MAX4509CSE+

Analog Switches, Multiplexers, Demultiplexers Overview

The MAX4509CSE+ is a dual 4-to-1 fault-protected multiplexer in a 16-pin Narrow SO package. It operates with dual supplies of ±4.5V to ±20V or a single supply of +9V to +36V. Key electrical parameters include a maximum on-resistance of 400Ω and an on-resistance match between channels of 15Ω max. The device provides ±40V fault protection with power off and ±25V protection with supplies on. Logic inputs are TTL/CMOS compatible, requiring V_AH ≥ +2.4V and V_AL ≤ +0.8V. Operating temperature range is 0°C to +70°C.

Analog Switches, Multiplexers, Demultiplexers Feature Summary

• Fault-protected analog signal handling with rail-to-rail capability
• Dual 4-to-1 multiplexing architecture with independent outputs
• TTL and CMOS logic input compatibility without sequencing requirements

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 C suffix indicates commercial temperature range (0°C to +70°C) and the SE+ suffix denotes the narrow SOIC package with lead-free composition. Confirm the component status against current manufacturer announcements as legacy parts may face obsolescence. Ensure ESD precautions are observed during handling due to MOSFET input structures.

Analog Switches, Multiplexers, Demultiplexers Selection Notes

Select this part for applications requiring high-voltage fault tolerance on analog inputs while maintaining standard logic interface levels. The dual 4-to-1 configuration suits systems needing two independent signal paths. Verify that the 400Ω maximum on-resistance meets system loss requirements compared to lower-resistance alternatives.

Analog Switches, Multiplexers, Demultiplexers Part Context

This component belongs to the MAX4508/MAX4509 family of fault-protected multiplexers. The MAX4509 specifically offers a dual 4-to-1 topology, whereas the MAX4508 provides a single 8-to-1 configuration. Both share identical pinouts and electrical characteristics, facilitating design flexibility within the same footprint constraints.

Analog Switches, Multiplexers, Demultiplexers Replacement Considerations

The datasheet notes pin compatibility with industry-standard DG508/DG509 devices. Designers replacing these parts should verify that the substitute supports the specific ±40V fault protection rating and rail-to-rail signal handling capabilities required by the original circuit design.