MAX4888ETI+G3U

Analog Switches - Special Purpose Overview

The MAX4888ETI+G3U is a high-speed passive switch designed for routing PCI Express (PCIe) data between two destinations. It features four single-pole/double-throw (4 x SPDT) channels, making it suitable for switching two half lanes of PCIe data. The device operates on a single power supply ranging from 1.65V to 3.6V and supports signaling data rates up to 3.0 Gbps. Key electrical parameters include a maximum on-resistance of 7 Ohms, a maximum turn-on time of 250 ns, and a maximum turn-off time of 50 ns. It functions within an operating temperature range of -40°C to +85°C and is housed in a 28-pin TQFN package with dimensions of 3.5mm x 5.5mm.

Analog Switches - Special Purpose Feature Summary

• Single digital control input (SEL) manages signal path selection between common and normally open/closed terminals.
• Low same-pair skew ensures minimal timing differences between differential signal lines.
• Flow-through pin configuration simplifies printed circuit board layout procedures.

Analog Switches - Special Purpose Applications

• Desktop Computers
• Servers/Storage Area Networks
• Laptops

Analog Switches - Special Purpose Procurement Notes

Verify the component authenticity by checking the manufacturer markings against official documentation. Confirm that the ordering suffix matches the required lead-free packaging specifications. Ensure the device meets the necessary RoHS compliance standards for your specific manufacturing requirements before finalizing procurement.

Analog Switches - Special Purpose Selection Notes

Select this component when designing systems requiring PCIe lane reallocation or dual graphics card support. Verify that the available power supply voltage falls within the specified 1.65V to 3.6V range. Consider the 28-pin TQFN package size constraints during the mechanical design phase to ensure proper footprint compatibility.

Analog Switches - Special Purpose Part Context

This part belongs to the MAX4888/MAX4889 family of high-speed passive switches manufactured by Analog Devices Inc./Maxim Integrated. While the MAX4889 offers eight channels in a larger package, the MAX4888 provides a quad-channel solution optimized for compact designs handling two half lanes of PCIe data.

Analog Switches - Special Purpose Replacement Considerations

The MAX4888ETI+ serves as the standard lead-free replacement variant for the MAX4888ETI. Both parts share identical electrical characteristics and pin configurations, differing only in the environmental compliance of the packaging materials.

Analog Switches - Special Purpose FAQ

How does the SEL input control the switching mechanism?

The SEL input acts as a digital control line. Driving it rail-to-rail selects the signal path between the COM__ and NO__/NC__ channels, effectively toggling the connection state of the analog switches.

What is the maximum supported signaling data rate?

The device is fully specified to support signaling data rates up to 3.0 Gbps, which accommodates PCIe Gen I applications running at 2.5 Gbps.

How should the exposed paddle be connected?

The exposed paddle (EP) must be connected directly to the ground plane to ensure proper thermal dissipation and electrical grounding for the device operation.