MAX4645EUT-T

Analog Switches, Multiplexers, Demultiplexers Overview

The MAX4645EUT-T is a single-pole, single-throw (SPST) analog switch manufactured by Analog Devices Inc./Maxim Integrated. It operates from a +1.8V to +5.5V single supply and features a typical on-resistance of 2.5Ω at +5V. The device handles Rail-to-Rail analog signals with off-leakage current limited to 0.25nA maximum at +25°C. Switching speeds include a turn-on time of 12ns and a turn-off time of 8ns. It is housed in a 6-pin SOT23 package and functions as a normally open switch within an operating temperature range of -40°C to +85°C.

Analog Switches, Multiplexers, Demultiplexers Feature Summary

• Supports single-supply operation ranging from +1.8V to +5.5V for battery-powered applications
• Provides low on-resistance flatness of 0.4Ω maximum over the specified signal range
• Ensures low leakage currents with a maximum of ±0.25nA at +25°C
• Compatible with TTL/CMOS logic inputs for straightforward control integration

Analog Switches, Multiplexers, Demultiplexers Applications

• Battery-Powered Systems
• Audio and Video Signal Routing
• Low-Voltage Data-Acquisition Systems
• Sample-and-Hold Circuits
• Relay Replacement

Analog Switches, Multiplexers, Demultiplexers Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm the specific ordering suffix matches the required package type and temperature grade. Review the latest datasheet revision for any updates to electrical characteristics or pin configurations before finalizing procurement specifications.

Analog Switches, Multiplexers, Demultiplexers Selection Notes

Select this component when a normally open SPST configuration is required for low-voltage signal routing. Ensure the application voltage stays within the 1.8V to 5.5V range to maintain guaranteed on-resistance values. Consider the 6-pin SOT23 footprint constraints during PCB layout design to ensure adequate thermal dissipation and signal integrity.

Analog Switches, Multiplexers, Demultiplexers Part Context

This part belongs to the MAX4645/MAX4646 family of fast, low-voltage CMOS analog switches. The MAX4645 variant specifically provides a normally open switch state, whereas the MAX4646 offers a normally closed configuration. Both share identical electrical performance metrics and are designed for compact, low-power switching applications.

Analog Switches, Multiplexers, Demultiplexers Replacement Considerations

Direct functional substitutes within the same family include the MAX4646EUT-T for normally closed requirements. Other compatible packages for the MAX4645 include the 5-pin SOT23 (MAX4645EUK-T) and 8-pin µMAX (MAX4645EUA). Verify pin compatibility and package dimensions before substituting.

Analog Switches, Multiplexers, Demultiplexers FAQ

What is the difference between the MAX4645 and MAX4646?

The MAX4645 is a normally open (NO) switch that conducts when the input is high, while the MAX4646 is a normally closed (NC) switch that conducts when the input is low.

Can the MAX4645EUT-T handle signals outside the supply rails?

No, the device processes analog signals strictly within the supply voltage range (GND to V+). Signals exceeding these limits may trigger internal clamping diodes.

What is the maximum power dissipation for the SOT23-6 package?

The continuous power dissipation for the 6-pin SOT23 package is 696mW at +70°C, derating by 8.7mW/°C above this temperature.