MAX4509ESE+T

Analog Switches, Multiplexers, Demultiplexers Overview

The MAX4509ESE+T is a dual 4-to-1 fault-protected multiplexer housed in a 16-pin Narrow SOIC package. It operates with dual supplies of ±4.5V to ±20V or a single supply of +9V to +36V. The device features ±40V overvoltage protection when powered off and ±25V protection when powered on, with signals clamped at 150mV beyond the rails. Key electrical parameters include a maximum on-resistance of 400 Ω, an on-resistance match between channels of 15 Ω max, and a fault-response time of 20 ns. Logic inputs are TTL/CMOS compatible.

Analog Switches, Multiplexers, Demultiplexers Feature Summary

• Fault-protected analog signal handling with rail-to-rail capability
• Internal output clamping during overvoltage conditions
• No power-supply sequencing required for operation
• All channels automatically turn off when power is removed

Analog Switches, Multiplexers, Demultiplexers Applications

• Data-acquisition systems
• Industrial and process control
• Avionics signal routing
• Redundant and backup systems

Analog Switches, Multiplexers, Demultiplexers Procurement Notes

Verify the specific suffix 'T' indicates tape-and-reel packaging rather than tube packaging when sourcing components. Confirm that the '+E' designation corresponds to the -40°C to +85°C industrial temperature range and lead-free construction as specified in the manufacturer's ordering guide. Ensure compatibility with the 16-pin Narrow SOIC footprint during procurement planning.

Analog Switches, Multiplexers, Demultiplexers Selection Notes

Select this component for applications requiring high-voltage fault protection without external clamping diodes. The dual 4-to-1 configuration allows independent signal routing compared to the single 8-to-1 variant. Verify that the 400 Ω maximum on-resistance meets the system's voltage drop requirements. Ensure logic levels align with the specified TTL/CMOS thresholds for the chosen supply voltage.

Analog Switches, Multiplexers, Demultiplexers Part Context

This part belongs to the MAX4508/MAX4509 family of fault-protected multiplexers. It serves as the dual-channel counterpart to the MAX4508, which provides a single 8-to-1 configuration. Both devices share identical pinouts and electrical characteristics regarding fault protection and switching speeds, differing only in channel count and internal decoder logic.

Analog Switches, Multiplexers, Demultiplexers Replacement Considerations

The datasheet notes pin compatibility with industry-standard DG508/DG509 devices. Engineers replacing legacy parts should verify that the replacement supports the required ±40V fault protection level and matches the 16-pin SOIC package dimensions.