MAX4630ESD

Analog Switches, Multiplexers, Demultiplexers Overview

The MAX4630ESD is a quad, single-pole/single-throw (SPST) CMOS analog switch featuring normally closed (NC) contacts. It operates on a single supply from +2V to +12V and provides ±15kV ESD protection on the NO/NC pins. The device offers an on-resistance of 70Ω max at 5V and 120Ω max at 3V, with typical matching of 0.5Ω at 5V. It supports rail-to-rail signal ranges, has a -3dB bandwidth exceeding 300MHz, and draws only 0.5µW power. Available in 14-pin SO packages, it functions within a temperature range of -40°C to +85°C.

Analog Switches, Multiplexers, Demultiplexers Feature Summary

• Provides ±15kV Human Body Model and IEC 1000-4-2 air-gap discharge ESD protection on NC/NO terminals using bidirectional SCRs.
• Features pin-compatible design with industry-standard 74HC4066 switches for easy integration into existing layouts.
• Supports TTL/CMOS logic levels for control while handling full rail-to-rail analog signals across the supply voltage range.

Analog Switches, Multiplexers, Demultiplexers Applications

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

Analog Switches, Multiplexers, Demultiplexers Procurement Notes

Verify the specific package suffix 'ESD' corresponds to the 14-pin Small Outline (SO) configuration when sourcing components. Confirm that the operating environment remains within the specified -40°C to +85°C temperature range to ensure performance stability. Check datasheet notes regarding absolute maximum ratings to prevent damage during power sequencing or overvoltage events.

Analog Switches, Multiplexers, Demultiplexers Selection Notes

Select this component when normally closed signal paths are required, as opposed to the MAX4620 which uses normally open contacts. Ensure the application voltage stays within the 2V to 12V single-supply limit. Consider the 70Ω on-resistance at 5V for signal integrity requirements. Verify that the 300MHz bandwidth meets the frequency demands of the intended signal path.

Analog Switches, Multiplexers, Demultiplexers Part Context

This part belongs to the MAX4620/MAX4630/MAX4640 family of low-voltage, high-ESD-protected analog switches. While the MAX4620 contains four normally open switches and the MAX4640 combines two normally open and two normally closed switches, the MAX4630 specifically provides four normally closed channels. All variants share identical pinouts and electrical characteristics except for the switch state logic.

Analog Switches, Multiplexers, Demultiplexers Replacement Considerations

The MAX4630 serves as a direct pin-compatible replacement for the 74HC4066 analog switch. It is also compatible with the MAX4066 and the MAX4610/MAX4611/MAX4612 series, allowing for drop-in upgrades where higher ESD protection or lower on-resistance is desired without changing the board layout.

Analog Switches, Multiplexers, Demultiplexers FAQ

How does the MAX4630 handle ESD events on the signal pins?

The device incorporates bidirectional SCRs on the NC/NO terminals that turn on within nanoseconds if voltages exceed the rails, safely bypassing surge current to ground. This protects against ±15kV Human Body Model discharges.

What is the difference between the MAX4630 and MAX4620?

The primary difference is the switch state: the MAX4630 contains four normally closed (NC) switches, whereas the MAX4620 contains four normally open (NO) switches. They are otherwise electrically identical and pin-compatible.

Can this switch handle signals that exceed the supply voltage?

Yes, the MAX4630 features 'Beyond-the-Rails' capability, allowing it to handle analog signals ranging from GND to V+, effectively covering the entire supply voltage range.