MAX4521EEE+

Analog Switches, Multiplexers, Demultiplexers Overview

The MAX4521EEE+ is a quad, low-voltage, single-pole/single-throw (SPST) analog switch manufactured by Analog Devices Inc./Maxim Integrated. It features four normally closed (NC) switches with a maximum on-resistance of 100Ω and a maximum on-resistance flatness of 12Ω over the signal range. The device operates from dual supplies ranging from ±2V to ±6V or a single supply between +2V and +12V. It offers an off-leakage current of 1nA at +25°C and 10nA at +85°C. The component is housed in a 16-pin QSOP package and supports an operating temperature range of -40°C to +85°C.

Analog Switches, Multiplexers, Demultiplexers Feature Summary

• Four internally matched SPST switches handle rail-to-rail analog signals.
• TTL/CMOS-compatible digital inputs ensure logic compatibility at standard supply voltages.
• Low power consumption design suitable for battery-operated equipment.
• ESD protection rated at 2kV per Method 3015.7.

Analog Switches, Multiplexers, Demultiplexers Applications

• Battery-operated equipment
• Data acquisition systems
• Test equipment
• Avionics
• Audio signal routing

Analog Switches, Multiplexers, Demultiplexers Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm the package type and temperature rating. Ensure that the 'EEE' designation corresponds to the required 16-pin QSOP form factor and the '-40°C to +85°C' industrial temperature range before finalizing procurement specifications.

Analog Switches, Multiplexers, Demultiplexers Selection Notes

Select this component when a quad SPST configuration with normally closed contacts is required. Verify that the system voltage falls within the specified single or dual supply limits. Consider the 100Ω on-resistance and 1nA leakage characteristics against the application's signal integrity requirements.

Analog Switches, Multiplexers, Demultiplexers Part Context

This part belongs to the MAX4521/MAX4522/MAX4523 family of low-voltage CMOS analog switches. While the MAX4522 variant provides normally open switches and the MAX4523 offers a mixed configuration, the MAX4521 specifically provides four normally closed channels. All variants share similar electrical performance metrics and pinout structures.

Analog Switches, Multiplexers, Demultiplexers Replacement Considerations

Direct replacement options include other members of the MAX452x family, such as the MAX4522EEE+ or MAX4523EEE+, provided the NC/NO logic state aligns with the circuit design. Cross-family replacements require verification of on-resistance, leakage, and supply voltage compatibility.

Analog Switches, Multiplexers, Demultiplexers FAQ

What is the default state of the switches in the MAX4521?

The MAX4521 contains four normally closed (NC) switches, meaning the signal path is connected when the logic input is low.

How does the MAX4521 handle analog signals exceeding the supply rails?

Internal reverse ESD-protection diodes clamp any analog signal that exceeds V+ or V-, limiting forward-diode current to the maximum rating.

Is the MAX4521 compatible with TTL logic levels?

Yes, the digital inputs have +0.8V and +2.4V logic thresholds, ensuring TTL/CMOS-logic compatibility when using ±5V or a single +5V supply.