MAX4679EUE+

Analog Switches, Multiplexers, Demultiplexers Overview

The MAX4679EUE+ is a quad SPST CMOS analog switch in a 16-pin TSSOP package, operating from -40°C to +85°C. It features two normally closed and two normally open switches with guaranteed break-before-make switching. The device supports single +2.7V to +11V or dual ±2.7V to ±5.5V supplies. Key electrical parameters include a maximum on-resistance of 1.6Ω at ±5V (3.5Ω max at +5V), 0.3Ω channel matching, and 0.4Ω flatness. Off-leakage current is 0.1nA typical at +25°C. Dynamic performance includes a 66MHz -3dB bandwidth, -84dB crosstalk at 1MHz, and turn-on/turn-off times of 350ns/150ns under dual supply conditions.

Analog Switches, Multiplexers, Demultiplexers Feature Summary

• Guaranteed break-before-make switching prevents signal shorting during transitions
• Rail-to-Rail analog signal handling capability across the full supply range
• Separate logic supply input allows independent digital and analog power domains

Analog Switches, Multiplexers, Demultiplexers Applications

• Reed relay replacement in automated test equipment
• Audio signal routing systems
• ADC and data-acquisition systems
• Avionics and communications systems

Analog Switches, Multiplexers, Demultiplexers Procurement Notes

Verify the component against official Analog Devices documentation to confirm pinout compatibility and RoHS status indicated by the plus suffix. Ensure that the specific MAX4679 configuration matches the design requirements for mixed normally open and closed channels. Cross-reference absolute maximum ratings to prevent damage from improper power sequencing or overvoltage conditions during installation.

Analog Switches, Multiplexers, Demultiplexers Selection Notes

Select this component when mixed NO/NC configurations are required within a single package. The separate logic supply enables TTL/CMOS compatibility while maintaining low leakage. Verify that the 1.6Ω on-resistance meets the voltage drop requirements for the target analog signals. Consider the 16-pin TSSOP footprint constraints and thermal dissipation limits for high-density PCB layouts.

Analog Switches, Multiplexers, Demultiplexers Part Context

This part belongs to the MAX4677/MAX4678/MAX4679 family of quad analog switches. Unlike the MAX4677 (all NC) or MAX4678 (all NO), the MAX4679 uniquely combines two NC and two NO switches. This differentiation allows designers to implement complex switching matrices without combining multiple discrete devices, simplifying board space and control logic.

Analog Switches, Multiplexers, Demultiplexers Replacement Considerations

MAX4677EUE+

Analog Switches, Multiplexers, Demultiplexers FAQ

What is the specific switching configuration of the MAX4679?

The MAX4679 contains four SPST switches: two are normally closed (NC) and two are normally open (NO). Switches 2 and 3 are NC, while switches 1 and 4 are NO.

Does the MAX4679 support break-before-make switching?

Yes, the MAX4679 features guaranteed break-before-make switching with a delay of 5ns, ensuring that one path opens before another closes to prevent signal contention.

How does the separate logic supply affect operation?

The VL pin allows the logic supply to operate independently from the analog supply (V+), ranging from +2.7V to V+. This enables TTL/CMOS logic compatibility while supporting higher analog voltages.