MAX4888ETI+

Analog Switches - Special Purpose Overview

The MAX4888AETI+ is a high-speed passive switch designed for routing PCI Express data between two destinations. It features four single-pole/double-throw (4 x SPDT) channels, supporting PCIe Gen I and Gen II data rates up to 5.0 Gbps. The device operates from a single +3.0V to +3.6V power supply with a maximum quiescent current of 120µA. Key electrical parameters include an on-resistance of 7Ω, same-pair skew of 7ps, turn-on time of 250ns, and turn-off time of 50ns. It is housed in a 28-pin TQFN package measuring 3.5mm x 5.5mm and functions within a temperature range of -40°C to +85°C.

Analog Switches - Special Purpose Feature Summary

• Single digital control input (SEL) switches signal paths between common and normally open/closed terminals.
• Low same-pair skew of 7ps ensures precise signal timing for high-speed data transmission.
• Flow-through pin configuration simplifies PCB layout and design procedures.
• ESD protection structures withstand ±6kV Human Body Model discharges on COM_+ and COM_- lines.

Analog Switches - Special Purpose Applications

• Desktop Computers
• Servers/Storage Area Networks
• Laptops

Analog Switches - Special Purpose Procurement Notes

Verify the component against official Analog Devices documentation to confirm specifications and authenticity. Ensure the ordering suffix matches the required lead-free/RoHS-compliant status. Check for any specific factory contact requirements if operating at voltages outside the standard +3.0V to +3.6V range, such as +2.5V or +1.8V.

Analog Switches - Special Purpose Selection Notes

Select the MAX4888AETI+ for applications requiring switching of two half lanes of PCIe data. Compare it with the MAX4889A if four half lanes are needed. Consider the 28-TQFN package size and the requirement for a single +3.0V to +3.6V supply when designing the system power architecture.

Analog Switches - Special Purpose Part Context

The MAX4888AETI+ belongs to the MAX4888A/MAX4889A family of 5.0Gbps PCI Express passive switches manufactured by Analog Devices Inc./Maxim Integrated. These devices are engineered to route PCIe signals for system configuration changes, such as splitting a 16-lane bus into two 8-lane buses for graphics applications like SLI or CrossFire.

Analog Switches - Special Purpose Replacement Considerations

The MAX4889AETI+ is the octal version of this device, offering eight SPDT channels instead of four. Verify channel count requirements before substitution. No other direct substitutes are documented in the provided datasheet.

Analog Switches - Special Purpose FAQ

What is the maximum data rate supported by the MAX4888AETI+?

The device supports PCIe Gen I and Gen II data rates up to 5.0 Gbps.

How does the SEL input control the switch?

Driving the SEL input rail-to-rail selects the signal path between the COM__ and NO__/NC__ channels, minimizing power consumption.

What is the ESD protection rating for the analog inputs?

The COM_+ and COM_- lines have extra protection structures that withstand ±6kV of electrostatic discharge using the Human Body Model.