MAX4908ETD+T

Analog Switches - Special Purpose Overview

The MAX4908ETD+T is a dual 3:1 clickless audio multiplexer manufactured by Analog Devices Inc./Maxim Integrated. It operates from a single +1.8V to +5.5V supply and features negative-signal capability, allowing signals as low as VCC - 5.5V to pass without distortion. The device includes internal shunt resistors on all input terminals to reduce click-and-pop sounds. Key electrical parameters include a typical on-resistance of 0.38Ω, a maximum channel-to-channel matching of 0.1Ω, and a typical supply current of 2µA at +5.5V. It offers -70dB crosstalk and -80dB off-isolation at 20kHz.

Analog Switches - Special Purpose Feature Summary

• Negative-signal throughput capability down to VCC - 5.5V for distortion-free operation
• Internal shunt resistors on all input terminals to automatically discharge capacitance and suppress audible switching artifacts
• Break-before-make switching logic to prevent momentary connection of old and new signal paths

Analog Switches - Special Purpose Applications

• Cell Phones
• PDAs and Handheld Devices
• Notebook Computers
• MP3 Players

Analog Switches - Special Purpose Procurement Notes

Verify the component against official Maxim Integrated datasheets to confirm pinout compatibility and functional specifications before integration. Ensure that the ordering suffix matches the required package type and temperature range. Cross-reference with authorized distributors to validate authenticity and traceability.

Analog Switches - Special Purpose Selection Notes

Select this component when designing audio routing circuits requiring low on-resistance and minimal signal distortion. The integrated shunt resistors make it suitable for applications sensitive to switching noise. Verify that the control logic levels are compatible with the system's digital interface, as inputs accept up to +5.5V independent of the supply voltage.

Analog Switches - Special Purpose Part Context

The MAX4908ETD+T belongs to the MAX4908/MAX4909/MAX4930/MAX4932 family of dual 3:1 clickless audio multiplexers. This series is designed for portable electronics where power consumption and audio quality are critical. The ETD suffix indicates a 14-pin TDFN-EP package, distinguishing it from the WLP variants within the same functional family.

Analog Switches - Special Purpose Replacement Considerations

Direct substitutes within the same family include the MAX4909ETD+T, which lacks shunt resistors on X0 and Y0 terminals. Other variants like MAX4930ETD+T and MAX4932ETD+T offer different shunt resistor configurations. Ensure the replacement matches the specific terminal resistance requirements of the design.