MAX4640ESD+

Analog Switches, Multiplexers, Demultiplexers Overview

The MAX4640ESD+ is a quad single-pole/single-throw (SPST) CMOS analog switch featuring ±15kV ESD protection on NO and NC pins. It operates from a +2V to +12V single supply, consuming 0.5µW power. The device includes two normally open and two normally closed switches with a maximum on-resistance of 70Ω at 5V. It offers rail-to-rail signal handling, TTL/CMOS logic compatibility, and a -3dB bandwidth exceeding 300MHz. Total harmonic distortion is 0.015%. The component is housed in a 14-pin SO package and functions within a temperature range of -40°C to +85°C.

Analog Switches, Multiplexers, Demultiplexers Feature Summary

• Integrated ±15kV ESD protection on analog terminals using bidirectional SCRs
• Rail-to-Rail signal handling capability for low-voltage applications
• TTL/CMOS-compatible digital control inputs
• Guaranteed low leakage current of 0.5nA at +25°C

Analog Switches, Multiplexers, Demultiplexers Applications

• Battery-powered systems
• Audio and video signal routing
• Low-voltage data-acquisition systems
• Sample-and-hold circuits
• Communications circuits

Analog Switches, Multiplexers, Demultiplexers Procurement Notes

Verify the ordering suffix 'ESD+' against official Maxim Integrated documentation to confirm the specific 14-pin SO package configuration and lead-free status. Ensure the procurement channel provides valid traceability for the Analog Devices Inc./Maxim Integrated brand. Cross-reference the part number with the manufacturer's current product status to confirm availability and compliance with RoHS directives before finalizing orders.

Analog Switches, Multiplexers, Demultiplexers Selection Notes

Select this component when designing low-voltage systems requiring high ESD immunity on signal lines. The mixed NO/NC configuration supports break-before-make switching requirements. Verify that the system supply voltage remains within the +2V to +12V range to maintain guaranteed on-resistance specifications. Consider the 14-pin SO package dimensions for PCB layout constraints.

Analog Switches, Multiplexers, Demultiplexers Part Context

This device belongs to the MAX4620/MAX4630/MAX4640 family of low-voltage, high-ESD-protected analog switches. It serves as a pin-compatible replacement for industry-standard 74HC4066 devices. Unlike the MAX4620 (four NO switches) or MAX4630 (four NC switches), the MAX4640 integrates two NO and two NC switches to provide flexible signal routing options.

Analog Switches, Multiplexers, Demultiplexers Replacement Considerations

Pin-compatible replacements include the MAX4620, MAX4630, MAX4066, MAX4610, MAX4611, and MAX4612. Substitution requires verifying the specific switch configuration (NO vs. NC) matches the circuit design requirements.

Analog Switches, Multiplexers, Demultiplexers FAQ

How does the MAX4640 handle overvoltage events?

The device uses internal bidirectional SCRs on the NO and NC pins to bypass ESD surges safely to ground. These SCRs latch on until the current falls below the holding current.

What is the recommended power-supply sequencing?

Proper sequencing requires applying V+ first, followed by the logic inputs, NO/NC, or COM signals, to ensure reliable operation.

Does the MAX4640 support break-before-make switching?

Yes, the MAX4640 specifically features break-before-make timing between its switches, unlike the MAX4620 and MAX4630.