MAX4549EAX+T

Analog Switches - Special Purpose Overview

The MAX4549EAX+T is a triple 3x2 audio/video crosspoint switch featuring a 3-wire SPI/QSPI/MICROWIRE-compatible serial interface. It operates on a single supply voltage ranging from +2.7V to +5.5V and is housed in a 36-pin SSOP package. The device includes three independent switch matrices, each with three inputs and two outputs. Key electrical specifications include a maximum on-resistance of 35Ω at +5V and 60Ω at +3V, with typical values of 22Ω and 40Ω respectively. On-resistance matching between channels is typically 7Ω, and flatness is typically 5Ω. The -3dB bandwidth reaches 250MHz at +5V and 200MHz at +3V. Audio performance metrics include -85dB off-isolation and crosstalk at 20kHz, with 0.07% total harmonic distortion at +5V. Video performance provides -72dB off-isolation and -55dB crosstalk at 10MHz. The component supports selectable soft-switching for clickless operation and functions within an extended temperature range of -40°C to +85°C.

Analog Switches - Special Purpose Feature Summary

• Triple 3x2 crosspoint switch matrix architecture
• Selectable soft-switching mode for clickless audio operation
• Internal bias network with externally accessible bypass points
• Break-before-make switching capability

Analog Switches - Special Purpose Applications

• Set-Top Boxes
• PC Multimedia Boards
• Video Conferencing Systems
• High-End Audio Systems
• Security Systems

Analog Switches - Special Purpose Procurement Notes

Verify the ordering suffix '+T' corresponds to tape-and-reel packaging rather than tube packaging when sourcing components. Confirm that the specific revision matches the required datasheet version. Ensure the supplier source is authorized to guarantee RoHS compliance and authenticity. Cross-reference the full part number against manufacturer databases to validate availability status.

Analog Switches - Special Purpose Selection Notes

Select this component over the MAX4548 variant if a 3-wire serial interface (SPI/QSPI/MICROWIRE) is required instead of a 2-wire I2C interface. Consider the 36-pin SSOP package constraints for PCB layout. Evaluate the need for internal bias networks and shunt inputs to improve off-isolation in AC-coupled applications. Verify that the operating voltage range meets the system's power supply requirements.

Analog Switches - Special Purpose Part Context

The MAX4549 belongs to the MAX4548/MAX4549 family of serially controlled analog switches. It shares identical pinout and electrical characteristics with the MAX4548, differing only in the serial communication protocol. Both devices are designed for multimedia signal routing applications requiring low distortion and high isolation. The EAX+ designation indicates the standard commercial/industrial temperature grade and lead-free construction.

Analog Switches - Special Purpose Replacement Considerations

The MAX4548EAX+ serves as a direct functional substitute if the system design accommodates a 2-wire I2C interface instead of the 3-wire SPI interface used by the MAX4549.