MAX7358ETG+T

Analog Switches - Special Purpose Overview

The MAX7358ETG+T is a 1-to-8 I2C bus switch and multiplexer manufactured by Analog Devices Inc./Maxim Integrated. It expands the main I2C bus to eight extended buses, enabling address conflict isolation. The device operates with a supply voltage (VDD) ranging from 2.3V to 5.5V and supports Standard-Mode (100kbps) and Fast-Mode (400kbps) interfaces. It features enhanced mode capabilities including bus lock-up detection, preconnection wiggle tests, and interrupt notification via the bidirectional RST/INT pin. The component is housed in a 24-pin TQFN package with an exposed pad and is specified for operation over an extended temperature range of -40°C to +85°C.

Analog Switches - Special Purpose Feature Summary

• Enhanced mode provides built-in timer-based bus lock-up detection and isolation for downstream channels.
• Bidirectional RST/INT pin serves as both hardware reset input and active-low interrupt output for fault notification.
• Preconnection wiggle test toggles clock and data lines to verify downstream buses are not stuck high before connection.
• Logic-level translation allows compatibility with various I2C slave devices across different voltage domains.

Analog Switches - Special Purpose Applications

• Servers and RAID systems requiring isolated I2C control paths
• Base stations and networking equipment managing multiple peripheral addresses
• SFP control interfaces needing hot insertion support and fault diagnostics
• Control and automation devices expanding master I2C connectivity

Analog Switches - Special Purpose Procurement Notes

Verify the specific ordering suffix ETG+T corresponds to the 24-pin TQFN-EP package configuration. Confirm RoHS compliance status through official manufacturer documentation or authorized distributors. Ensure the procurement channel provides valid traceability for Analog Devices/Maxim Integrated components to avoid counterfeit risks.

Analog Switches - Special Purpose Selection Notes

Select the MAX7358ETG+T when bus lock-up detection and flush-out sequences are required, distinguishing it from the basic-mode MAX7356. Verify that the application requires the enhanced mode register set for diagnostic access. Ensure the system voltage falls within the 2.3V to 5.5V operating range and that the 24-pin TQFN footprint matches the PCB layout constraints.

Analog Switches - Special Purpose Part Context

This component belongs to the MAX7356/MAX7357/MAX7358 family of 1-to-8 I2C switches. While the MAX7356 offers basic switching only, the MAX7358 adds enhanced diagnostic features like lock-up detection. The 'E' indicates the -40°C to +85°C temperature range, 'TG' denotes the TQFN package, and '+' signifies lead-free/RoHS compliance.

Analog Switches - Special Purpose Replacement Considerations

The MAX7357ETG+T is a functional substitute offering identical enhanced mode features but differing in power-up state behavior. The MAX7356ETG+T serves as a replacement if enhanced diagnostic registers and lock-up detection are unnecessary for the specific design requirements.