible with SPI, QSPI, and MICROWIRE protocols
• Internal bias resistor networks for DC biasing AC-coupled inputs
• Four programmable auxiliary outputs for extended microprocessor port control

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 ordering suffix against official documentation to confirm temperature range and package type. The 'E' suffix indicates an extended temperature range of -40°C to +85°C, while 'C' denotes commercial range. Ensure the '+'' suffix confirms lead-free/RoHS compliance status as per current manufacturer standards. Cross-reference pin configurations if substituting from older revisions.

Analog Switches - Special Purpose Selection Notes

Select the MAX4570EAI+ when a 3-wire serial interface is required rather than the I2C-compatible MAX4550. This part is suitable for applications demanding high off-isolation in both audio and video frequency ranges. Consider the internal bias network availability if AC coupling is used. Verify that the 28-pin SSOP package fits the PCB layout constraints and thermal requirements.

Analog Switches - Special Purpose Part Context

The MAX4570EAI+ belongs to the MAX4550/MAX4570 family of serially controlled analog crosspoint switches. It shares identical electrical characteristics and pinouts with the MAX4550, differing primarily in the serial communication protocol. The MAX4570 variant specifically supports SPI/QSPI/MICROWIRE interfaces, making it distinct within the series for systems utilizing these standard digital buses.

Analog Switches - Special Purpose Replacement Considerations

MAX4550EAI+ is functionally equivalent but uses a 2-wire I2C interface instead of 3-wire SPI.