MAX397CWI

Analog Switches, Multiplexers, Demultiplexers Overview

The MAX397CWI is a dual, 8-channel low-voltage CMOS analog multiplexer manufactured by Analog Devices Inc. (Maxim Integrated). It operates with single supplies from +2.7V to +16V or dual supplies from ±2.7V to ±8V. The device features a maximum on-resistance of 100Ω at +25°C and guarantees channel-to-channel matching within 6Ω. It provides fast switching speeds with transition times under 250ns and extremely low charge injection of 5pC max. The component offers high off-isolation of -75dB and crosstalk performance of -92dB at 100kHz. It is housed in a 28-pin Wide SO package and supports an industrial temperature range of 0°C to +70°C.

Analog Switches, Multiplexers, Demultiplexers Feature Summary

• Pin-compatible with industry-standard MAX306/MAX307 and DG406/DG407 devices
• Low power consumption below 10μW with TTL/CMOS logic input compatibility
• Guaranteed low leakage currents with off-leakage less than 1nA at +85°C
• ESD protection exceeding 2000V per Method 3015.7

Analog Switches, Multiplexers, Demultiplexers Applications

• Automatic test equipment signal routing
• Industrial process control systems
• Sample-and-hold circuits
• Avionics data acquisition
• Battery-operated low-voltage measurement systems

Analog Switches, Multiplexers, Demultiplexers Procurement Notes

Verify the specific suffix 'CWI' corresponds to the Wide SO package and the 0°C to +70°C operating temperature range. Confirm that the ordering information matches the current manufacturer specifications, as legacy Maxim products may have undergone lifecycle changes or obsolescence notices. Ensure the source documentation explicitly lists this part number variant before finalizing procurement plans.

Analog Switches, Multiplexers, Demultiplexers Selection Notes

Select the MAX397CWI when a dual 8-channel configuration is required for analog signal routing. This part is suitable for applications needing pin compatibility with older MAX306/MAX307 designs while offering improved low-voltage operation down to 2.7V. Consider the Wide SO package constraints and verify that the 100Ω on-resistance meets the system's voltage drop requirements.

Analog Switches, Multiplexers, Demultiplexers Part Context

The MAX397CWI belongs to the MAX396/MAX397 family of precision analog multiplexers. While the MAX396 provides a single-ended 16-channel architecture, the MAX397 offers two independent 8-channel sets, effectively functioning as a differential multiplexer. Both variants share identical electrical characteristics and fabrication processes, differing primarily in channel count and pin assignment for the additional outputs.

Analog Switches, Multiplexers, Demultiplexers Replacement Considerations

Publicly confirmed pin-compatible substitutes include the MAX307, DG407, and DG507A. These components offer equivalent functionality and can be used for direct replacements without circuit redesign, provided their specific electrical tolerances align with the application requirements.