MAX4908EWC+T

Analog Switches - Special Purpose Overview

The MAX4908EWC+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 with a typical supply current of 2µA at VCC = +5.5V and 4µA at VCC = +2.7V. The device features a low on-resistance of 0.38Ω (typ) and supports negative signal throughput down to VCC - 5.5V. Digital control inputs CB1 and CB2 accept up to +5.5V independent of the supply voltage. It includes internal shunt resistors on all input terminals for click-and-pop suppression, offers -70dB crosstalk and -80dB off-isolation at 20kHz, and operates within an extended 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 on all input terminals automatically discharge capacitance to reduce audible click-and-pop sounds
• Break-before-make switching prevents momentary connection of old and new signal paths during transitions
• Digital control inputs accept logic levels up to +5.5V regardless of the positive supply voltage

Analog Switches - Special Purpose Applications

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

Analog Switches - Special Purpose Procurement Notes

Verify the component authenticity using official manufacturer documentation and authorized distributor channels. Confirm that the ordering suffix matches the specific package type required for your design. Ensure compliance with RoHS standards indicated by the plus sign in the part number. Cross-reference the datasheet revision to confirm parameter consistency before finalizing procurement specifications.

Analog Switches - Special Purpose Selection Notes

Select this component when designing portable audio systems requiring low power consumption and high signal integrity. The WLP-12 package is suitable for space-constrained handheld applications. Verify that the system supply voltage falls within the +1.8V to +5.5V range. Consider the internal shunt resistors if click-and-pop suppression is critical for the audio output stage.

Analog Switches - Special Purpose Part Context

This component belongs to the MAX4908/MAX4909/MAX4930/MAX4932 family of dual 3:1 analog switches. The MAX4908 variant specifically includes shunt resistors on all input terminals, distinguishing it from the MAX4909, MAX4930, and MAX4932 which have different or no shunt resistor configurations. All variants share similar electrical characteristics regarding on-resistance and supply voltage ranges.

Analog Switches - Special Purpose Replacement Considerations

Direct substitutes within the same family include the MAX4909EWC+T, MAX4930EWC+T, and MAX4932EWC+T. These alternatives differ primarily in the presence and location of internal shunt resistors. Verify that the specific terminal resistance requirements match the application needs before substituting.