MAX4746HELB+T

Analog Switches - Special Purpose Overview

The MAX4746HELB+T is a dual SPDT analog switch from the MAX4744/MAX4745 family, manufactured by Analog Devices Inc./Maxim Integrated. It operates on a single +1.8V to +5.5V supply and supports negative signal throughput down to VCC - 5.5V. Key electrical parameters include a typical on-resistance of 0.6Ω, maximum channel-to-channel matching of 0.1Ω, and maximum on-resistance flatness of 0.55Ω. The device features a typical total harmonic distortion of 0.01%, crosstalk of -75dB, and off-isolation of -68dB at 100kHz. It is housed in a 10-pin µDFN package (2mm x 2mm) and operates within a temperature range of -40°C to +85°C.

Analog Switches - Special Purpose Feature Summary

• Negative signal capability allows signals as low as VCC - 5.5V to pass through without distortion.
• Internal shunt resistors automatically discharge capacitance at normally open and normally closed terminals to reduce click-and-pop sounds.
• Break-before-make switching feature further reduces audible popping during audio signal transitions.
• Integrated protection network prevents damage when voltages are applied to COM_ terminals while VCC is 0V.

Analog Switches - Special Purpose Applications

• Speaker Switching
• Power Routing
• Cellular Phones
• MP3 Players
• Notebook Computers

Analog Switches - Special Purpose Procurement Notes

Verify the specific ordering suffix ELB against the manufacturer's current part numbering system to confirm the presence of internal shunt resistors and COM protection features. Ensure the component matches the 10-pin µDFN package dimensions and lead-free specifications indicated by the '+' suffix. Cross-reference the datasheet revision date with the production lot to ensure compliance with current manufacturing standards.

Analog Switches - Special Purpose Selection Notes

Select this component for applications requiring low-voltage operation and minimal audio distortion. The inclusion of internal shunt resistors makes it suitable for direct speaker connections where transient noise suppression is critical. Verify that the control logic levels are compatible with the system's digital interface, as inputs accept up to +5.5V regardless of the supply voltage.

Analog Switches - Special Purpose Part Context

This device belongs to the MAX4744/MAX4745 series of low-voltage, dual SPDT audio switches. The 'H' variant designation indicates the inclusion of an enable input and COM protection circuitry, distinguishing it from the standard non-H versions. The 'ELB' suffix specifies the package type and thermal characteristics within the µDFN form factor.

Analog Switches - Special Purpose Replacement Considerations

Direct substitutes include MAX4744HELB+T, MAX4745HELB+T, and MAX4745HELB+T from the same family. These parts share identical pinouts and core electrical characteristics but may differ in control bit configurations or protection features.