MAX4888AETI+

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, making it suitable for switching two half lanes of PCIe data. The device operates from a single +3.0V to +3.6V power supply and supports PCIe Gen I and Gen II data rates up to 5.0 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 is housed in a 28-pin TQFN package with an exposed paddle and functions within a temperature range of -40°C to +85°C.

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 PCB layout and impedance matching.
• Integrated ESD protection structures safeguard COM pins against static discharge events.

Analog Switches - Special Purpose Applications

• Desktop computers requiring PCIe lane reallocation
• Servers and storage area networks
• Laptops utilizing graphics card switching

Analog Switches - Special Purpose Procurement Notes

Verify the component authenticity by checking the marking code against official Analog Devices documentation. Confirm the package type matches the specified 28-TQFN form factor. Ensure the operating voltage requirements align with the system design constraints before integration into the final assembly process.

Analog Switches - Special Purpose Selection Notes

Select this component when designing systems that require switching PCIe signals between multiple destinations without active buffering. Consider the low quiescent current and single-supply operation for power-sensitive applications. Evaluate the thermal performance based on the specific board layout and ambient temperature conditions expected during operation.

Analog Switches - Special Purpose Part Context

This part belongs to the MAX4888A/MAX4889A family of high-speed passive switches manufactured by Analog Devices/Maxim Integrated. These devices are specifically engineered for PCIe applications, offering industry-compatible pinouts and lead-free packaging options to meet modern environmental standards while maintaining high signal integrity.

Analog Switches - Special Purpose Replacement Considerations

The MAX4889AEETI+ serves as a functional alternative within the same series, providing eight SPDT channels instead of four. Verify pin compatibility and channel count requirements before substitution to ensure proper signal routing in the target application design.

Analog Switches - Special Purpose FAQ

What is the maximum analog signal range accepted by the switches?

The switches accept standard PCIe signals up to a maximum level of V+ minus 1.2V.

How does the SEL input control the signal paths?

Driving the SEL input rail-to-rail selects the connection between the COM__ terminals and either the NO__ or NC__ terminals, effectively routing the signal path.

What ESD protection rating do the COM pins have?

The COM_+ and COM_- lines feature extra protection structures capable of withstanding ±6kV electrostatic discharge according to the Human Body Model.