MAX4631ESE

Analog Switches, Multiplexers, Demultiplexers Overview

The MAX4631ESE is a high-voltage, dual analog switch manufactured by Analog Devices Inc./Maxim Integrated. It features two normally open single-pole/single-throw (SPST) switches housed in a 16-pin Narrow SO package with an operating temperature range of 0°C to +70°C. The device supports dual power supplies from ±4.5V to ±18V or a single supply between +9V and +36V. Key electrical parameters include a maximum on-resistance of 85 Ω at +25°C, an off-leakage current of 0.5nA at +25°C, and a turn-on time of up to 150ns. The inputs are fault-protected against overvoltages up to ±36V during operation and ±40V when powered off.

Analog Switches, Multiplexers, Demultiplexers Feature Summary

• Fault protection for NO_ and NC_ terminals against overvoltage faults up to 36V during power-up or power-down
• Rail-to-Rail signal handling capabilities ensuring unambiguous outputs during fault transitions
• Pin compatible with industry-standard DG401/DG403/DG405 devices
• TTL- and CMOS-logic compatible inputs without requiring power-supply sequencing

Analog Switches, Multiplexers, Demultiplexers Applications

• Automated Test Equipment (ATE)
• Data Acquisition Systems
• Industrial and Process Control Systems
• Avionics Applications
• Redundant/Backup Systems

Analog Switches, Multiplexers, Demultiplexers Procurement Notes

Verify the specific suffix 'E' confirms the commercial temperature range of 0°C to +70°C and the Narrow SOIC package type. Confirm RoHS compliance status as indicated in official documentation. Ensure the ordering code matches the exact pin configuration required for your design. Check for any recent product change notices regarding manufacturing updates.

Analog Switches, Multiplexers, Demultiplexers Selection Notes

Select this component when upgrading legacy designs using DG401/DG403/DG405 switches that require enhanced fault protection. It is suitable for applications needing rail-to-rail signal handling and TTL/CMOS logic compatibility. Consider the 85Ω maximum on-resistance and 150ns switching speed for timing constraints. Verify that the ±36V fault protection rating meets the system's voltage requirements.

Analog Switches, Multiplexers, Demultiplexers Part Context

The MAX4631ESE belongs to the MAX4631/MAX4632/MAX4633 family of fault-protected, high-voltage dual analog switches. This series upgrades standard CMOS switches by adding input fault protection while maintaining pin compatibility with older industry standards. The MAX4631 variant specifically provides two SPST switches, distinguishing it from the SPDT MAX4632 and DPST MAX4633 models within the same family.

Analog Switches, Multiplexers, Demultiplexers Replacement Considerations

The MAX4631ESE is pin-compatible with the DG401. However, verify that the existing circuit does not rely on non-fault-protected behavior for COM_ pins, as only NO_ and NC_ pins are protected. Ensure the replacement supports the required voltage ranges and thermal characteristics.