MAX4999ETJ+

Analog Switches - Special Purpose Overview

The MAX4999ETJ+ is a differential Hi-Speed USB analog multiplexer designed for USB 2.0 low-, full-, and Hi-Speed applications, supporting data rates up to 480Mbps. It functions as an 8:1 multiplexer with three digital control inputs (C0, C1, C2) to select the signal path between common terminals (COM0, COM1) and eight differential pairs (D0_0/D0_1 through D7_0/D7_1). The device operates from a single +3.0V to +3.6V power supply and includes an internal charge pump allowing signal levels greater than the supply voltage. Key electrical parameters include a typical on-resistance of 6.5Ω, a -3dB bandwidth of 1200MHz, and low on/off capacitance of 3pF. It features an enable input for standby mode with ultra-low quiescent current of 30nA. The component is specified over an extended temperature range of -40°C to +85°C and is housed in a 5mm x 5mm, 32-pin TQFN package with an exposed pad.

Analog Switches - Special Purpose Feature Summary

• Supports USB 2.0 standard with high-speed switching capabilities up to 480Mbps
• Integrates an internal charge pump to handle signal amplitudes exceeding the supply voltage
• Features low on-capacitance and low on-resistance to minimize system losses and preserve signal integrity
• Includes an enable input that places all channels in a high-impedance state to minimize power consumption

Analog Switches - Special Purpose Applications

• Keyboard, Video, Mouse (KVM) systems
• Servers and RAID storage arrays
• Mass storage devices
• Workstations

Analog Switches - Special Purpose Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to ensure correct package type and RoHS compliance status. Confirm that the exposed pad connection requirements are met during assembly to maintain thermal performance and electrical grounding specifications.

Analog Switches - Special Purpose Selection Notes

Select this component for designs requiring differential USB 2.0 switching with minimal board space. Ensure the design supports the required +3.0V to +3.6V supply voltage and accommodates the 32-pin TQFN footprint. Consider the need for external bypass capacitors near the VCC pins to optimize AC performance.

Analog Switches - Special Purpose Part Context

The MAX4999 belongs to the Maxim Integrated family of USB analog switches and multiplexers. It is specifically engineered for high-density USB connectivity solutions where signal integrity at Hi-Speed data rates is critical. The device simplifies system architecture by integrating multiple switch channels into a single compact package.

Analog Switches - Special Purpose Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with existing circuit designs if considering alternative components from other manufacturers.